02433nas a2200241 4500008004100000022001400041245014400055210006900199260011700268300001200385490000800397520144700405653000801852653003401860653003801894653002601932653003101958653002201989653001102011100002702022700001802049856012402067 2009 eng d a0920-586100aRu(II)-Chiral (1R,2S)-(+)-cis-1-amino-2-indanol immobilized over SBA-15 for asymmetric transfer hydrogenation reaction of prochiral ketones0 aRuIIChiral 1R2Scis1amino2indanol immobilized over SBA15 for asym aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbCatalysis Soc India; Petrotech Soc; Indo US Sci & Technol ForumcMAR a161-1670 v1413 a

Mesoporous SBA-15 (Santa Barbara University at California) has been synthesized and functionalized with (4-chloromethyl)phenyltriethoxysilane, there after the surface silanols groups were passivated by dimethoxydimethylsilane (MeO(2)Me(2)Si) [Bz-SBA-15]. Further (1R,2S)-(+)-cis-1-amino-2-indanol [AIL] has been immobilized over functionalized SBA-15 (BzAIL-SBA-15). The heterogeneous catalysts were synthesized by complexation of BzAIL-SBA-15 by [RuCl(2)(benzene)](2) and [RuCl(2)(p-cymene)](2) in 2-propanol at reflux condition designated as Ru-Bn-BzAIL-SBA-15 (Ru-1) and Ru-Cy-BzAIL-SBA-15 (Ru-2). The synthesized materials have been characterized by small angle X-ray diffraction spectroscopy (SAXS), N(2) adsorption-desorption isotherms, Fourier Transformed-Infra-red (FT-IR) spectroscopy, Transmission Electron Microscopy (TEM), intensively Coupled plasma atomic emission spectroscopy (ICP-AES), Diffuse reflectance UV-vis and (13)C CP MAS NMR analysis. Further the synthesized and characterized materials (Ru-1 and Ru-2) have been successfully applied in the asymmetric transfer hydrogenation (ATH) reaction of simple prochiral ketones, which gave a yield of 56% and 18% and enantiomeric excess (ee) values of 62% and 77% for Ru-1 and Ru-2, respectively, after 1 h for acetophenone. The reusability studies showed approximately the same enantiomeric excess value at lower conversions. (c) 2008 Elsevier B.V. All rights reserved.

10a(1R10a2S)-(+)-Cis-1-amino-2-indanol10aAsymmetric transfer hydrogenation10aChiral amino alcohols10aMesoporous molecular sieve10aProchiral ketones10aSBA-151 aParambadath, Surendran1 aSingh, A., P. uhttps://library.ncl.res.in/content/ruii-chiral-1r2s-cis-1-amino-2-indanol-immobilized-over-sba-15-asymmetric-transfer-002017nas a2200229 4500008004100000022001400041245013900055210006900194260011000263300001400373490000600387520110100393100002301494700002001517700002701537700001601564700001701580700002201597700002001619700001801639856013001657 2011 eng d a2040-250300aHierarchical mesoporous bio-polymer/silica composites co-templated by trimethyl chitosan and a surfactant for controlled drug delivery0 aHierarchical mesoporous biopolymersilica composites cotemplated  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcDEC a1162-11660 v23 a

In this communication, we report the facile synthesis of hierarchical mesoporous bio-polymer/silica composite materials with bimodal mesopores using a dual-template of the cationic N,N,N-trimethyl chitosan (TMCs) and the anionic sodium dodecyl sulfate (SDS) via one-step synthetic strategy. Tetraethoxysilane (TEOS) was used as a silica source. The nitrogen adsorption/desorption measurements and transmission electron microscopy analysis showed the hierarchical structure of the mesoporous bio-polymer/silica composites with bimodal mesopores having an average pore size of 5-7 nm with the visible voids between the silica nanoparticles, which allow the mesoporous bio-polymer/silica composites to encapsulate a large number of guest drug molecules, Ibuprofen (IBU) or 5-fluorouracil (5-FU), due to their high surface area and pore volume. In addition, the mesoporous chitosan-silica composites also had a long term biocompatibility for the target release of the drug molecules to the CEM cells, MCF cells, etc. as well as a pH sensitive controlled release behavior of the drug molecules.

1 aRana, Vijay, Kumar1 aPark, Sung, Soo1 aParambadath, Surendran1 aKim, Mi, Ju1 aKim, Sun-Hee1 aMishra, Satyendra1 aSingh, Raj, Pal1 aHa, Chang-Sik uhttps://library.ncl.res.in/content/hierarchical-mesoporous-bio-polymersilica-composites-co-templated-trimethyl-chitosan-and-001803nas a2200277 4500008004100000022001400041245013100055210006900186260009500255300001200350490000800362520076400370653002601134653002301160653001301183653004301196100002301239700001701262700002701279700001901306700002001325700002201345700002001367700001801387856012001405 2012 eng d a0022-459600aHeterocyclic tri-urea isocyanurate bridged groups modified periodic mesoporous organosilica synthesized for Fe(III) adsorption0 aHeterocyclic triurea isocyanurate bridged groups modified period a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcOCT a392-3990 v1943 a

To achieve a high level of heavy metal adsorption, 1,1',1 `'-(1,3,5-triazine-2,4,6-triyl)tris(3-(3-(triethoxysilyl) propyl)urea) (TTPU) was synthesized as a novel melamine precursor and incorporated on the silica surface of periodic mesoporous organosilica (PMO). The melamine modified PMOs (MPMOs) were synthesized under acidic conditions using TTPU, tetraethylorthosilicate (TEOS) and Pluronic P123 as a template and the modified PMOs were characterized using the relevant instrumental techniques. The characteristic materials were used as adsorbents for the adsorption of Fe(III) ions. Fe(III) adsorption studies revealed MPMO-7.5 to be a good absorbent with higher adsorption efficiency than other MPMOs. (C) 2012 Elsevier Inc. All rights reserved.

10aAdsorption efficiency10aFe(III) adsorption10aMelamine10aPeriodic mesoporous organosilica (PMO)1 aRana, Vijay, Kumar1 aSelvaraj, M.1 aParambadath, Surendran1 aChu, Sang-Wook1 aPark, Sung, Soo1 aMishra, Satyendra1 aSingh, Raj, Pal1 aHa, Chang-Sik uhttps://library.ncl.res.in/content/heterocyclic-tri-urea-isocyanurate-bridged-groups-modified-periodic-mesoporous-0