@article { ISI:000249864300018, title = {Regio- and stereoselective synthesis of beta-amino alcohols over titanosilicate molecular sieves}, journal = {Applied Catalysis A-General}, volume = {330}, year = {2007}, month = {OCT}, pages = {145-151}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

A novel application of titanosilicate molecular sieves in the synthesis of P-amino alcohols via aminolysis of epoxides, at mild and solvent-free conditions, is reported, for the first time. A range of beta-amino alcohols with nearly 100\% regio- and stereoselectivity was produced over these reusable solid catalysts in high yields. (C) 2007 Elsevier B.V. All rights reserved.

}, keywords = {Aminolysis of epoxides, synthesis of beta-amino alcohols, Ti-MCM-41, titanosilicate molecular sieves}, issn = {0926-860X}, doi = {10.1016/j.apcata.2007.07.019}, author = {Satyarthi, Jitendra K. and Saikia, Lakshi and Srinivas, Darbha and Ratnasamy, P.} } @article { ISI:000264437500011, title = {Redox and selective oxidation properties of Mn complexes grafted on SBA-15}, journal = {Catalysis Today}, volume = {141}, number = {1-2}, year = {2009}, note = {18th National Symposium and Indo-US Seminar on Catalysis, Indian Inst Petroleum, Dehradun, INDIA, APR 16-18, 2007}, month = {MAR}, pages = {66-71}, publisher = {Catalysis Soc India; Petrotech Soc; Indo US Sci \& Technol Forum}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

Manganese complexes of 5,10,15,20-tetraphenylporphyrin (Mn(TPP)Cl) were grafted on SBA-15 functionalized with propyl-amine, -thiol and -sulfonic acid groups. The acido-basic properties of the support influenced the oxidation state, redox behavior and selective oxidation properties of the Mn complexes. Acidic supports (SBA-15-pr-SH and SBA-15-pr-SO(3)H) promoted the reduction of Mn ions in Mn-TPP complexes from 3+ to 2+ oxidation state. A similar behavior was found also when Mn(Salen)Cl complexes were immobilized on those supports. However, the extent of such facile reduction was more in the case of Mn-TPP than in Mn-Salen complexes. The former exhibited superior catalytic activity (turnover frequency) than the latter-type Mn complexes in regio-, stereo- and chemoselective oxidation of R-(+)-limonene with molecular oxygen (1 atm) at ambient temperatures. The catalytic oxidation activity correlates with the redox behavior of the grafted Mn complexes. (c) 2008 Elsevier B.V. All rights reserved.

}, keywords = {Grafted manganese complexes, Mn(Salen)Cl, Mn(TPP)Cl, Organo-functionalized SBA-15, Redox behavior of Mn, Selective oxidation of limonene}, issn = {0920-5861}, doi = {10.1016/j.cattod.2008.03.014}, author = {Saikia, Lakshi and Srinivas, D.} } @article { ISI:000278832400011, title = {Regiospecific oxyhalogenation of aromatics over SBA-15-supported nanoparticle group IV-VI metal oxides}, journal = {Catalysis Letters}, volume = {137}, number = {3-4}, year = {2010}, month = {JUL}, pages = {190-201}, publisher = {SPRINGER}, address = {233 SPRING ST, NEW YORK, NY 10013 USA}, abstract = {

TiO(x), VO(x), MoO(x) and WO(x) supported on SBA-15 exhibit efficient catalytic activity for oxyhalogenation of aromatics with the H(2)O(2)-halide ion system. Unlike the hitherto known solid catalysts, these reusable catalysts yield the para-halogenated product with 100\% selectivity at 298 K and moderate acidic pH (3-5). The catalytic activity was enhanced by five orders of magnitude when supported on SBA-15.

}, keywords = {Haloperoxidase activity, Ordered mesoporous silica, Oxyhalogenation of aromatics, SBA-15, Supported metal oxides}, issn = {1011-372X}, doi = {10.1007/s10562-010-0350-z}, author = {Saikia, Lakshi and Rajesh, M. and Srinivas, Darbha and Ratnasamy, P.} }