01523nas a2200265   4500008004100000022001400041245005500055210005300110260009500163300001200258490000800270520066200278653001400940653002300954653002600977653002401003653002801027653001601055100002201071700001501093700001701108700002401125700001901149856008901168       2005                        eng d  a0021-951700aRearrangement of allyl phenyl ether over Al-MCM-410 aRearrangement of allyl phenyl ether over AlMCM41  a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcJAN  a105-1130 v2293 a<p>Claisen rearrangement of allyl phenyl ether to o-allylphenol and a dihydrobenzofuran derivative was investigated over MCM-41 with different Si/Al ratios. Higher aluminum content, higher reaction temperatures, and longer run duration favor the formation of the ring compound 2,3-dihydro-2-methyl benzofuran. There is a close relationship between acidity and conversion, which suggests that the reaction occurs inside the large pores of MCM-41. The influence of temperature and catalyst Si/Al ratio on the reaction are examined by kinetic analysis, under the assumption of a first-order consecutive reaction. (C) 2004 Elsevier Inc. All rights reserved.</p>10aAl-MCM-4110aallyl phenyl ether10aClaisen rearrangement10aMesoporous material10amolecular rearrangement10aSolid acids1 aMathew, Nevin, T.1 aKhaire, S.1 aMayadevi, S.1 aJha, Ratnesh, Kumar1 aSivasanker, S.  uhttps://library.ncl.res.in/content/rearrangement-allyl-phenyl-ether-over-al-mcm-41-001904nas a2200289   4500008004100000022001400041245006600055210006000121260007300181300001000254490000800264520102300272653001501295653001501310653001301325653001301338653001101351653001701362653002201379100001801401700002801419700002201447700001301469700002201482700001801504856009201522       2006                        eng d  a0927-775700aAdsorption of methanol on Si(100)/SiO(2)and mesoporous SBA-150 aAdsorption of methanol on Si100SiO2and mesoporous SBA15  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcSEP  a51-580 v2873 a<p>Adsorption of methanol on SiO(100)/SiO2 substrate and mesoporous SBA-15 has been studied by using Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS). Contact angle technique is employed to study the adsorption kinetics of methanol on SiO(100)/SiO2 and thermal stability of adlayer. Thermogravimetric (TGA) technique is used to understand the thermal behavior of methanol layer on SBA-15. Adsorption kinetics fit fairly well with Langmuir isotherms giving adsorption rate constant, k(a) = 0.0021 W s(-1). FTIR results show formation of methoxy silicon (SiOCHA silicon polyhydride (SiH2), carboxylate, molecular water and hydroxyl groups on Si(100)/SiO2 surface and only methoxy silicon on SBA-15. XPS results confirm methanol adsorption and support FTIR results. The methanol adlayers are found to be thermally stable up to a temperature of similar to 262 degrees C on both Si(100)/SiO2 and SBA-15 and decompose between 262 and 450 degrees C. (c) 2006 Elsevier B.V. All rights reserved.</p>10aAdsorption10adesorption10akinetics10aMethanol10aSBA-1510aSi(100)/SiO210athermal stability1 aMirji, S., A.1 aHalligudi, Shivaraj, B.1 aMathew, Nevin, T.1 aRavi, V.1 aJacob, Nalini, E.1 aPatil, K., R.  uhttps://library.ncl.res.in/content/adsorption-methanol-si100sio2and-mesoporous-sba-15-001827nas a2200277   4500008004100000022001400041245004800055210004700103260007300150300001000223490000700233520100400240653001501244653002401259653001301283653001101296653001301307653002201320100001801342700002801360700002201388700002201410700001801432700002001450856007901470       2007                        eng d  a0167-577X00aAdsorption of methanol on mesoporous SBA-150 aAdsorption of methanol on mesoporous SBA15  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJAN  a88-920 v613 a<p>The adsorption of methanol onmesoporous SBA-15 has been studiedbyrising Brunauer-Emmett-Teller (BET) surface area analysis, scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray photoclectrom spectroscopy (XPS) and tbennogravimettic analysis (TGA). The BET surface area analysis shows decreases of the surface area from 387 to 383 m(2)/g, pore volume from 0.88 to 0.81 cm(3)/g and pore diameter from 9.07 to 8.4 mm after methanol adsorption. The appearance of strong IR bands at 2862 and 2964cm(-1) due to methyl (-CH3) symmetric and asymmetric stretching demonstrate the presence of methanol and evidence of successful methanol adsorption. XPS results show increase of carbon and oxygen content on the surface of SBA-15. Thermogravirriettic analysis shows that the methanol adsorbed on SBA-15 is stable up to a temperature of 265 degrees C and that the methanol adlayers decompose between 265 and 588 degrees C. (c) 2006 Elsevier B.V. All rights reserved.</p>10aAdsorption10aElectron microscopy10aMethanol10aSBA-1510aSurfaces10athermal stability1 aMirji, S., A.1 aHalligudi, Shivaraj, B.1 aMathew, Nevin, T.1 aJacob, Nalini, E.1 aPatil, K., R.1 aGaikwad, A., B.  uhttps://library.ncl.res.in/content/adsorption-methanol-mesoporous-sba-15-001941nas a2200289   4500008004100000022001400041245020800055210006900263260007300332300001200405490000700417520083100424653001701255653001701272653001801289653001501307653002101322653001801343653001701361653002301378100001801401700002501419700002201444700002801466700002701494856013001521       2007                        eng d  a1381-514800aSynthesis and characterization of novel polyurethanes based on 4,4 `-[1,4-phenylenedi-diazene-2,1-dlyl] bis(2-carboxyphenol) and 4,4 `-[1,4-phenylenedi-diazene-2,1-diyl] bis(2-chlorophenol) hard segments0 aSynthesis and characterization of novel polyurethanes based on 4  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUN  a503-5140 v673 a<p>Eight novel polyurethanes (PUs) based on 4,4'-[1,4-phenylenedi-diazene-2,1-diyl]bis(2-carboxyphenot) and 4,4'-[1,4phenylenedi-diazene-2,1-diyl]bis(2-chloro- phenol) as hard segments with four diisocyanates viz., 4,4-diphenyl-methane diisocyanate, toluene 2,4-diisocyanate, isophorone diisocyanate and hexamethylene diisocyanate were prepared. Structural and thermal characterization of the segmented PUs were determined by FT-IR, UV spectrophotometry, fluoroscence spectroscopy, H-1 NMR, C-13 NMR spectroscopy and DTA/TGA analysis. All the PUs contain domains of semi-crystalline and amorphous structures, as indicated by X-ray diffraction. PUs were soluble in polar aprotic solvents like N-methyl-2-pyrrolidone (NMP), dimethyl formamide (DMF) and dimethylsulfoxide (DIVISO). (c) 2007 Elsevier Ltd. All rights reserved.</p>10aazo polymers10afluorescence10ahard segments10aMorphology10aphase separation10apolyurethanes10aspectroscopy10aThermal properties1 aRaghu, A., V.1 aGadaginamath, G., S.1 aMathew, Nevin, T.1 aHalligudi, Shivaraj, B.1 aAminabhavi, Tejraj, M.  uhttps://library.ncl.res.in/content/synthesis-and-characterization-novel-polyurethanes-based-44-14-phenylenedi-diazene-21-dlyl01893nas a2200253   4500008004100000022001400041245023800055210006900293260006800362300001200430490000800442520084500450653002601295653000801321653001901329653001801348653002301366100001801389700002501407700002201432700002801454700002701482856013001509       2007                        eng d  a0021-899500aSynthesis, characterization, and acoustic properties of new soluble polyurethanes based on 2,2 `-[1,4-phenylenebis(nitrilomethylylidene)diphenol and 2,2 `-[4,4 `-methylene-di-2-methylphenylene-1,1 `-bis(nitrilomethylylidene)]diphenol0 aSynthesis characterization and acoustic properties of new solubl  a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcOCT  a299-3080 v1063 a<p>Eight novel polyurethanes based on 2,2'-[1,4-phenylenebis(nitrilomethylylidene)]diphenol and 2,2-[4,4'methylene-di-2-methylphenylene-1,1'-bis(nitrilomethylylidene) ]diphenol acting as hard segments with two aromatic and two aliphatic diisocyanates (4,4'-diphenytmethane diisocyanate, toluene 2,4-diisocyanate, isophorone diisocyanate, and hexamethylene diisocyanate) were prepared and characterized with Fourier transform infrared, UV spectrophotometry, fluorescence spectroscopy, H-1-NMR and C-13-NMR spectroscopy, thermogravimetric analysis, and differential thermal analysis. All the polyurethanes contained domains of semicrystalline and amorphous structures, as indicated by X-ray diffraction. The acoustic properties and solubility parameters were calculated with the group contribution method. (c) 2007 Wiley Periodicals, Inc.</p>10ainfrared spectroscopy10aNMR10aphase behavior10apolyurethanes10aThermal properties1 aRaghu, A., V.1 aGadaginamath, G., S.1 aMathew, Nevin, T.1 aHalligudi, Shivaraj, B.1 aAminabhavi, Tejraj, M.  uhttps://library.ncl.res.in/content/synthesis-characterization-and-acoustic-properties-new-soluble-polyurethanes-based-22-14-002263nas a2200241   4500008004100000022001400041245022000055210006900275260007300344300001200417490000800429520124100437653002401678653003901702653002201741653002801763653001401791100002001805700002201825700001701847700002801864856012901892       2008                        eng d  a1387-181100aInorganic-organic hybrid materials based on functionalized silica and carbon: a comprehensive understanding toward the structural property and catalytic activity difference over mesoporous silica and carbon supports0 aInorganicorganic hybrid materials based on functionalized silica  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcNOV  a345-3550 v1153 a<p>Inorganic-organic hybrid materials based on functionalized silica and carbon were synthesized by anchoring molybdovanadophosphoric acid (H-5[PMo10V2O40]center dot 32.5H(2)O) onto amine-functionalized SBA-15, ethane-bridged SBA-15 and mesoporous carbon, respectively. Small angle X-ray diffraction, N-2 sorption analysis, HRTEM, SEM, IFT-IR, CP-MAS NMR were used to diagnose the mesoporous structure of inorganic-organic hybrid materials. The structural integrity of molybdovanadophosphoric acid has been found to be retained after immobilization over mesoporous materials. These inorganic-organic hybrid materials were tested in the environmentally friendly oxidation of 2-methylnaphthalene (2MN) with 30%, aqueous hydrogen peroxide. Molybdovanadophosphoric acid containing mesoporous organosilica hybrid material (ethane-bridged SBA-15) exhibited higher catalytic activities in the oxidation of 2MN to give a clean product 2-methy-1,4-naphthoquinone (menadione vitamin K3 precursor), because of the improved hydrophobicity of the material. The correlation between structural properties and catalytic activities of these hybrid materials has been well addressed in our present studies. (c) 2008 Elsevier Inc. All rights reserved.</p>10a2-Methylnaphthalene10ainorganic-organic hybrid materials10amesoporous carbon10amesoporous organosilica10aOxidation1 aBordoloi, Ankur1 aMathew, Nevin, T.1 aLefebvre, F.1 aHalligudi, Shivaraj, B.  uhttps://library.ncl.res.in/content/inorganic-organic-hybrid-materials-based-functionalized-silica-and-carbon-comprehensive-001956nas a2200265   4500008004100000022001400041245007000055210006900125260006800194300001400262490000800276520107900284653001401363653001501377653001801392653001401410653002301424100001801447700002501465700001901490700002201509700002801531700002701559856010401586       2009                        eng d  a0021-899500aSynthesis and characterization of novel schiff base polyurethanes0 aSynthesis and characterization of novel schiff base polyurethane  a111 RIVER ST, HOBOKEN, NJ 07030 USAbJOHN WILEY & SONS INCcSEP  a2747-27540 v1133 a<p>Eight different types of novel polyurethanes (PUs) were synthesized through the polyaddition reaction of 4,4'-(ethane-1,2-diylidenedinitrilo)diphenol and 4,4'(pentane-1,5-diylidenedinitrilo)diphenol with four different diisocyanates: 4,4'-diphenylmethane diisocyanate, toluene 2,4-diisocyanate, isophorone diisocyanate, and hexamethylene diisocyanate. The resulting PUs were soluble in polar, aprotic solvents. Structures of the diols and PUs were established with Ultraviolet-visible, fluorescence, Fourier transform infrared (FTIR), (1)H-NMR, and (13)C-NMR spectroscopy data. FTIR and NMR spectral data indicated the disappearance of both hydroxyl and isocyanate groups in the PUs. The thermal properties were investigated with thermogravimetry and differential scanning calorimetry. The weight losses, glass transitions, onset temperatures, and crystalline melting temperatures were measured. All the PUs exhibited semicrystalline and amorphous morphologies, as indicated by X-ray diffraction. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 113: 2747-2754, 2009</p>10aamorphous10aMorphology10apolyurethanes10asynthesis10aThermal properties1 aRaghu, A., V.1 aGadaginamath, G., S.1 aJeong, Han, Mo1 aMathew, Nevin, T.1 aHalligudi, Shivaraj, B.1 aAminabhavi, Tejraj, M.  uhttps://library.ncl.res.in/content/synthesis-and-characterization-novel-schiff-base-polyurethanes-0