02222nas a2200241   4500008004100000022001400041245007800055210006900133260007300202300001200275490000800287520134600295653002001641653001901661653002101680653004901701653002001750100002301770700002501793700002401818700002601842856011201868       2009                        eng d  a0011-916400aDefluoridation of drinking water using chemically modified bentonite clay0 aDefluoridation of drinking water using chemically modified bento  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcDEC  a687-6930 v2493 a<p>Adsorption potential of metal oxide (lanthanum, magnesium and manganese) incorporated bentonite clay was investigated for defluoridation of drinking water using batch equilibrium experiments to gain insight of adsorption behavior, kinetics and mechanisms of adsorption of fluoride ion. The effect of various physicochemical parameters such as pH, adsorbent dose, initial fluoride concentration and the presence of interfering co-ions on adsorption of fluoride has been investigated. The 10%La-bentonite shows higher fluoride uptake capacity for defluoridation of drinking water as compared to Mg-bentonite, Mn-bentonite and bare bentonite clay. The uptake of fluoride in acidic pH was higher as compared to alkaline pH. The equilibrium adsorption data fitted reasonably well in both Langmuir and Freundlich isotherm models. It was also observed that in the presence of certain co-existing ions can have positive effect on removal of fluoride, while carbonate and bicarbonate anions show deleterious effect. The rate of adsorption was reasonably rapid and maximum fluoride uptake was attained within 30 min. The modified adsorbent material shows better fluoride removal properties for actual field water, which could be due to the positive effect of other co-ions present in the field water. (C) 2009 Elsevier B.V. All rights reserved.</p>10a10%La-bentonite10aDefluoridation10aKinetic modeling10aLangmuir and Freundlich adsorption isotherms10aWater treatment1 aKamble, Sanjay, P.1 aDixit, Priyadarshini1 aRayalu, Sadhana, S.1 aLabhsetwar, Nitin, K.  uhttps://library.ncl.res.in/content/defluoridation-drinking-water-using-chemically-modified-bentonite-clay-002206nas a2200265   4500008004100000022001400041245008800055210006900143260007300212300001000285490000800295520125800303653001501561653001301576653002201589653003101611653003301642100002201675700002601697700002601723700002501749700002301774700002401797856011901821       2009                        eng d  a0926-860X00aVisible light induced photoreduction of methyl orange by N-doped mesoporous titania0 aVisible light induced photoreduction of methyl orange by Ndoped   aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAR  a26-330 v3573 a<p>N-doped mesoporous titania was synthesized using templating method. Biopolymer chitosan was used as a template and also as a nitrogen source along with ammonium hydroxide. Three different types of N-doped mesoporous titania were synthesized by varying composition of chitosan and titania precursor. These photocatalysts were characterized using XRD, BET-SA, FTIR, UV-DRS, SEM-EDX and XPS analysis. The photocatalytic activity of mesoporous titania was studied by methyl orange (MO) photoreduction reaction. From the experimental results it was observed that the N-doped mesoporous titania (1:2) gives the highest photocatalytic reduction of MO as compared to N-doped mesoporous titania prepared with (1:1) and (1:3) stoichiometry. This could be due to the optimal level of `N' incorporation in the N-doped mesoporous titania (1:2). Photocatalysts reduce the MO dye into derivative of hydrazine. Photoactivity of N-doped mesoporous titania (1:2) is 1.0721 mg of MO reduced per g of TiO2 vis-a-vis 0.508 mg of MO reduced per g of TiO2 for Degussa P25 photocatalyst. The effect of various operating parameters like photocatalyst loading. initial concentration and intensity of light also has been studied. (C) 2009 Elsevier B.V. All rights reserved.</p>10abiopolymer10aChitosan10aMO photoreduction10aN-doped mesoporous titania10aVisible active photocatalyst1 aJoshi, Meenal, M.1 aLabhsetwar, Nitin, K.1 aMangrulkar, Priti, A.1 aTijare, Saumitra, N.1 aKamble, Sanjay, P.1 aRayalu, Sadhana, S.  uhttps://library.ncl.res.in/content/visible-light-induced-photoreduction-methyl-orange-n-doped-mesoporous-titania-002246nas a2200277   4500008004100000022001400041245011100055210006900166260007300235300001000308490000800318520125700326653001501583653002101598653002501619653001301644653002101657100002301678700002401701700002401725700002001749700002601769700002401795700002601819856012301845       2010                        eng d  a0011-916400aAdsorption of fluoride from aqueous solution by alumina of alkoxide nature: batch and continuous operation0 aAdsorption of fluoride from aqueous solution by alumina of alkox  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcDEC  a15-230 v2643 a<p>In this investigation, we report the adsorption potential of alkoxide origin alumina for defluoridation of drinking water using batch and continuous mode of operations. The effects of different operating parameters such as adsorbent dose, initial fluoride concentration, pH of the solution and interfering ions (usually present in groundwater) were studied with a view to understand the adsorption behavior of the material under various conditions. A thermodynamic study shows that the adsorption of fluoride by alkoxide origin alumina is an exothermic and spontaneous process. The kinetic results showed that the fluoride sorption follows pseudo-second-order kinetics. The applicability of adsorbent in the field is also tested through column breakthrough studies. It has been observed that with an increase in the flow rate and initial fluoride concentration, the breakthrough curve becomes sharper and the breakthrough time and adsorbed fluoride ion concentration decrease. The breakthrough curve also becomes steeper as the bed height increases. The alkoxide origin alumina based adsorbent media can be used directly for field applications since it is also commercially available in granular form. (C) 2010 Elsevier B.V. All rights reserved.</p>10aAdsorption10aAlkoxide alumina10aBreakthrough studies10aFluoride10aKinetic modeling1 aKamble, Sanjay, P.1 aDeshpande, Gunavant1 aBarve, Prashant, P.1 aRayalu, Sadhana1 aLabhsetwar, Nitin, K.1 aMalyshew, Alexander1 aKulkarni, Bhaskar, D.  uhttps://library.ncl.res.in/content/adsorption-fluoride-aqueous-solution-alumina-alkoxide-nature-batch-and-continuous-002047nas a2200253   4500008004100000022001400041245006800055210006700123260010600190300001600296490000700312520114600319653002901465653002001494653002401514653001201538653002301550100002601573700002201599700002301621700002601644700002401670856009901694       2010                        eng d  a0360-319900aHydrogen evolution by a low cost photocatalyst: bauxite residue0 aHydrogen evolution by a low cost photocatalyst bauxite residue  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcOCT  a10859-108660 v353 a<p>Bauxite residue or red mud which is an aluminium industry waste has been used as a novel low cost photocatalyst active in visible light for the generation of hydrogen from water. The driving force behind the use of bauxite residue as a photocatalyst is not only the fact that it is widely available but also bauxite residue is a fine grained mixture of oxides and hydroxides (Fe(2)O(3), TiO(2), SiO(2), and Al(2)O(3), Al(OH)3). The photocatalyst was characterized with respect to BET-SA, UV-DRS, XRD, SEM and EDX. Hydrogen yield of 4600 mu mol/h/g of TiO(2) was achieved as compared to hydrogen evolution rate of 164 mu mol/h/g of TiO(2) for commercially available titania Degussa P-25. However, the hydrogen evolution was 20.85 mu mol/h/g of photocatalyst. The results suggest that bauxite residue appears to be a novel low cost photocatalyst. The various operating conditions of photocatalytic hydrogen generation were studied which include amount of catalyst, illumination intensity, illumination time, effect of various sacrificial donors etc. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.</p>10aAluminium industry waste10aBauxite residue10aHydrogen generation10aRed mud10aSacrificial donors1 aMangrulkar, Priti, A.1 aJoshi, Meenal, V.1 aKamble, Sanjay, P.1 aLabhsetwar, Nitin, K.1 aRayalu, Sadhana, S.  uhttps://library.ncl.res.in/content/hydrogen-evolution-low-cost-photocatalyst-bauxite-residue-001685nas a2200205   4500008004100000245009700041210006900138260000800207300001200215490000700227520096800234100002301202700002201225700001701247700002601264700002101290700002201311700002401333856012201357       2012                        eng d00aKinetic modeling and optimization of operating parameters for transvinylation of lauric acid0 aKinetic modeling and optimization of operating parameters for tr  cSEP  a624-6340 v443 aThe transition metal complex catalyzed transvinylation of carboxylic acid with vinyl acetate monomer is of significant interest to industry. The palladium complex catalyzed transvinylation of lauric acid using vinyl acetate monomer is a reversible reaction. In present article, design of experiments (DOE) statistics is used to study effects of various operating parameters on transvinylation of lauric acid. The kinetic parameters forward and backward rate constants and the thermodynamic parameters such as equilibrium constant and energy of activation of the transvinylation of lauric acid were estimated using the Dynochem model. The optimum operating parameters for the transvinylation of lauric acid were then predicted using the Dynochem model and verified by performing the actual experiments to validate the model. It was found that the experimental results match with the predicted one. (c) 2012 Wiley Periodicals, Inc. Int J Chem Kinet 44: 624634, 20121 aKamble, Sanjay, P.1 aManjarekar, Onkar1 aMawale, Ravi1 aKulkarni, Bhaskar, D.1 aChowdary, Naresh1 aGupte, Milind, Y.1 aBarve, Prashant, P.  uhttps://library.ncl.res.in/content/kinetic-modeling-and-optimization-operating-parameters-transvinylation-lauric-acid01875nas a2200193   4500008004100000022001400041245009600055210006900151260010400220300002300324520106100347100002601408700002301434700002201457700002501479700002601504700002401530856012701554       2012                        eng d  a1110-662X00aPhotocatalytic degradation of phenolics by N-doped mesoporous titania under solar radiation0 aPhotocatalytic degradation of phenolics by Ndoped mesoporous tit  a410 PARK AVENUE, 15TH FLOOR, \#287 PMB, NEW YORK, NY 10022 USAbHINDAWI PUBLISHING CORPORATIONcMAR  aArticle No. 7805623 a<p>In this study, nitrogen-doped mesoporous titania was synthesized by templating method using chitosan. This biopolymer chitosan plays the dual role of acting as a template (which imparts mesoporosity) and precursor for nitrogen. BET-SA, XRD, UV-DRS, SEM, and FTIR were used to characterize the photocatalyst. The doping of nitrogen into TiO2 lattice and its state was substantiated and measured by XPS. The photocatalytic activity of the prepared N-doped mesoporous titania for phenol and o-chlorophenol degradation was investigated under solar and artificial radiation. The rate of photocatalytic degradation was observed to be higher for o-chlorophenol than that of phenol. The photodegradation of o-chlorophenol was 98.62% and 72.2%, while in case of phenol, degradation to the tune of 69.25% and 30.58% was achieved in solar and artificial radiation. The effect of various operating parameters, namely, catalyst loading, pH, initial concentration and the effect of coexisting ions on the rate of photocatalytic degradation were studied in detail.</p>1 aMangrulkar, Priti, A.1 aKamble, Sanjay, P.1 aJoshi, Meenal, M.1 aMeshram, Jyotsna, S.1 aLabhsetwar, Nitin, K.1 aRayalu, Sadhana, S.  uhttps://library.ncl.res.in/content/photocatalytic-degradation-phenolics-n-doped-mesoporous-titania-under-solar-radiation-002224nas a2200193   4500008004100000022001400041245013000055210006900185260007100254300001400325490000700339520143400346100002401780700002301804700002701827700002201854700002601876856012801902       2012                        eng d  a0888-588500aPreparation of pure methyl esters from corresponding alkali metal salts of carboxylic acids using carbon dioxide and methanol0 aPreparation of pure methyl esters from corresponding alkali meta  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcFEB  a1498-15050 v513 a<p>In the present article, for the first time, we report the synthesis of alkyl esters by direct esterification of alkali metal salts of carboxylic acids using carbon dioxide and alcohol. Methyl acetate, methyl benzoate, methyl salicylate, and methyl lactate have been synthesized by esterification of sodium acetate, sodium benzoate, sodium salicylate, and calcium lactate, respectively. The esterification reaction was carried out in a batch as well as in a semicontinuous mode of operation. A detailed study on the esterification of calcium lactate using methanol and carbon dioxide was carried out to record the effects of various operating parameters (like CO2 pressure, reaction temperature, moisture content in the calcium lactate, and initial concentrations of calcium lactate) on the esterification reaction. This synthesis route produces highly pure methyl lactate by direct esterification of calcium lactate with calcium carbonate as byproduct. The byproduct calcium carbonate was characterized for its crystallinity, surface area, and pore volume. The process route has the advantage that the synthesized byproduct can be recycled into the fermenter to make corresponding alkali metal lactate or the finely precipitated calcium carbonate can be used for various other applications. Thus, the recovery and recycle of alkali metal is possible providing a pollution free process for synthesis of pure methyl lactate.</p>1 aBarve, Prashant, P.1 aKamble, Sanjay, P.1 aJoshi, Jyeshtharaj, B.1 aGupte, Milind, Y.1 aKulkarni, Bhaskar, D.  uhttps://library.ncl.res.in/content/preparation-pure-methyl-esters-corresponding-alkali-metal-salts-carboxylic-acids-using-002370nas a2200193   4500008004100000022001400041245022700055210006900282260007100351300001400422490000700436520149300443100002301936700002401959700002701983700001802010700002602028856012202054       2012                        eng d  a0888-588500aPurification of lactic acid via esterification of lactic acid using a packed column, followed by hydrolysis of methyl lactate using three continuously stirred tank reactors (CSTRs) in series: a continuous pilot plant study0 aPurification of lactic acid via esterification of lactic acid us  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcFEB  a1506-15140 v513 a<p>The world market of lactic acid is growing every year, mainly as a solvent and precursor to poly(lactic acid) (PLA). The cost of renewable biomass-derived PLA will have to compete with other synthetic polymers, if it is to grab a significant and sustainable fraction of the market share. It is thus necessary to have efficient and cost-effective technology for the production of pure-grade lactic acid (LA). In this article, a novel cost-effective, eco-friendly continuous process for the production of high-quality lactic acid at pilot plant scale has been demonstrated. The novelty of this process is that, for the first time, we report and use the concept of inverse reactive distillation for the esterification of crude concentrated LA in a continuous countercurrent packed column mode. This allows us to operate the column at higher temperatures, improving the kinetic rate process and leading to shorter columns. This is followed by the hydrolysis of methyl lactate (MLA) in a series of three continuously stirred tank reactors (CSTRs), where LA itself acts as a catalyst. The LA obtained in the pilot plant process shows 99.81% purity (by weight) on water-free basis and has an optical purity of 99.9%. The pilot scale experimental results pertaining to the autocatalytic esterification of LA and hydrolysis of MLA have been compared and validated, with respect to simulated results. The innovations reported here can make the process economically viable for commercial use.</p>1 aKamble, Sanjay, P.1 aBarve, Prashant, P.1 aJoshi, Jyeshtharaj, B.1 aRahman, Imran1 aKulkarni, Bhaskar, D.  uhttps://library.ncl.res.in/content/purification-lactic-acid-esterification-lactic-acid-using-packed-column-followed-002255nas a2200241   4500008004100000022001400041245008500055210006900140260007400209300000900283490000800292520136100300653002501661653003701686653002201723653003001745100002601775700002201801700002601823700002401849700002301873856011701896       2013                        eng d  a0049-697900aDefluoridation of drinking water using pural (R) MG-20 mixed hydroxide adsorbent0 aDefluoridation of drinking water using pural R MG20 mixed hydrox  aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcSEP  a17270 v2243 a<p>The potential ofmixed alumina-magnesia hydroxide adsorbent (PURAL (R) MG-20) for defluoridation of drinking water using batch and continuous mode of operations has been reported in the present article. Systematic adsorption experiments were carried out to elucidate the effects of different process parameters such as adsorbent dose, initial fluoride concentration, pH of the solution and effect of other ions (usually present in groundwater). These studies were aimed to understand the adsorption behaviour of the PURAL (R) MG-20 adsorbents. Fluoride adsorption by PURAL (R) MG-20 sorbent was found pH dependent. Maximum fluoride removal efficiency was observed in the range of pH 5-7. Langmuir isotherm described the data better than Freundlich and Temkin isotherm models and the adsorption capacity was found to be 5.62 mg g(-1) at initial fluoride concentration of 5.13 mg L-1, pH 7 and contact time 24 h. The kinetic result shows that the fluoride sorption follows pseudo-second-order kinetics. Column breakthrough studies were performed to test the performance of the adsorbent media at continuous mode of operation. Thus, it can be concluded that PURAL (R) MG-20 adsorbent can be used directly for field applications since it shows high fluoride uptake capacity under simulated drinking water conditions and it is also commercially available.</p>10aBreakthrough studies10aDefluoridation of drinking water10aKinetic modelling10aMixed hydroxide adsorbent1 aPatankar, Gaurang, V.1 aTambe, Amruta, S.1 aKulkarni, Bhaskar, D.1 aMalyshew, Alexander1 aKamble, Sanjay, P.  uhttps://library.ncl.res.in/content/defluoridation-drinking-water-using-pural-r-mg-20-mixed-hydroxide-adsorbent-002366nas a2200205   4500008004100000022001400041245008900055210006900144260011000213300001600323490000600339520156300345100002301908700002301931700002301954700002301977700002302000700002702023856011002050       2014                        eng d  a2046-206900aEmulsion ionic liquid membranes (EILMs) for removal of Pb(II) from aqueous solutions0 aEmulsion ionic liquid membranes EILMs for removal of PbII from a  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcOCT  a52316-523230 v43 a<p>Ionic liquids (ILs) are playing increasingly important roles in the membrane separation processes. The present manuscript discusses the removal of Pb(II) ions from aqueous solution using an emulsion ionic liquid membrane (EILM) process. Initially, the emulsion liquid membrane (ELM) was prepared by stirring strip phase (sulphuric acid) and organic phase (surfactant: span 80, extractant: D2EHPA, diluent: hexane) together under high speed agitation. Note that, the parameters of the ELM process such as emulsification speed, pH of the feed phase, treat ratio, extractant and surfactant concentrations were studied for the maximum removal of Pb(II) ions. The role of IL was explored by adding hydrophobic IL, octylmethylimidazole hexafluorophosphine ([OMIM][PF6]), in the organic phase. The performance of ELM with and without IL was compared on the basis of stability, enrichment factor and the removal efficiency for Pb(II). The results showed that the percentage of Pb(II) extraction was complete by the emulsion membrane with IL (EILM) in comparison to the 97% achieved by neat ELM. Further, the stability and the enrichment factor of the EILM were found to be 2-3 times greater than that of the ELM. The FT-IR spectroscopic analysis revealed that bond interactions between IL and membrane phase components avoided the coalescence of internal phase droplets and enhanced the emulsion stability. The results obtained in this work support the use of the IL [OMIM][PF6] as both a stabilizer and carrier for the overall improvement of the ELM process.</p>1 aLende, Avinash, B.1 aDinker, Manish, K.1 aBhosale, Vikas, K.1 aKamble, Sanjay, P.1 aMeshram, Pawan, D.1 aKulkarni, Prashant, S.  uhttps://library.ncl.res.in/content/emulsion-ionic-liquid-membranes-eilms-removal-pbii-aqueous-solutions-001322nas a2200241   4500008004100000022001400041245009800055210006900153260010600222300001400328490000700342520041700349653001600766653002100782653002200803653001500825653001600840100002600856700003100882700002300913700002200936856012200958       2016                        eng d  a0040-403900aConcise enantioselective synthesis of (+)-sertraline and (-)-CP-52002 using proline catalysis0 aConcise enantioselective synthesis of sertraline and CP52002 usi  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcMAR  a1053-10550 v573 a<p>A short enantioselective synthesis of (+)-sertraline and its C-4 epimer (-)-CP-52002 with an overall yield of 30%, respectively, as its hydrochloride has been described. The key steps are the proline catalyzed Mannich reaction of acetaldehyde and acid catalyzed intramolecular Friedel-Crafts' alkylation reaction of olefin proceeding with high optical purities. (C) 2016 Elsevier Ltd. All rights reserved.</p>10aIndatraline10aMannich reaction10aProline catalysis10aSertraline10aTametraline1 aKalshetti, Rupali, G.1 aVenkataramasubramanian, V.1 aKamble, Sanjay, P.1 aSudalai, Arumugam  uhttps://library.ncl.res.in/content/concise-enantioselective-synthesis-sertraline-and-cp-52002-using-proline-catalysis02784nas a2200241   4500008004100000022001400041245011900055210006900174260010600243300001200349490000800361520183000369653002202199653002002221653002402241653001002265653002502275653004402300100002202344700002302366700002702389856012602416       2016                        eng d  a0045-653500aEfficacy of zero-valent copper (Cu-0) nanoparticles and reducing agents for dechlorination of mono chloroaromatics0 aEfficacy of zerovalent copper Cu0 nanoparticles and reducing age  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcSEP  a359-3660 v1593 a<p>The zero-valent copper (Cu-0) nanoparticles were prepared by chemical reduction method. The morphology of nanoparticles was investigated by using X ray diffraction, scanning electron microscopy-energy dispersive X ray, UV-visible spectrophotometer and Brunauer-Emmett-Teller surface area analyser. The Cu-0 nanoparticles along with reducing agents, NaBH4/5% acidified alcohol were used for the dechlorination of chloroaromatics at room temperature. Chlorobenzene (Cl-B), chlorotoluene (Cl-T), chloropyridine (Cl-Py) and chlorobiphenyl (Cl-BPh) were selected as the contaminants. The effect of various operating parameters such as pH, concentration of the catalyst and reducing agent (NaBH4), and recycling of the catalyst on dechlorination were studied. Nearly complete dechlorination of all the chloroaromatics were achieved in the presence of Cu-0 nanoparticles (2.5 g L-1) and NaBH4 (1.0 g L-1.) within 12 h. On the contrary, approximately 70% of dechlorination was observed in the presence of 5% acidified alcohol at similar experimental conditions. The dechlorination mechanism highlighted the importance of Cu-0 nanoparticles as a surface mediator. The kinetics of the dechlorination of chloroaromatics was investigated and compared with chloroaliphatics. The dechlorination rate differed from 0.23 h(-1) (Cl-B) to 0.15 h(-1) (Cl-BPh) in the presence of Cu-0 nanoparticles and NaBH4. The effectiveness of Cu nanoparticles with NaBH4 (1 g L-1) and 5% acidified alcohol as electron donors were studied by oxidation-reduction potential and observed to be -1016 mV and -670 mV, respectively. Final products of the dechlorination were benzene, toluene, pyridine and biphenyl, as identified by gas chromatograph mass spectrometer and nuclear magnetic resonance spectroscopy. (C) 2016 Elsevier Ltd. All rights reserved.</p>10aAcidified alcohol10aChloroAromatics10aHydrodechlorination10aNaBH410aWastewater treatment10aZero-valent copper (Cu-0) nanoparticles1 aRaut, Sandesh, S.1 aKamble, Sanjay, P.1 aKulkarni, Prashant, S.  uhttps://library.ncl.res.in/content/efficacy-zero-valent-copper-cu-0-nanoparticles-and-reducing-agents-dechlorination-mono01046nas a2200193   4500008004100000022001400041245005700055210005400112260011000166300001400276490000700290520034600297100002400643700002600667700002300693700002300716700002200739856009100761       2016                        eng d  a1477-052000aI-2-mediated regioselective C-3 azidation of indoles0 aI2mediated regioselective C3 azidation of indoles  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcFEB  a3027-30300 v143 a<p>An unprecedented synthesis of novel 3-azido indoles has been developed using I-2 and NaN3 in high yields and excellent regio-selectivity. The reaction proceeds under metal-free conditions at room temperature. Essentially, an umpolung in reactivity at the C-3 position of indole has been achieved by the activation of indoles with I-2.</p>1 aPrasad, Pragati, K.1 aKalshetti, Rupali, G.1 aReddi, Rambabu, N.1 aKamble, Sanjay, P.1 aSudalai, Arumugam  uhttps://library.ncl.res.in/content/i-2-mediated-regioselective-c-3-azidation-indoles-001574nas a2200181   4500008004100000245007900041210006900120260000800189300001400197490000700211520095600218100002201174700002401196700001701220700002601237700002301263856010601286       2016                        eng d00aKinetic studies on an algal biofilm reactor for raw sewage water treatment0 aKinetic studies on an algal biofilm reactor for raw sewage water  cSEP  a1629-16350 v393 aA packed-bed algae biofilm reactor was developed using porous and nonporous dual packings. The biofilm was cultivated on reticulated polyurethane foam cubes. The nonporous glass Raschig rings were taken as bed support that helps to remove generated gas from the system. The effect of variables such as column length-to-diameter ratio, catalyst cube dimension, and feed flow rate on the treatment of sewage water was studied. The reaction kinetics indicates that the nutrients uptake rate is dependent on both pore and film diffusion. The kinetics of uptake of nutrients follows a pseudo first-order reaction. From the pseudo reaction rate constant, Thiele modulus and effectiveness factor were calculated and a kinetic model equation for fractional nutrient uptake was developed in terms of operating variables. The model can predict the reaction rate with low deviation. The results obtained may be valuable for large-scale treatment of sewage water.1 aGera, Gayatri, S.1 aYewalkar, Swati, N.1 aNene, Sanjay1 aKulkarni, Bhaskar, D.1 aKamble, Sanjay, P.  uhttps://library.ncl.res.in/content/kinetic-studies-algal-biofilm-reactor-raw-sewage-water-treatment-001490nas a2200253   4500008004100000022001400041245017700055210006900232260010600301300001200407490000700419520047900426653001800905653002700923653001400950653000900964653002300973100001600996700002301012700002501035700002301060700002201083856013101105       2016                        eng d  a0040-403900aPd-catalyzed reductive cleavage of N-N bond in dibenzyl-1-alkylhydrazine-1,2-dicarboxylates with PMHS: application to a formal enantioselective synthesis of (R)-sitagliptin0 aPdcatalyzed reductive cleavage of NN bond in dibenzyl1alkylhydra  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcFEB  a684-6870 v573 a<p>An environmentally benign approach involving Pd-catalyzed reductive N-N bond cleavage in dibenzyl-1-alkylhydrazine-1,2-dicarboxylates leading to the synthesis of N-(tert-butoxy)carbamates under very mild conditions has been described. PMHS serves as an inexpensive source of hydride in MeOH/deionized H2O medium. This protocol has been successfully applied in the formal synthesis of (R)-sitagliptin, an anti-diabetic drug. (C) 2015 Elsevier Ltd. All rights reserved.</p>10aanti-Diabetic10aEnvironmentally benign10aHydrazine10aPMHS10aReductive cleavage1 aDey, Soumen1 aGadakh, Sunita, K.1 aAhuja, Brij, Bhushan1 aKamble, Sanjay, P.1 aSudalai, Arumugam  uhttps://library.ncl.res.in/content/pd-catalyzed-reductive-cleavage-n-n-bond-dibenzyl-1-alkylhydrazine-12-dicarboxylates-pmhs-002212nas a2200289   4500008004100000022001400041245016400055210006900219260011000288300001000398490000700408520106800415653003101483653002701514653002501541653003301566653001601599653003501615653001901650653002001669100001801689700002001707700002201727700002601749700002301775856012401798       2016                        eng d  a0376-471000aPhotocatalytic degradation of ciprofloxacin center dot HCl using Aeroxide (R) P-25 TiO2 photocatalyst: comparative evaluation of solar and artificial radiation0 aPhotocatalytic degradation of ciprofloxacin center dot HCl using  aDR K S KRISHNAN MARG, PUSA CAMPUS, NEW DELHI 110 012, INDIAbNATL INST SCIENCE COMMUNICATION-NISCAIRcJAN  a16-220 v553 a<p>The photocatalytic degradation of ciprofioxacin (CFX) has been investigated using Aeroxide (R) P-25 TiO2 photocatalyst in the presence of solar as well as artificial radiation. The effects of different operating parameters like initial concentration of CFX, catalyst loading, pH of solution and effect of co-existing ions on photocatalytic degradation of CFX have been investigated with a view to establish the optimum operating conditions. It is observed that as the initial concentration of CFX increases, the rate of photocatalytic degradation decreases. Optimum catalyst loading is observed at 1 g L-1 for CFX concentration of 100 mg L-1. Over the pH range 3-11, maximum degradation rate occurs at pH 9. The mechanism and intermediates formed during the photocatalytic degradation of CFX are discussed based on UPLC-MS/MS analysis. From kinetic studies, it is found that the photocatalytic degradation obeys pseudo-first order kinetics. The degradation rate constant using solar radiation is about 1.7 times higher than that under artificial radiation.</p>10aAdvanced oxidation process10aAeroxide (R) P-25 TiO210aArtificial radiation10aCiprofloxacin center dot HCl10aDegradation10aPharmaceutical micropollutants10aPhotocatalysis10aSolar radiation1 aShetty, Rohit1 aKothari, Gaurav1 aTambe, Amruta, S.1 aKulkarni, Bhaskar, D.1 aKamble, Sanjay, P.  uhttps://library.ncl.res.in/content/photocatalytic-degradation-ciprofloxacin-center-dot-hcl-using-aeroxide-r-p-25-tio2-002171nas a2200169   4500008004100000245014400041210006900185260000800254490000700262520148400269100001801753700002201771700003201793700002601825700002301851856012701874       2017                        eng d00aPhotocatalytic degradation of pharmaceuticals pollutants using N-doped TiO 2 photocatalyst: identification of CFX degradation intermediates0 aPhotocatalytic degradation of pharmaceuticals pollutants using N  cFEB0 v593 aThe N-doped TiO2 photocatalyst was synthesized by the sol–gel method and characterized in detail in terms of its morphology, structure and composition. The prepared N-doped TiO2 exhibited polycrystalline structure having particle sizes of around 50–120 nm and rod-shaped geometry. The N-doped TiO2 was subsequently used for the photocatalytic degradation (PCD) of pharmaceutical micropollutants, namely ciprofloxacin HCl (CFX), naproxen (NPX) and paracetamol (PARA) and it was found that the rate of degradation of CFX and NPX is higher than that of PARA. To verify the beneficial effect of N-doped TiO2 for PCD of CFX, similar experiments were carried out using commercially available Aeroxide P-25 TiO2. It was observed that N-doped TiO2 was more efficient than Aeroxide® P-25 TiO2. It was also found that the PCD of CFX in the presence of N-doped TiO2 was highly efficient under the solar radiation as compared with artificial radiation. The effect of various operating parameters, such as adsorption of CFX, pH of the aqueous solution, effect of co-existing ions on PCD of CFX, was investigated using artificial radiation and optimum conditions were established. The intermediates formed during the PCD of CFX were identified using liquid chromatography tandem mass chromatography (LC-MS/MS). The presented results demonstrate that N-doped TiO2 photocatalyst shows excellent photocatalytic activity in the visible region for the degradation of pharmaceutical pollutants.1 aShetty, Rohit1 aChavan, Vilas, B.1 aKulkarni, Prashant, Shripad1 aKulkarni, Bhaskar, D.1 aKamble, Sanjay, P.  uhttps://library.ncl.res.in/content/photocatalytic-degradation-pharmaceuticals-pollutants-using-n-doped-tio-2-photocatalyst02068nas a2200205   4500008004100000022001500041245015200056210006900208260000800277300001200285490000800297520128200305100002501587700002801612700002301640700002601663700002401689700002301713856012601736       2018                        eng d  a 0959-652600a Process intensification strategies for enhanced holocellulose solubilization: Beneficiation of pineapple peel waste for cleaner butanol production0 aProcess intensification strategies for enhanced holocellulose so  cOCT  a937-9470 v1993 aBiorefinery sector has become a serious dispute for cleaner and sustainable development in recent years. In the present study, pretreatment of pineapple peel waste was carried out in high pressure reactor using various pretreatment-enhancers. The type and concentration effect of each enhancer on hemicellulose solubilization was systematically investigated. The binary acid (phenol + sulfuric acid) at 180 degrees C was found to be superior amongst other studied enhancers, giving 81.17% (w/v) hemicellulose solubilization in liquid-fraction under optimized conditions. Solid residue thus obtained was subjected to enzymatic hydrolysis that resulted into 24.50% (w/v) cellulose breakdown. Treated solid residue was further characterized by scanning electron microscopy and fourier transform infrared spectroscopy to elucidate structural changes. The pooled fractions (acid treated and enzymatically hydrolyzed) were fermented using Clostridium acetobutylicum NRRL B 527 which resulted in butanol production of 5.18 g/L with yield of 0.13 g butanol/g sugar consumed. Therefore, pretreatment of pineapple peel waste evaluated in this study can be considered as milestone in utilization of low cost feedstock, for bioenergy production. (C) 2018 Elsevier Ltd. All rights reserved.1 aKhedkar, Manisha, A.1 aNimbalkar, Pranhita, R.1 aKamble, Sanjay, P.1 aGaikwad, Shashank, G.1 aChavan, Prakash, V.1 aBankar, Sandip, B.  uhttps://library.ncl.res.in/content/process-intensification-strategies-enhanced-holocellulose-solubilization-beneficiation01927nas a2200217   4500008004100000022001400041245011600055210006900171260000800240300001600248490000700264520115800271100002101429700002101450700002101471700001801492700002301510700002501533700001901558856013201577       2019                        eng d  a0888-588500aPreparation and activity of copper-gallium nanocomposite catalysts for carbon dioxide hydrogenation to methanol0 aPreparation and activity of coppergallium nanocomposite catalyst  cNOV  a21331-213400 v583 a<p>Copper (Cu) nanocomposite catalysts with gallium (Ga) and aluminum (Al) were prepared using the simultaneous coprecipitation digestion method. The catalysts were characterized by N-2 adsorption, N2O titration, XRD (X-ray diffraction), H-2-TPR (H-2 temperature-programmed reduction), XPS (X-ray photoelectron spectroscopy), and CO2-TPD (CO2 temperature-programmed desorption) techniques, and CO2 hydrogenation to methanol synthesis was performed. The use of Ga in Cu catalysts enhanced the weak basic sites more than the Cu catalysts with Al. With the CuGa nanocomposite formation, the catalyst showed a sequential reduction of CuO, for example, Cu+2 to Cu+ to Cu-0, and the Cu surface area was also high in comparison with CuAl. These findings confirmed that both the Cu surface area and CuO reducibility in the catalyst helped to boost the conversion of CO2, whereas selectivity to methanol was associated with the basicity of the catalyst. CuAl catalysts showed very poor selectivity to methanol despite CO formation, which could be due to the weak interaction of the CuAl nanocomposite catalysts compared to the CuGa nanocomposite catalysts.</p>
1 aHengne, Amol, M.1 aYuan, Ding, Jier1 aDate, Nandan, S.1 aSaih, Youssef1 aKamble, Sanjay, P.1 aRode, Chandrashekhar1 aHuang, Kuo-Wei  uhttps://library.ncl.res.in/content/preparation-and-activity-copper-gallium-nanocomposite-catalysts-carbon-dioxide-hydrogenation02489nas a2200145   4500008004100000245009800041210006900139260001300208300001200221520192100233100001902154700002202173700002302195856012502218       2019                        eng d00aRemoval of pharmaceutical and personal care products from wastewater using advanced materials0 aRemoval of pharmaceutical and personal care products from wastew  bElsevier  a173-2123 aRecently, pharmaceuticals and personal care products (PPCPs) have attracted much attention because of their requirement in everyday life and huge production/consumption worldwide. India’s pharmaceutical industry has emerged as the world’s third largest in terms of volume of production. As a leading science-based industry, the pharmaceutical industry contributes to the tune of 1% of India’s total GDP. Ever increasing international demand of these products drives continued rapid expansion of the pharmaceutical industry. India becomes a preferred manufacturing location for PPCPs, which is obvious from the export of PPCPs to over 65 countries. This is primarily because of the manufacturing cost advantage. Nevertheless, the major concern of these PPCPs is their nonpassive nature. They are not benign travelers in the environment but rather they are bioaccumulative and their retention becomes toxic to wildlife and human beings. It is reported that residual PPCPs may cause endocrine disruptions that can change hormonal actions, although the adverse impact of PPCPs on human health and the environment is still not fully understood. Therefore, there is an urgent need to protect our limited water resources and the available aquatic species from deterioration due to residual PPCPs. A variety of technologies, including physical, biological, and chemical processes, have been extensively investigated for the removal of PPCPs from wastewater. Recently, advanced oxidation processes (AOPs) and advanced materials have shown great promise as an efficient alternative for mineralization of such refractory species. Therefore, a critical review of the recent advances in PPCP removal is imperative to gauge their performance. In this chapter, we briefly summarize the advances made in the technologies for PPCPs removal, followed by an in-depth review of the removal of PPCPs by advanced materials and AOPs.1 aMorone, Amruta1 aMulay, Prajakatta1 aKamble, Sanjay, P.  uhttps://library.ncl.res.in/content/removal-pharmaceutical-and-personal-care-products-wastewater-using-advanced-materials01967nas a2200241   4500008004100000022001400041245009100055210006900146260000800215300001100223490000700234520119300241653001701434653001301451653001901464653001501483653001501498100002301513700002401536700002301560700002701583856011501610       2019                        eng d  a2214-714400aSeparation of nitroaromatics from wastewater by using supported ionic liquid membranes0 aSeparation of nitroaromatics from wastewater by using supported   cDEC  a1009250 v323 a<p>Nitroaromatics have been released into wastewater during its production and application, thus, contaminating the ecosystem. The stringent discharge limits of industrial effluents have led to the development of sustainable technologies for removal of nitroaromatics from wastewater. In the present investigation, separation of nitroaromatic compounds such as TNT, TNP and Tetryl from model wastewater was investigated by using supported ionic liquid membrane (SILM) process. Various aliquat 336 based ionic liquids (ILs) were synthesised and characterized, and immobilized in PTFE and PVDF supports for the preparation of SILMs. The key parameters such as type of IL and striping phase, feed phase pH, selectivity for SILM, extraction kinetics and reuse of SILM were studied, in detail. The size of IL-anion plays an important role in removal process. The SILM was found to be selective for TNP over other nitroaromatics. Maximum separation of TNP (&lt; 95%) was achieved with IL, [A336][SCN] within 12 h. Selectivity and reuse of the membrane indicate the potential of SILM technology as a sustainable chemical process for the treatment of nitroaromatics contaminated wastewater.</p>
10aIonic liquid10aMembrane10aNitroaromatics10aSeparation10awastewater1 aBhosale, Vikas, K.1 aChana, Harpreet, K.1 aKamble, Sanjay, P.1 aKulkarni, Prashant, S.  uhttps://library.ncl.res.in/content/separation-nitroaromatics-wastewater-using-supported-ionic-liquid-membranes01281nas a2200253   4500008004100000022001400041245016500055210006900220260000800289300001200297490000700309520036900316653001500685653002700700653001900727653002100746653002400767653002800791100001900819700002000838700002300858700002200881856012400903       2020                        eng d  a0376-469900aConcise enantioselective synthesis of (R)-(+)-goniothalamin oxide, a trypanocidal active agent via L-prolinol catalyzed asymmetric epoxidation of cinnamaldehyde0 aConcise enantioselective synthesis of Rgoniothalamin oxide a try  cMAR  a393-3980 v593 a<p>A short and straight-forward enantioselective synthesis of (R)-(+)-goniothalamin oxide 2 has been achieved with an overall yield of 39% and 99% ee. The synthetic approach involves L-prolinol catalyzed asymmetric epoxidation of cinnamaldehyde followed by Lewis acid-mediated diastereoselective allylation of epoxy aldehyde as the key chiral-inducing steps.</p>
10aAllylation10aasymmetric epoxidation10aEsterification10aGrubbs' catalyst10aL-prolinol catalyst10aRing closing metathesis1 aKumar, Senthil1 aMandle, Ram, D.1 aKamble, Sanjay, P.1 aSudalai, Arumugam  uhttps://library.ncl.res.in/content/concise-enantioselective-synthesis-r-goniothalamin-oxide-trypanocidal-active-agent-l02344nas a2200181   4500008004100000245008100041210006900122260000800191300001200199490000700211520172300218100001701941700002301958700002401981700002102005700002302026856011302049       2020                        eng d00aFluoride release and fluoride-recharging ability of three different sealants0 aFluoride release and fluoriderecharging ability of three differe  cJUL  a247-2520 v383 a<p><span style="color: rgb(51, 51, 51); font-family: Roboto, Arial, sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400;">Background: We aimed to determine the fluoride release and fluoride-recharging ability of a sealant containing surface pre-reacted glass (S-PRG) ionomer filler particles (BeautiSealant) with a fluoride-releasing resin sealant (Helioseal F), and a glass-ionomer sealant (Fuji VII). Materials: And: Methodology: Forty-eight disc-shaped specimens of each material were immersed in deionized water to determine the fluoride release utilizing a fluoride ion-selective electrode. After 21 days, 8 specimens were soaked in 0.22% Sodium Fluoride solution for 2 min; 8 specimens were coated with 1.23% Acidulated Phosphate Fluoride (APF) gel for 4 min, and the fluoride-recharging ability was evaluated for 40 days. Data were analyzed using one way-ANOVA and Bonferroni post hoc tests. Results: Total fluoride release over the 21-day period was: Fuji VII &gt; BeautiSealant &gt; Helioseal F, (P = 0.000). After refluoridation of the specimens with 0.22% Sodium Fluoride solution, the cumulative fluoride release during the 40-day period for each material was: BeautiSealant &gt; Fuji VII &gt; Helioseal (P = 0.000). After exposure to 1.23% APF gel, the cumulative fluoride release during the 40-day period for each material was: BeautiSealant &gt; Fuji VII &gt; Helioseal F (P = 0.000). Conclusion: Glass ionomer-based sealants (Fuji VII) exhibited higher initial fluoride release whilst the surface pre-reacted glass-ionomer filler containing sealant (BeautiSealant) demonstrated superior fluoride recharging properties.</span></p>1 aPatil, Sneha1 aKontham, Ujwal, R.1 aKontham, Rakesh, K.1 aPatil, Smita, S.1 aKamble, Sanjay, P.  uhttps://library.ncl.res.in/content/fluoride-release-and-fluoride-recharging-ability-three-different-sealants01235nas a2200229   4500008004100000022001400041245010300055210006900158260000800227300001400235490000700249520043000256653002600686653002000712653003000732653002500762100002600787700002000813700002300833700002200856856012700878       2020                        eng d  a0376-469900aP2O5-mediated Friedel-Crafts acylation of activated arenes with carboxylic acid as acylating agent0 aP2O5mediated FriedelCrafts acylation of activated arenes with ca  cDEC  a1861-18670 v593 a<p>P2O5 has been found to be a highly efficient and environmental friendly catalyst for the liquid-phase acylation of activated aromatic substrates giving aromatic ketones (45-93%) in a regioselective manner. Both aromatic and aliphatic carboxylic acids can be employed as acylating source. The process is particularly demonstrated at 100 g scale in the case of anisole and acetic acid to produce 4-methoxyacetophenone.</p>
10a4-methoxyacetophenone10aCarboxylic acid10aFriedel-Crafts acylations10aphosphorus pentoxide1 aKalshetti, Rupali, G.1 aMandle, Ram, D.1 aKamble, Sanjay, P.1 aSudalai, Arumugam  uhttps://library.ncl.res.in/content/p2o5-mediated-friedel-crafts-acylation-activated-arenes-carboxylic-acid-acylating-agent02499nas a2200265   4500008004100000022001400041245014800055210006900203260000800272300001100280490000800291520156300299653001901862653001801881653002401899653001301923653002601936653002701962100002201989700001802011700002302029700002302052700002702075856013102102       2020                        eng d  a0045-653500aScreening of zero valent mono/bimetallic catalysts and recommendation of Raney Ni (without reducing agent) for dechlorination of 4-chlorophenol0 aScreening of zero valent monobimetallic catalysts and recommenda  cJUL  a1262980 v2503 a<p>Chlorophenol (CP) is considered as environmentally hazardous material due to its acute toxicity, persistent nature and strong bioaccumulation. The dechlorination of 4-CP was investigated by using various catalysts such as bimetallic (Fe-0/Cu-0, Al-0/Fe-0), Pd/C, Raney Ni and Fe-0 at room temperature. Among the catalysts studied, Raney Ni proved to be very economical and efficient catalyst that worked without the use of an external reducing agent. The dechlorination of 4-CP by Raney Ni was therefore further explored. Complete dechlorination of 4-CP (30 mg L-1) was achieved in 6 hat an optimum Raney Ni catalyst loading of 3 g L-1. The effect of triethylamine (TEA) and tripropylamine (TPA) was also investigated and it was observed that 100% dechlorination is possible in presence of 45 mg L-1 of TEA. The kinetics of dechlorination of 4-CP was investigated and found to be first order with a rate constant of 0.017 min(-1) at 50 degrees C, and it enhances to 0.109 min(-1) with addition of TEA. In the absence of a reducing agent, acidic to neutral pH favors dechlorination of 4-CP. The final product of dechlorination was estimated to be phenol by performing HPLC, LCMS and NMR analysis. Based on the results, a probable dechlorination mechanism of 4-CP is also proposed. It can be concluded that the catalytic hydrodechlorination is an effective and economical technique for dechlorination of 4-CP and it has a potential for the dechlorination of other toxic derivatives of chlorinated aromatics. (C) 2020 Elsevier Ltd. All rights reserved.</p>
10a4-Chlorophenol10aCl- scavenger10aHydrodechlorination10aRaney Ni10aRecycling of catalyst10aWithout reducing agent1 aRaut, Sandesh, S.1 aShetty, Rohit1 aRaju, Nikhi, Maria1 aKamble, Sanjay, P.1 aKulkarni, Prashant, S.  uhttps://library.ncl.res.in/content/screening-zero-valent-monobimetallic-catalysts-and-recommendation-raney-ni-without-reducing01441nas a2200277   4500008004100000022001400041245014000055210006900195260000800264300001400272490000900286520047600295653001100771653002200782653002800804653002000832653002200852100002500874700002000899700002300919700002100942700002300963700002200986700002501008856013001033       2020                        eng d  a1434-193X00aTriethyl phosphite/benzoyl peroxide mediated reductive dealkylation of O-benzoylhydroxylamines: a cascade synthesis of secondary amides0 aTriethyl phosphitebenzoyl peroxide mediated reductive dealkylati  cJUL  a4235-42380 v20203 a<p>A new triethyl phosphite/benzoyl peroxide (BPO) mediated system has been developed for the synthesis of secondary amides with good to excellent yields in a single step. This unprecedented cascade process involves sequential reduction of N-O bond and benzoylation followed by dealkylation of N-C bond ofO-benzoylhydroxylamines (O-BHA). The methodology is versatile as it tolerates a variety of aromatic and aliphaticO-BHA as substrates to access secondary amides.</p>
10aAmides10aCascade reactions10aO-Benzoylhydroxylamines10aRedox reactions10asynthetic methods1 aAegurla, Balakrishna1 aMandle, Ram, D.1 aShinde, Prasad, G.1 aParit, Ratan, S.1 aKamble, Sanjay, P.1 aSudalai, Arumugam1 aSenthilkumar, Beeran  uhttps://library.ncl.res.in/content/triethyl-phosphitebenzoyl-peroxide-mediated-reductive-dealkylation-o-benzoylhydroxylamines02025nas a2200241   4500008004100000022001400041245016300055210006900218260000800287300001600295490000700311520115500318653001701473653001901490653001901509653002601528653001701554653001501571100002201586700002301608700002701631856012501658       2021                        eng d  a0944-134400aImproved photocatalytic efficiency of TiO2 by doping with tungsten and synthesizing in ionic liquid: precise kinetics-mechanism and effect of oxidizing agents0 aImproved photocatalytic efficiency of TiO2 by doping with tungst  cAPR  a17532-175450 v283 a<p>The degradation of nitroaromatics/toxic energetic compounds contaminated water is a major cause of concern. W-doped TiO2 nanoparticles (NPs) were synthesized in ionic liquid, ethyl methyl imidazolium dicyanamide (EMIM-DCA) by a solvothermal method. The developed NPs were sintered at 500 degrees C and characterized by UV-Vis-DRS, FT-IR, FE-SEM, XRD, XPS, and BET techniques. The 30-40-nm-sized NPs were subjected to photocatalytic degradation of the toxic energetic compound, tetryl (2,4,6-trinitrophenylmethylnitramine) under UV-Vis light. Various operating parameters such as the effect of concentration of catalyst, pH of feed phase, oxidizing agents, and recycling of catalyst were studied in detail. For the first time, the degradation-mechanism pathway and kinetics of tetryl were evaluated. The degradation products were precisely analyzed by using HPLC, GC-MS, and TOC techniques. The USEPA has prescribed a drinking water limit of 0.02 mg L-1, and it was found that 0.5 g of 4% W-TiO2 could totally degrade tetryl (50 mg L-1) within 8 h. The kinetic rate constant of 4% W-TiO2 was 0.356 h(-1), whereas pure TiO2 showed 0.207 h(-1).</p>
10aIonic liquid10aNitroaromatics10aPhotocatalysis10aRecycling of catalyst10aW-doped TiO210awastewater1 aRaut, Sandesh, S.1 aKamble, Sanjay, P.1 aKulkarni, Prashant, S.  uhttps://library.ncl.res.in/content/improved-photocatalytic-efficiency-tio2-doping-tungsten-and-synthesizing-ionic-liquid01985nas a2200229   4500008004100000022001400041245010500055210006900160260000900229300001400238490000600252520119000258653001201448653002101460653001801481653002101499653002801520100002301548700002301571700002901594856013201623       2021                        eng d  a2365-654900aSingle-pot alcoholysis of furfuryl alcohol to alkyl levulinates using heterogenized p-TSA catalyst**0 aSinglepot alcoholysis of furfuryl alcohol to alkyl levulinates u  cJUL   a6636-66430 v63 aSynthesis of levulinate esters which are known to be excellent sustainable fuel additives, was achieved by alcoholysis of furfuryl alcohol over strong solid acid catalyst, prepared by copolymerization of p-toluenesulfonic acid with paraformaldehyde. Our catalyst possessed Bronsted acidity (3 mmol/g) with an excellent stability up to 220 degrees C. XPS, FT-IR and Pyridine-IR along with microanalysis studies confirmed the presence of terminal -SO3H functional groups responsible for Bronsted acidity in the catalyst. The catalyst was found to efficiently catalyze the alcoholysis of furfuryl alcohol to give alkyl levulinates under mild reaction conditions. The complete conversion of furfuryl alcohol with 96 % and 97 % selectivities to ethyl and butyl levulinates could be achieved using ethanol and butanol, respectively. Detailed study on effect of various reaction parameters like catalyst loading, reaction time and reaction temperature on conversion and product distribution was also carried out for the ethanolysis of furfuryl alcohol to ethyl levulinate. The catalyst could be easily recovered and recycled for five times successfully, with no loss in its original activity.10aBiomass10aethyl levulinate10aFuel additive10aFurfuryl alcohol10aheterogeneous catalysis1 aPatil, Chetana, R.1 aKamble, Sanjay, P.1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/single-pot-alcoholysis-furfuryl-alcohol-alkyl-levulinates-using-heterogenized-p-tsa-catalyst01902nas a2200277   4500008004100000022001400041245020300055210006900258260000800327300001200335490000700347520088600354653001901240653002201259653002201281653003201303653002601335653000901361100002301370700002001393700002301413700002201436700002601458700001601484856012401500       2021                        eng d  a1747-027700aOn the use of electronegativity and electron affinity based pseudo-molecular field descriptors in developing correlations for quantitative structure-activity relationship modeling of drug activities0 ause of electronegativity and electron affinity based pseudomolec  cAUG  a258-2690 v983 aFor quantitative structure-activity relationship (QSAR) modeling in ligand-based drug discovery programs, pseudo-molecular field (PMF) descriptors using intrinsic atomic properties, namely, electronegativity and electron affinity are studied. In combination with partial least squares analysis and Procrustes transformation, these PMF descriptors were employed successfully to develop correlations that predict the activities of target protein inhibitors involved in various diseases (cancer, neurodegenerative disorders, HIV, and malaria). The results show that the present QSAR approach is competitive to existing QSAR models. In order to demonstrate the use of this algorithm, we present results of screening naturally occurring molecules with unknown bioactivities. The pIC(50) predictions can screen molecules that have desirable activity before assessment by docking studies.10adrug discovery10aelectron affinity10aElectronegativity10amolecular field descriptors10apartial least squares10aQSAR1 aKunde, Pushkar, D.1 aRamkumar, Sudha1 aKamble, Sanjay, P.1 aRaviKumar, Ameeta1 aKulkarni, Bhaskar, D.1 aKumar, Ravi  uhttps://library.ncl.res.in/content/use-electronegativity-and-electron-affinity-based-pseudo-molecular-field-descriptors01872nas a2200181   4500008004100000022001400041245008600055210006900141260000800210300001600218490000700234520123600241100002301477700002401500700002301524700002501547856011801572       2022                        eng d  a1144-054600aEnhanced anisole hydroxylation over a hierarchical micro/mesoporous TS-1 catalyst0 aEnhanced anisole hydroxylation over a hierarchical micromesoporo  cAUG  a14667-146750 v463 a<p>
	Hierarchical TS-1 materials were synthesized using hydrothermal synthesis and a post modification technique through desilication. They were evaluated for hydroxylation of anisole to produce industrially important chemicals, o-methoxyphenol (OMP) and p-methoxyphenol (PMP). The detailed characterization of the prepared catalysts, such as morphology, structure, nature of Ti and surface area were obtained by SEM, HR-TEM, XRD, UV-VIS spectroscopy and the BET technique. The effects of various operational parameters such as substrate/H2O2 molar ratio, reaction temperature, catalyst concentration and solvent effect on the hydroxylation of anisole have been studied in detail. The microporous TS-1 catalyst showed 32% anisole conversion with 34% selectivity to PMP, while the micro/mesoporous DTS-1 catalyst showed enhanced activity for anisole hydroxylation, i.e. 54% conversion with 55% selectivity towards PMP. The increased framework Ti and improved accessibility of the active sites located in the channels of DTS-1, which permit the mass transfer of reactants, transition states and products from the mesopores of DTS-1, were responsible for the enhanced catalytic activity and selectivity towards p-methoxyphenol.</p>
1 aPatil, Chetana, R.1 aNiphadkar, Prashant1 aKamble, Sanjay, P.1 aRode, Chandrashekhar  uhttps://library.ncl.res.in/content/enhanced-anisole-hydroxylation-over-hierarchical-micromesoporous-ts-1-catalyst02709nas a2200313   4500008004100000022001400041245011200055210006900167260000900236300001100245490000800256520169600264653001901960653001701979653001701996653002402013653001502037653001502052100002602067700001802093700002302111700002502134700001802159700001802177700002302195700002302218700002302241856013102264       2022                        eng d  a0048-969700aHigh throughput sequencing based direct detection of SARS-CoV-2 fragments in wastewater of Pune, West India0 aHigh throughput sequencing based direct detection of SARSCoV2 fr  cFEB   a1510380 v8073 aGiven a large number of SARS-CoV-2 infected individuals, clinical detection has proved challenging. The wastewater-based epidemiological paradigm would cover the clinically escaped asymptomatic individuals owing to the faecal shedding of the virus. We hypothesised using wastewater as a valuable resource for analysing SARS-CoV-2 mutations circulating in the wastewater of Pune region (Maharashtra; India), one of the most affected during the covid-19 pandemic. We conducted study in open wastewater drains from December 2020- March 2021 to assess the presence of SARS-CoV-2 nucleic acid and further detect mutations using ARTIC protocol of MinION sequencing. The analysis revealed 108 mutations across six samples categorised into 39 types of mutations. We report the occurrence of mutations associated with Delta variant lineage in March-2021 samples, simultaneously also reported as a Variant of Concern (VoC) responsible for the rapid increase in infections. The study also revealed four mutations; S:N801, S:C480R, NSP14:C279F and NSP3:L550del not currently reported from wastewater or clinical data in India but reported worldwide. Further, a novel mutation NSP13:G206F mapping to NSP13 region was observed from wastewater. Notably, S:P1140del mutation was detected in December 2020 samples while it was reported in February 2021 from clinical data, indicating the instrumentality of wastewater data in early detection. This is the first study in India to demonstrate utility of sequencing in wastewater based epidemiology to identify mutations associated with SARS-CoV-2 virus fragments from wastewater as an early warning indicator system. (c) 2021 Elsevier B.V. All rights reserved.10aARTIC protocol10aEpidemiology10aMetagenomics10aNanopore sequencing10aSARS-CoV-210awastewater1 aDharmadhikari, Tanmay1 aRajput, Vinay1 aYadav, Rakeshkumar1 aBoargaonkar, Radhika1 aPatil, Dhawal1 aKale, Saurabh1 aKamble, Sanjay, P.1 aDastager, Syed, G.1 aDharne, Mahesh, S.  uhttps://library.ncl.res.in/content/high-throughput-sequencing-based-direct-detection-sars-cov-2-fragments-wastewater-pune-west01750nas a2200241   4500008004100000022001400041245010900055210006900164260000800233300001500241490000600256520092800262653001001190653001101200653002401211653002801235653001701263100002301280700002901303700002301332700002501355856012801380       2022                        eng d  a2365-654900aHighly efficient chemoselective hydrogenation of 5-HMF to BHMF over reusable bimetallic Pd-Ir/C catalyst0 aHighly efficient chemoselective hydrogenation of 5HMF to BHMF ov  cJUN  ae2022004560 v73 a<p>
	Catalytic synergism was observed for a bimetallic Pd-Ir catalyst supported on activated carbon for chemoselective hydrogenation of 5-hydroxymetahyl furfural (5-HMF) to 2, 5-(bishydroxymethyl) furan (BHMF) with complete conversion and 97 % selectivity under very mild reaction conditions. The structural characterization like XRD, N-2 sorption, FE-SEM and TEM suggested formation of fine nanoparticles (1.95-3.08 nm) having very higher surface area, uniform distribution and mesoporous nature of the material. XPS spectra and Pyridine-IR spectroscopy revealed formation of Pd-PdO and Ir/IrO2/IrO3 interface on the catalytic surface along with strong Bronsted acidic sites which were responsible for high efficiency of catalyst at 80 degrees C, 100 psig H-2 pressure at 5-HMF/Catalyst=20 and within 2.5 h of reaction time. A plausible reaction mechanism is also elucidated based on structure activity correlation.</p>
10a5-HMF10aCarbon10aCatalytic synergism10aSelective hydrogenation10aValorization1 aRatrey, Geetanjali1 aSolanki, Bhanupratap, S.1 aKamble, Sanjay, P.1 aRode, Chandrashekhar  uhttps://library.ncl.res.in/content/highly-efficient-chemoselective-hydrogenation-5-hmf-bhmf-over-reusable-bimetallic-pd-irc01676nas a2200181   4500008004100000022001400041245010900055210006900164260000800233300001600241490000700257520101300264100002201277700002201299700002701321700002301348856012301371       2022                        eng d  a0888-588500aHydrodechlorination of 4-chloro-2-aminophenol into a recyclable product using Ni- and Cu-based catalysts0 aHydrodechlorination of 4chloro2aminophenol into a recyclable pro  cOCT  a14433-144450 v613 a<p>
	The 4-chloro-2-amino phenol (4C2AP) bearing wastewater is produced while manufacturing dyes and pharma-ceutical ingredients. Ni-and Cu-based cost-effective catalysts were developed, typically characterized, and subjected to hydrodechlori-nation (HDC) of 4C2AP. The role of reducing agents, concentration, pH of wastewater, presence of salt, reaction temperature, catalyst reuse, and the kinetics was investigated. A selective makeover of 2-amino phenol (2AP) was analyzed by HPLC, LCMS, and NMR. A complete HDC of 4C2AP with remarkable selectivity (98%) toward 2AP was achieved using a Ni0 catalyst and NaBH4 at room temperature. It is observed that the alkaline condition, the presence of salt, and a high reaction temperature favor the HDC process. A maximum of 1 g L-1 of the Ni0 loading is found to be sufficient to dechlorinate the pollutant. It can be concluded that the catalytic HDC is a technically viable and inexpensive process for the conversion of 4C2AP into a valuable product, 2AP.</p>
1 aShetty, Rohit, R.1 aRaut, Sandesh, S.1 aKulkarni, Prashant, S.1 aKamble, Sanjay, P.  uhttps://library.ncl.res.in/content/hydrodechlorination-4-chloro-2-aminophenol-recyclable-product-using-ni-and-cu-based02240nas a2200229   4500008004100000022001400041245014100055210006900196260000800265300001400273490000800287520141800295653001801713653001601731653002701747653001601774653001501790100002201805700002301827700002901850856013101879       2024                        eng d  a1011-372X00aNovel sulfonic acid functionalized silica supported isonicotinic acid catalyst for conversion of 2-methylfuran to diesel fuel precursors0 aNovel sulfonic acid functionalized silica supported isonicotinic  cAPR  a1511-15200 v1543 a<p>Polyfuranic compounds produced after carbon up-gradation of 2-methylfuran by acid catalyzed C-C bond forming reactions when undergo hydro-deoxygenation produce diesel fuel. Herein, we prepared a simple and novel silica supported sulfonic acid functionalized isonicotinic acid SO3H-INA@SiO2 catalyst by treating isonicotinic acid with chlorosulphonic acid followed by heterogenization on silica. This heterogeneous solid acid catalyst was explored for the solvent free conversion of 2-methylfuran to diesel fuel precursors of C-15 and C-20 units via tandem ring opening followed by condensation sequence. Under optimized reaction conditions, SO3H-INA@SiO2 was able to convert, 2-methylfuran completely into condensation products such as 5,5-bis(5-methylfuran-2-yl)pentan-2-one (1) and 2,4,4-tris(5-methylfuran-2-yl)pentan-1-ol (2) with 19% and 67% yields, respectively. The heterogeneous SO3H-INA@SiO2 catalyst was successfully recycled up to six consecutive runs without loss of its activity. The SO3H-INA@SiO2 catalyst offered superior activity as compared to the commercially available -SO3H functionalized resins. Superior activity of the prepared catalyst could be attributed for its higher acidity, smaller particle size and high surface area. Structure of the prepared catalyst was confirmed by FTIR and solid state NMR. Total acidity of the prepared catalyst was determined by acid-base titration.</p>
10a2-Methylfuran10aDiesel fuel10aheterogeneous catalyst10aIonic solid10asolid acid1 aTarade, Komal, P.1 aKamble, Sanjay, P.1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/novel-sulfonic-acid-functionalized-silica-supported-isonicotinic-acid-catalyst-conversion-202937nas a2200313   4500008004100000022001400041245007300055210006900128260000800197300001400205490000700219520198400226653001502210653002102225653002302246653001302269653003002282653000802312653002502320653002102345100001802366700002602384700002202410700002402432700002102456700002402477700002302501856009902524       2025                        eng d  a1083-616000aEfficient continuous catalytic process for production of bisphenol A0 aEfficient continuous catalytic process for production of bisphen  cOCT  a2530-25430 v293 a<p>
	Bisphenol A (BPA) is a versatile chemical compound that is essential for producing durable polycarbonate plastics and strong epoxy resins, which are integral to numerous everyday products. In the present study, BPA was prepared using phenol and acetone using a highly active and reusable ion-exchange resin (IER) Lewatit K1131S as the catalyst. Under optimized conditions, an acetone conversion of 84% and a BPA selectivity of 94% were achieved. The produced BPA was further purified, resulting in a 96% isolated yield with 99.5% purity. The reusability of Lewatit K1131S has been studied, and it was found that it can be reused multiple times without affecting the selectivity for BPA. The kinetics of the reaction was studied using the Langmuir-Hinshelwood model; it was found that the reaction follows pseudo-first-order kinetics, and the apparent activation energy was determined to be 12.7 kJ/mol. A continuous pilot scale process for the production of BPA using a fixed-bed reactor (packed with ion-exchange resin) has been developed. Pilot plant trials were conducted at different flow rates such as 200, 300, and 500 g/h, and a downstream processing methodology using an agitated thin film evaporator (ATFE) was employed for the BPA purification. This resulted in high throughput, producing 99.2% isolated BPA yield with 99.5% HPLC purity. Additionally, the robustness and viability of the catalyst were assessed at a flow rate of 200 g/h, producing 22.5 kg of BPA per kg of catalyst, highlighting its cost-effectiveness, stability, and resistance to deactivation, which shows its suitability for industrial-scale applications. The environmental viability of the process was further evaluated by using the E-factor and Process Mass Intensity (PMI) metrics. The estimated E-factor was 0.3118, while the corresponding PMI was 1.3935. These lower values indicate reduced waste generation, improved material efficiency, and enhanced sustainability of the process.</p>
10abisphenolA10aBPA purification10aContinuous process10aE-factor10aion-exchange resins (IER)10aPMI10aprocess optimization10areactionkinetics1 aDhotre, Kapil1 aPatil, Chetana, Rupak1 aTarade, Komal, P.1 aMarkandeya, Nishant1 aPathak, Abhishek1 aBhongale, Sunil, S.1 aKamble, Sanjay, P.  uhttps://library.ncl.res.in/content/efficient-continuous-catalytic-process-production-bisphenol02995nas a2200169   4500008004100000022001400041245013200055210006900187260000900256300001400265490000700279520234600286100001802632700002202650700002302672856013002695       2026                        eng d  a0888-588500aCondensation of bioderived guaiacol with acetaldehyde for the synthesis of bisguaiacol-E: a biobased alternative to bisphenol-A0 aCondensation of bioderived guaiacol with acetaldehyde for the sy  cAPR   a6968-69790 v653 a<p>
	Bisguaiacol-E (BGE) has emerged as a biobased and sustainable alternative to bisphenol-A (BPA) for the production of materials intended for direct contact with humans and animals, including baby feeding bottles and food packaging. In the present study, BGE was synthesized from bioderived guaiacol and acetaldehyde via acid-catalyzed condensation using a highly efficient and reusable ion-exchange resin, Purolite C124SH. Under optimized conditions, the process achieved 96% guaiacol conversion with 100% selectivity toward BGE. The crude product was purified to obtain BGE in 95% isolated yield and 100% purity. The reusability of Purolite C124SH was evaluated over multiple reaction cycles. After five consecutive reuse cycles, guaiacol conversion and BGE selectivity declined by approximately 25-26% and 20-22%, respectively. However, after regeneration by methanol treatment, the catalyst recovered its activity and maintained a consistent performance over the subsequent three cycles. These results demonstrate the catalyst's regenerability, robustness, and resistance to deactivation, highlighting its potential for cost-effective industrial application. The kinetic study indicates that the condensation of acetaldehyde with guaiacol to form BGE over the Purolite C124SH resin catalyst can be described by a pseudohomogeneous kinetic model. The reaction follows apparent pseudo-first-order behavior, with an activation energy of 43.5 kJ mol-1, suggesting a minimal contribution from external mass-transfer limitations under the investigated conditions. Moreover, at the optimized reaction conditions, the estimated space-time yield (STY) was 0.42 kg L-1 h-1, corresponding to an apparent reaction rate constant of 0.5 h-1. Furthermore, the physicochemical properties of the synthesized BGE were compared with those of reported BGF (Bisguaiacol-F) and BPA, showing strong alignment and confirming its applicability as a safer substitute. The environmental performance of the process was assessed using green chemistry metrics. The calculated E-factor (0.2) and Process Mass Intensity (PMI - 1.27) indicate low waste generation, high material efficiency, and improved sustainability. Overall, the developed methodology offers a clean, efficient, and scalable route for producing BGE as a viable biobased replacement for BPA.</p>
1 aDhotre, Kapil1 aTarade, Komal, P.1 aKamble, Sanjay, P.  uhttps://library.ncl.res.in/content/condensation-bioderived-guaiacol-acetaldehyde-synthesis-bisguaiacol-e-biobased-alternative