02393nas a2200253 4500008004100000022001400041245010600055210006900161260007300230300001200303490000700315520145300322653003101775653002801806653002201834653002201856653002001878100002901898700001801927700001401945700002801959700002601987856012602013 2007 eng d a1387-181100aSynthesis and characterization of mesoporous carbon through inexpensive mesoporous silica as template0 aSynthesis and characterization of mesoporous carbon through inex aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJAN a189-1990 v983 a

Mesoporous silica materials have been synthesized through sol-gel reaction using inexpensive sodium silicate as source of silica and low cost hydroxy carboxylic acid compounds as templates/pore forming agents. The material measured surface area of 1014 m(2)/g, pore diameter of 65 angstrom and pore volume of 1.4 cc/g when parameters like time and temperature of synthesis along with mole ratio of TA/SiO(2) were optimized. Here TA stands for tartaric acid. Carbonization of sucrose inside the pores of above silica material at 900 degrees C followed by removal of silica framework using aqueous ethanoic solution of NaOH gave rise to mesoporous carbon material. The resulting materials were characterized by N(2)-sorption, FTIR spectroscopy, X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, thermal analysis and cyclic voltammetry. Three dimensional interconnecting wormhole channel arrangement of mesoporous silica template leads to mesoporous carbon replica with surface area of 1200 m(2)/g. X-ray photoelectron spectroscopic study (XPS) of the mesoporous carbon material shows the concentration of carbon atom in the range of 97-98% with 1-2% oxygen and negligible amount of silica. The electrochemical double layer capacitance behavior of carbon material with the specific capacitance value of 88.0 F/g at the scan rate of 1 mV/s appears to be promising. (C) 2006 Elsevier Inc. All rights reserved.

10aElectrochemical properties10ahydroxy carboxylic acid10amesoporous carbon10aMesoporous silica10asodium silicate1 aKarandikar, Prashant, R.1 aPatil, K., R.1 aMitra, A.1 aKakade, Bhalchandra, A.1 aChandwadkar, Asha, J. uhttps://library.ncl.res.in/content/synthesis-and-characterization-mesoporous-carbon-through-inexpensive-mesoporous-silica02106nas a2200253 4500008004100000022001400041245019400055210006900249260007300318300001200391490000800403520111100411653002601522653002201548653001701570653001401587100001601601700002501617700002101642700002401663700001901687700001801706856012801724 2009 eng d a1381-116900aCatalytic meerwein-ponndorf-verley reductions over mesoporous silica supports: rational design of hydrophobic mesoporous silica for enhanced stability of aluminum doped mesoporous catalysts0 aCatalytic meerweinponndorfverley reductions over mesoporous sili aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAR a118-1260 v3013 a

A series of aluminum isopropoxide-grafted mesoporous organosilica having ethane (-CH(2)-CH(2)-) and ethene (-CH=CH-) groups in the frame wall positions (ethane-silica, ethene-silica) as well as mesoporous silicas (MCM-41, MCM-48. SBA-15) through siloxide linkages were fabricated. The samples were used as catalysts in the Meerwein-Ponndorf-Verley reduction of ketones and aldehydes of different nature and size using secondary alcohols as the hydrogen transfer agents. Aluminum isopropoxide supported mesoporous silica samples show higher catalytic conversion and among them, the one-dimensionally channel oriented Si-MCM-41 supported aluminum isopropoxide shows better results than the three-dimensional Si-MCM-48 and the large pore Si-SBA-15. Compared to aluminum isopropoxide-grafted mesoporous silica samples, aluminum alkoxide-grafted organosilica samples shows better catalytic activity even in the presence of 10% of water and the better stability is attributed to the presence of integrated hydrophobic organic groups in the frame wall positions. (C) 2008 Elsevier B.V. All rights reserved.

10aAluminum isopropoxide10aMesoporous silica10aOrganosilica10areduction1 aShylesh, S.1 aKapoor, Mahendra, P.1 aJuneja, Lekh, R.1 aSamuel, Prinson, R.1 aSrilakshmi, Ch1 aSingh, A., R. uhttps://library.ncl.res.in/content/catalytic-meerwein-ponndorf-verley-reductions-over-mesoporous-silica-supports-rational-001953nas a2200241 4500008004100000022001400041245012100055210006900176260007300245300001000318490000800328520104500336653002201381653001801403653003301421653002201454653002701476100001701503700001901520700001701539700002801556856012701584 2009 eng d a0926-860X00aOxidative kinetic resolution of alcohols using chiral Mn-salen complex immobilized onto ionic liquid modified silica0 aOxidative kinetic resolution of alcohols using chiral Mnsalen co aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcFEB a17-250 v3543 a

The supported ionic liquid strategy has been applied for the immobilization of chiral Mn(III) salen complex onto ionic liquid modified silica. Chiral Mn(III) salen complex was immobilized over silica through a thin film of covalently anchored imidazolium ionic liquid. These catalysts were characterized by N(2) sorption, XRD, MR, DRUV-vis, and elemental analysis. The results showed that the chiral Mn(III) salen complex could be successfully immobilized onto the modified mesoporous materials and that the long-range mesoporous ordering of parent supports was maintained after the immobilization. The immobilized catalyst provided good enantioselectivity and activity in the heterogeneous catalysis of the oxidative kinetic resolution of secondary alcohol and can be recovered and recycled for four times without obvious loss of enantioselectivity and activity. Oxidative kinetic resolutions of meso-diols, hydroxyl ester and primary alcohol were also studied using this catalyst system. (C) 2008 Elsevier B.V. All rights reserved.

10aMesoporous silica10aMn(III) salen10aOxidative kinetic resolution10aSecondary alcohol10aSupported ionic liquid1 aSahoo, Suman1 aKumar, Pradeep1 aLefebvre, F.1 aHalligudi, Shivaraj, B. uhttps://library.ncl.res.in/content/oxidative-kinetic-resolution-alcohols-using-chiral-mn-salen-complex-immobilized-ionic-001780nas a2200217 4500008004100000022001400041245006500055210006500120260006800185300001200253490000600265520104800271653001201319653001401331653001701345653002201362653002901384100002101413700002901434856009901463 2009 eng d a1527-899900aSustainable green catalysis by supported metal nanoparticles0 aSustainable green catalysis by supported metal nanoparticles a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcAUG a224-2350 v93 a

The recent progress of sustainable green catalysis by supported metal nanoparticles is described. The template synthesis of metal nanoparticles in ordered porous materials is studied for the rational design of heterogeneous catalysts capable of high activity and selectivity. The application of these materials in green catalytic processes results in a unique activity and selectivity arising from the concerted effect of metal nanoparticles and supports. The high catalytic performances of Pt nanoparticles in mesoporous silica is reported Supported metal catalysts have also been applied to biomass conversion by heterogeneous catalysis Additionally, the degradation of cellulose by supported metal catalysts, in which bifunctional catalysis of acid and metal plays the key role for the hydrolysis and reduction of cellulose, is also reported. (C) 2009 The Japan Chemical Journal Forum and Wiley Periodicals, Inc. Chem Rec 9: 224-235: 2009: Published online in Wiley InterScience (www.intersciencewiley.corn) DOI 10.1002/tcr.200900004

10aBiomass10acellulose10aCO oxidation10aMesoporous silica10asupported metal catalyst1 aFukuoka, Atsushi1 aDhepe, Paresh, Laxmikant uhttps://library.ncl.res.in/content/sustainable-green-catalysis-supported-metal-nanoparticles-001662nas a2200265 4500008004100000022001400041245015200055210006900207260009500276300001200371490000800383520066000391653002301051653002201074653002201096653001301118653001501131653002701146653001301173100001701186700001901203700001701222700002801239856012901267 2009 eng d a0021-951700aSynthesis of chiral sulfoxides by enantioselective sulfide oxidation and subsequent oxidative kinetic resolution using immobilized Ti-binol complex0 aSynthesis of chiral sulfoxides by enantioselective sulfide oxida a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcFEB a111-1180 v2623 a

Chiral Ti-binol complex was immobilized onto ionic liquid modified SBA-15 and characterized by different physicochemical techniques. The catalyst was found to be highly enantioselective in the heterogeneous asymmetric oxidation of prochiral sulfides to sulfoxides and subsequent oxidative kinetic resolution of the sulfoxides using aqueous tert-butylhydroperoxide as the oxidant. A positive non-linear effect was observed in the oxidation-kinetic resolution of thioanisole using this supported catalyst. The supported catalyst was reused in multiple catalytic runs without any loss of enantioselectivity. (C) 2008 Elsevier Inc. All rights reserved.

10aKinetic resolution10aMesoporous silica10aNon-linear effect10aSulfides10aSulfoxides10aSupported ionic liquid10aTi-binol1 aSahoo, Suman1 aKumar, Pradeep1 aLefebvre, F.1 aHalligudi, Shivaraj, B. uhttps://library.ncl.res.in/content/synthesis-chiral-sulfoxides-enantioselective-sulfide-oxidation-and-subsequent-oxidative-001755nas a2200217 4500008004100000022001400041245013600055210006900191260007300260300001200333490000800345520092800353653001401281653002201295653001901317653001601336100001901352700002401371700001801395856012401413 2010 eng d a0926-860X00aNature of the acid sites in the metal triflates immobilized in SBA-15 and their role in the friedel-crafts acylation of naphthalene0 aNature of the acid sites in the metal triflates immobilized in S aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJAN a130-1370 v3723 a

The Zn-triflate molecules loaded (5-30 mol%) in mesoporous SBA-15 silicate exhibited considerably higher catalytic activity for liquid-phase Friedel-Crafts (FC) acylation of naphthalene with p-toluoyl chloride, as compared to the corresponding triflates of La, Ce and Y. In situ FTIR studies revealed that the triflate molecules occluded in the channels of SBA-15 may cause severe perturbation of surface hydroxyl groups, without undergoing an electronic binding. The metal cations of the triflate molecules, on the other hand, participated in direct bonding of the reactant molecules and also helped in the formation of some Bronsted type surface acid sites. This article discusses the role of the acid sites generated on occlusion of metal triflates in SBA-15, as monitored by using NH(3)-TPD and pyridine-IR spectroscopy, in the Friedel-Crafts acylation of naphthalene. (C) 2009 Elsevier B.V. All rights reserved.

10aAcylation10aMesoporous silica10aMetal triflate10aNaphthalene1 aSelvakumar, S.1 aGupta, Narendra, M.1 aSingh, A., P. uhttps://library.ncl.res.in/content/nature-acid-sites-metal-triflates-immobilized-sba-15-and-their-role-friedel-crafts-001892nas a2200229 4500008004100000022001400041245013700055210006900192260009600261300001000357490000800367520100900375653001301384653002601397653001401423653002201437653001501459100001701474700001901491700002001510856013201530 2010 eng d a1022-136000aUltrasound-triggered release of ibuprofen from a chitosan-mesoporous silica composite - a novel approach for controlled drug release0 aUltrasoundtriggered release of ibuprofen from a chitosanmesoporo aPO BOX 10 11 61, D-69451 WEINHEIM, GERMANYbInt Union Pure & Appl Chem; German Res FdncJAN a80-880 v2873 a

In this work, an attempt was made to synthesize a novel Chitosan-Mesoporous silica (CS-MS) hybrid composite to design a drug delivery system based on ultrasound triggered stimuli-responsive smart release. The in-vitro drug release properties of both the Mesoporous Silica (MS) and Chitosan (CS) hybrids were investigated. Ibuprofen (Ibu) was used as a model drug. The results from powder X-Ray diffraction (XRD) patterns, and BET N(2) adsorption isotherms exhibited that MS can accommodate drug molecules into the lumen of the channels and pores. Drug release, stimulated by temperature and pH of the release media was also investigated. We studied the Ultrasound (US) triggered release of Ibu in a simulated body fluid (pH 7.4). The results exhibited that US can be used as a non-invasive technique for drug release from polymeric materials. The enhancing effect of ultrasound on drug release is due to the Cavitation effect, without causing any significant destruction on the polymer morphology.

10aChitosan10adrug delivery systems10aibuprofen10aMesoporous silica10aUltrasound1 aDepan, Dilip1 aSaikia, Lakshi1 aSingh, Raj, Pal uhttps://library.ncl.res.in/content/ultrasound-triggered-release-ibuprofen-chitosan-mesoporous-silica-composite-novel-approach-001922nas a2200229 4500008004100000022001400041245014000055210006900195260007300264300001000337490000800347520104900355653001701404653002201421653002201443653002001465100002201485700001701507700002401524700001801548856012601566 2011 eng d a0926-860X00aIn situ encapsulation of Pt nanoparticles in mesoporous silica: synthesis, characterisation and effect of particle size on CO oxidation0 aIn situ encapsulation of Pt nanoparticles in mesoporous silica s aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAUG a91-970 v4033 a

Pt nanoparticles of narrow size distribution and average particle size of 4.4 nm are isolated exclusively inside SBA-12 mesoporous silica by a novel in situ method. The interaction of Pt precursor with surfactant-polymer composite micelle is followed by NMR and UV studies. The final Pt incorporated silica material is characterised by XRD, TEM and N(2) adsorption. The mesoporous nature of the silica is found to be intact after Pt incorporation without any pore blockage. CO oxidation activity of this material is compared with that of mesoporous silica incorporating different sizes of Pt viz., 1.8, 3.6 and 8 nm. Activation energies of CO oxidation for all these materials are calculated by a simple differential method based on first principles. A comparison of activation energies and single site yields reveals that these parameters are distinguishably less in catalyst containing 1.8 nm Pt nanoparticles but more or less same in catalysts containing 3.6, 4.4 and 8 nm Pt nanoparticles. (C) 2011 Elsevier B.V. All rights reserved.

10aCO oxidation10aIn situ synthesis10aMesoporous silica10aPt nanoparticle1 aPrashar, Atul, K.1 aMayadevi, S.1 aRajamohanan, P., R.1 aDevi, Nandini uhttps://library.ncl.res.in/content/situ-encapsulation-pt-nanoparticles-mesoporous-silica-synthesis-characterisation-and-002363nas a2200229 4500008004100000022001400041245008400055210006900139260007500208300001200283490000700295520151500302653003501817653003101852653001901883653002201902653003301924100001701957700002001974700002801994856011102022 2011 eng d a1571-101300aOrdered mesoporous silica as supports in the heterogeneous asymmetric catalysis0 aOrdered mesoporous silica as supports in the heterogeneous asymm a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGER/PLENUM PUBLISHERScSEP a200-2140 v153 a

Enantioselective synthesis of organic compounds has been studied by homogeneous catalysts for several years. However, these catalysts have yet to make a significant impact on industrial scales for fine chemical synthesis. A primary reason is the designing of a homogeneous asymmetric catalyst, which requires relatively bulky ligands and catalyst recovery and recycling often causes problems. One of the convincing ways to overcome this problem is to immobilise the asymmetric catalyst onto a solid support and the resulting heterogeneous asymmetric catalyst system can, in principle, be readily re-used. A large number of supports such as inorganic oxides including zeolites, alumina, zirconia, silica and organic polymers have been employed as supports in heterogeneous asymmetric catalysis. Therefore, in this review article we have summarized the work done by us in our laboratory on the immobilization of chiral transition metal complexes such as Ru, Ir, Mn and Ti onto ordered mesoporous silica and its asymmetric catalysis. All these immobilized catalysts were well characterized by different physicochemical techniques to confirm the structural retention of the support as well as the active metal complex after immobilization. This report includes our asymmetric catalytic investigations in enantioselective reactions such as hydrogenation of ketones, olefins, oxidation of sulfides and oxidative kinetic resolution of alcohols and sulfoxides through immobilized heterogeneous catalyst systems.

10aEnantioselective hydrogenation10aEnantioselective oxidation10aImmobilization10aMesoporous silica10aOxidative kinetic resolution1 aSahoo, Suman1 aBordoloi, Ankur1 aHalligudi, Shivaraj, B. uhttps://library.ncl.res.in/content/ordered-mesoporous-silica-supports-heterogeneous-asymmetric-catalysis-001696nas a2200253 4500008004100000022001400041245011300055210006900168260007300237300001000310490000700320520076400327653001001091653003101101653003301132653002101165653002201186653002101208653002801229100002201257700001701279700001801296856012801314 2012 eng d a1566-736700aEffect of particle size on selective hydrogenation of cinnamaldehyde by Pt encapsulated in mesoporous silica0 aEffect of particle size on selective hydrogenation of cinnamalde aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcNOV a42-460 v283 a

Pt nanoparticles of various sizes, viz. 8. 4.9, 3.6 and 1.8 nm were encapsulated in 2D hexagonal mesoporous silica by in-situ synthesis as well as post synthetic modifications so that the final catalyst composition was <= 1 wt.% Pt/SiO2. A kinetic analysis of the effect of particle size on selective hydrogenation of cinnamaldehyde was carried out on these catalysts. It was found that the materials, even at such low loading of Pt, were very active for the hydrogenation and selective for the desired product, cinnamyl alcohol. Among the different particle sizes, selectivity was found to be the highest on 8 nm particles. Kinetic analysis shows that the reaction follows a consecutive reaction pathway. (C) 2012 Elsevier B.V. All rights reserved.

10aalpha10abeta-Unsaturated aldehydes10aCinnamaldehyde hydrogenation10aKinetic analysis10aMesoporous silica10aPt nanoparticles10aSelective hydrogenation1 aPrashar, Atul, K.1 aMayadevi, S.1 aDevi, Nandini uhttps://library.ncl.res.in/content/effect-particle-size-selective-hydrogenation-cinnamaldehyde-pt-encapsulated-mesoporous-001485nas a2200217 4500008004100000022001400041245012600055210006900181260007300250300001200323490000800335520066500343653001001008653001801018653002201036653002301058100001801081700002401099700001801123856012601141 2012 eng d a1387-181100aIn situ encapsulation of ultra small ceria nanoparticles stable at high temperatures in the channels of mesoporous silica0 aIn situ encapsulation of ultra small ceria nanoparticles stable  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUN a215-2190 v1553 a

Ultra small ceria nanoparticles of sizes <2 nm stable at 500 degrees C are encapsulated in the channels of mesoporous silica by employing a novel method of synthesis. The method involves modifying non-ionic polymer templates with ionic surfactants to enhance anchoring of metal ion precursors. In this way, further silica wall formation around the template ensures isolation of the nanoparticles exclusively within the channels after template removal by heat treatment. Further understanding of the interaction of the composite template system and cerium precursor is gained by cyclic voltammetric studies. (C) 2012 Elsevier Inc. All rights reserved.

10aceria10aEncapsulation10aMesoporous silica10aTemplate synthesis1 aGhosh, Sumona1 aJijil, Chamundi, P.1 aDevi, Nandini uhttps://library.ncl.res.in/content/situ-encapsulation-ultra-small-ceria-nanoparticles-stable-high-temperatures-channels-001511nas a2200229 4500008004100000022001400041245008800055210006900143260007300212300001000285490000800295520067000303653002200973653001700995653001901012653002201031100002501053700003301078700003001111700001801141856012201159 2012 eng d a0920-586100aSimple one pot synthesis of nano gold-mesoporous silica and its oxidation catalysis0 aSimple one pot synthesis of nano goldmesoporous silica and its o aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcDEC a92-970 v1983 a

A simple one pot synthesis strategy using a non ionic triblock copolymer P123 as reducing as well as templating agent has been employed to prepare nano gold particles incorporated in the pores of mesoporous silica catalyst. The catalyst is characterized by XRD, nitrogen adsorption desorption isotherms at 77 K and TEM. The presence of small gold nanopartilces (similar to 2-4 nm) clearly demonstrated that this strategy can be effective in incorporating Au inside mesochannels. The catalyst reduced at 300 degrees C in H-2 was found to be active for oxidation reactions, such as CO oxidation, and benzyl alcohol. (C) 2012 Elsevier B. V. All rights reserved.

10aAlcohol oxidation10aCO oxidation10aGold catalysis10aMesoporous silica1 aSekhar, A., C. Sunil1 aSivaranjani, Kumarsrinivasan1 aGopinath, Chinnakonda, S.1 aVinod, C., P. uhttps://library.ncl.res.in/content/simple-one-pot-synthesis-nano-gold-mesoporous-silica-and-its-oxidation-catalysis-002091nas a2200241 4500008004100000022001400041245010400055210006900159260007300228300001200301490000800313520120800321653001201529653001801541653003001559653002201589653002401611653001801635100001901653700002401672700002101696856013201717 2016 eng d a1381-116900aCatalytic decarboxylation of non-edible oils over three-dimensional, mesoporous silica-supported Pd0 aCatalytic decarboxylation of nonedible oils over threedimensiona aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUN a126-1340 v4173 a

Deoxygenation of fatty acids (oleic and stearic acids) and non-edible oil (jatropha oil) over Pd(1-5 wt%) supported on two structurally different, three-dimensional, mesoporous silica (SBA-12 and SBA-16) catalysts was investigated. Pd/SBA-16 (cubic mesoporous structure with space group Im (3) over barm) showed higher catalytic activity than Pd/SBA-12 (hexagonal mesoporous structure with space group p6(3)/mmc). The influence of reaction parameters like temperature, H-2 pressure and Pd content as well as the nature of the feedstock on catalytic activity and product selectivity was studied. A temperature of above 320 degrees C, reaction time of 5 h and Pd content (on silica surface) of 3 wt% enabled complete conversion of the fatty compounds into diesel-range hydrocarbons. Deoxygenation proceeded through hydrodeoxygenation and decarboxylation mechanisms when a saturated (stearic) acid was used as a feed while it advanced mainly through decarboxylation route when an unsaturated (oleic) acid was employed. Higher surface hydrophobicity and smaller size particles of Pd are the possible causes for the superior catalytic activity of Pd/SBA-16. (C) 2016 Elsevier B.V. All rights reserved.

10aBiofuel10aDeoxygenation10aDiesel-range hydrocarbons10aMesoporous silica10aSupported palladium10aVegetable oil1 aRaut, Ravindra1 aBanakar, Vikram, V.1 aDarbha, Srinivas uhttps://library.ncl.res.in/content/catalytic-decarboxylation-non-edible-oils-over-three-dimensional-mesoporous-silica-supported02260nas a2200229 4500008004100000022001400041245015300055210006900208260000800277520139800285653001801683653002101701653001901722653002301741653002201764653002201786100002101808700002901829700002601858700002301884856012301907 2020 eng d a1380-222400aSynthesis, characterization and catalytic study of mesoporous carbon materials prepared via mesoporous silica using non-surfactant templating agents0 aSynthesis characterization and catalytic study of mesoporous car cNOV3 a

Mesostructured silica materials with surface area in the range of similar to 700-900 m(2)/g have been prepared using hydroxy-carboxylic acid compounds such as tartaric acid, malic acid and citric acid (low cost non-surfactant template/pore forming agents) and tetraethylorthosilicate (TEOS) as silica source by sol-gel reaction. The templates were removed by either soxhlet extraction or calcination method. Mesoporous carbon molecular sieves were then prepared by carbonizing sucrose inside the pores of the above prepared mesoporous silica using sulfuric acid as a catalyst. The materials were characterized by FTIR spectroscopy, powder X-ray diffraction (XRD), N-2-sorption studies, microanalysis, thermal analysis and transmission electron microscopy (TEM). The resulting carbon material shows relatively higher surface area (similar to 1100 m(2)/g), narrow pore size distribution and pore diameter of 4-5 nm. The mesoporosity of carbon material arises from interconnecting channels arrangements of mesoporous silica template. The mesoporous carbon material was used as a support for the immobilization of rhodium complex [HRhCO(TPPTS)(3)] by ossification method. The prepared catalyst has been tested for the hydroformylation of higher olefins. The activity of the catalyst was improved by 20-30% as compared to the catalyst prepared from a conventional activated carbon support.

10aCarbonization10aHydroformylation10aImmobilization10aLow cost templates10amesoporous carbon10aMesoporous silica1 aPagar, Nitin, S.1 aKarandikar, Prashant, R.1 aChandwadkar, Asha, J.1 aDeshpande, Raj, M. uhttps://library.ncl.res.in/content/synthesis-characterization-and-catalytic-study-mesoporous-carbon-materials-prepared01825nas a2200205 4500008004100000022001400041245011600055210006900171260000800240300001200248490000700260520109500267653003001362653002201392653002101414653003001435100001901465700000501484856013001489 2021 eng d a0934-086600aAmphifunctional mesoporous silica nanoparticles with ``molecular gates'' for controlled drug uptake and release0 aAmphifunctional mesoporous silica nanoparticles with molecular g cDEC a21001850 v383 aIt is demonstrated that the uptake and release of hydrophobic drugs/dyes by mesoporous silica nanoparticles (MSN) is critically dependent on the functional groups present on their outer surfaces. For this, amphifunctional MSNs are synthesized, possessing hydrophobic pores and hydrophilic functional groups on the outer surface. Further, the outer surface is modified with a different chain length of molecules, e.g., propargyl alcohol, triethylene glycol, and PEG (2000) via azide-alkyne click chemistry. The effect of these different surface functional groups on uptake of drug/dye is demonstrated with Nile red, proflavine (free base form), and rhodamine 6G. The uptake of these molecules is found to be inversely proportional to the bulkiness of surface functionality. To counter this effect, an alternate method of loading is proposed and demonstrated. Finally, the effect of these different functional groups on the release of loaded drug proflavine is studied, which supports the hypothesis that bulkier outer surface groups also hinder the release of drugs loaded in the porous MSN.10adrug delivery and release10aMesoporous silica10amolecular gating10asurface functionalization1 aShinde, Pravin1 a uhttps://library.ncl.res.in/content/amphifunctional-mesoporous-silica-nanoparticles-molecular-gates-controlled-drug-uptake-and02760nas a2200277 4500008004100000022001400041245013500055210006900190260000800259300001100267490000800278520181800286653001502104653001802119653001502137653002402152653002202176653001202198100001802210700003002228700002502258700001902283700002302302700002502325856013202350 2022 eng d a1387-181100aHybrid material for ferric ion detection & remediation: exceptional selectivity & adsorption capacity with biological applications0 aHybrid material for ferric ion detection remediation exceptional cJUN a1119450 v3383 a

In this work, naphthalimide derived functionalized silica material SiO2@NAPIA (2,2'((((propylazanediyl)bis (methylene))bis(2,1-phenylene))bis(oxy))bis(N-(1,3-dioxo-1H-benzo[de]i soquinoline-2(3H)-yl)acetamide)) was constructed as a dual signaling and remediation material for ferric ions from a pool of 35 common ions (cations and anions) in the aqueous system. The material Cubic SiO2 shows a high surface area (1104 m2/g, pore volume (1.510 cm3/g), and pore diameter (6.3 nm) in the mesoporous range, which reduces further on functionalization to get the final material SiO2@NAPIA. The ferric ion selectivity through fluorescence quenching displays a SternVolmer quenching constant (Ksv) of 7.8 x 108 M-1 with a LOD (Limit of detection) value of 0.11 mu M for ferricion, which is 48 times lower than the USEPA (United States Environmental Protection Agency) maximum contaminant level (5.35 mu M) in drinking water. This material also shows a very high adsorption capacity (664 mg/g) for ferric ions fitting the Langmuir model isotherm with R2 = 0.99, which can be easily stripped out, and the material can be recycled. This material was also used as a sensory probe material for biosensing of ferric ions through fluorescence imaging in living organisms like Artemia salina and quantification in the real environmental sample. Furthermore, the antibacterial activity inspired by the ferric ion chelating affinity shows good potency against several Gram-negative and Gram-positive bacterial strains. The Minimum Inhibitory Concentration (MIC) & Minimal Bactericidal Concentration (MBC) of the material against these pathogens were found to be 100 & 200 mu g/mL respectively. This material signifies superior activity with respect to the ferric-ion selective materials known in the literature.

10aAdsorption10aAntibacterial10aBiosensing10aFunctional material10aMesoporous silica10asensing1 aYadav, Sanjay1 aRajpurohit, Dushyantsingh1 aDash, Soumya, Ranjan1 aBhojani, Gopal1 aChatterjee, Shruti1 aPaital, Alok, Ranjan uhttps://library.ncl.res.in/content/hybrid-material-ferric-ion-detection-remediation-exceptional-selectivity-adsorption-capacity03141nas a2200253 4500008004100000022001400041245011700055210006900172260000900241300001600250490000700266520227500273653002302548653001902571653002402590653001702614653001202631653002202643653001802665653002902683100002102712700002702733856012702760 2023 eng d a1944-824400aEffective distribution of gold nanorods in ordered thick mesoporous silica: a choice of noninvasive theranostics0 aEffective distribution of gold nanorods in ordered thick mesopor cOCT  a47615-476270 v153 a

Porous silica coated gold nanorod core-shell structures demonstrate a multifunctional role in bioimaging, drug delivery, and cancer therapeutics applications. Here, we address a new approach for effective distribution of gold nanorods (GNRs) in a mesoporous silica (MS) shell, viz., one nanorod in one silica particle (GMS). We have studied that silica coating presents major advantages for the better biocompatibility and stability of GNRs. In this study, two different thicknesses of silica shell over GNRs have been discussed as per the application's need; GNRs in thin silica (11 nm) are fit for phototherapy and bioimaging, whereas thick and porous silica (51 nm) coated gold nanorods are suitable for triggered drug delivery and theranostics. However, effective distribution of GNRs in ordered architecture of thick mesoporous silica (MS, more than 50 nm thickness) with high surface area (more than 1000 m(2)/g) is not well understood so far. Here, we present methodical investigations for uniform and highly ordered mesoporous silica coating over GNRs with tunable thickness (6 to 51 nm). Judicious identification and optimization of different reaction parameters like concentrations of silica precursor (TEOS, 1.85-43.9 mM), template (CTAB, 0.9-5.7 mM), effect of temperature, pH (8.6-10.8), stirring speed (100-400 rpm), and, most importantly, the mode of addition of TEOS with GNRs have been discussed. Studies with thick, porous silica coated GNRs simplify the highest ever reported surface area (1100 m(2)/g) and cargo capacity (57%) with better product yield (g/batch). First and foremost, we report a highly scalable (more than 500 mL) and rapid direct deposition of an ordered MS shell around GNRs. These engineered core-shell nanoparticles demonstrate X-ray contrast property, synergistic photothermal-chemotherapeutics, and imaging of tumor cell (96% cell death) due to released fluorescent anticancer drug molecules and photothermal effect (52 degree celsius) of embedded GNRs. A deeper insight into their influence on the architectural features and superior theranostics performances has been illustrated in detail. Hence, these findings indicate the potential impact of individual GMS for image guided combination therapeutics of cancer.

10aCombinationTherapy10aContrast Agent10aCore-ShellStructure10aGoldNanorods10aImaging10aMesoporous silica10aNanoparticles10aTheranosticsIntervention1 aPrasad, Rajendra1 aSelvaraj, Kaliaperumal uhttps://library.ncl.res.in/content/effective-distribution-gold-nanorods-ordered-thick-mesoporous-silica-choice-noninvasive