@article { ISI:000241686000011, title = {Novel beaded polymers from telechelic methacrylic ether esters}, journal = {Reactive \& Functional Polymers}, volume = {66}, number = {10}, year = {2006}, month = {OCT}, pages = {1087-1096}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

A series of telechelic dimethacrylic ether-esters (MEE) were prepared by solventless reaction of alpha,omega-dihydroxy poly(oxytetramethylene) (polytetrahydrofuran, PTHF) with phthalic anhydride and glycidyl methacrylate (GMA). MEE was polymerized with GMA as well as GMA-ethylene dimethacrylate (EGDM) to form porous beads. The terpolymer beads were observed using optical microscopy and SEM and characterized for internal pore volume, equilibrium volume-swelling ratio and dimethyl formamide and aqueous buffer regain. The morphology of the beads was dictated by the mole fraction and molecular weight of MEE in the feed. Porosity was found to increase with increase in molecular weight of MEE. Thus, porosity as high as 49\%, 50\% and 55\% was observed with MEE of molecular weights 1580, 2580 and 3480, respectively. At a specific terpolymerization feed ratio of monomers, the terpolymers formed transform from gel like structure into a macroporous one, with increase in molecular weight of MEE. (c) 2006 Elsevier B.V. All rights reserved.

}, keywords = {ether-ester dimethacrylates, macroporous, Pore size distribution, porosity, telechelics}, issn = {1381-5148}, doi = {10.1016/j.reactfunctpolym.2006.01.020}, author = {Pujari, N. S. and Trivedi, J. and Ingavle, Ganesh C. and Ponrathnam, S.} } @article { ISI:000288291400015, title = {Self-standing three-dimensional networks of nanoparticles with controllable morphology by dynamic templating of surfactant hexagonal domains}, journal = {Chemistry of Materials}, volume = {23}, number = {6}, year = {2011}, month = {APR}, pages = {1448-1455}, publisher = {AMER CHEMICAL SOC}, type = {Article}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

Assembly of nanoparticles into free-standing three-dimensional networks has implications for a wide range of applications. We show that dynamic templating of surfactant hexagonal domains is a facile technique to organize nanoparticles into a network of particulate strands. Dispersed particles (\> 10 nm), independent of particle chemistry, assemble into networks, when the surfactant matrix cools into the hexagonal phase. We demonstrate assembly of inorganic, polymeric, and protein nanoparticles into networks. Where particle assembly is reversible, particles are coated with polymers that are subsequently cross-linked to stabilize the networks after surfactant removal. This technique involves near ambient temperatures and a benign water wash for template removal. The network mesh size can be varied from submicrometers to tens of micrometers by controlling the cooling rate. Particle networks can be flow-oriented prior to cross-linking, and interpenetrating networks can also be formed.

}, keywords = {hexagonal, macroporous, nanoparticle, self assembly, surfactant}, issn = {0897-4756}, doi = {10.1021/cm102945x}, author = {Sharma, Kamendra P. and Ganai, Anal Kumar and Sen Gupta, Sayam and Kumaraswamy, Guruswamy} } @article {44522, title = {Mesoporous shell@macroporous core aluminosilicates as sustainable nanocatalysts for direct N-alkylation of amines}, journal = {Chemnanomat}, volume = {4}, year = {2018}, month = {JUN}, pages = {537-541}, abstract = {

Aluminosilicate spheres with a macroporous core and mesoporous shell (Si/Al ratio of 11) is synthesised by a sol-gel method utilizing cetyltrimethyl ammonium bromide (CTAB) as a structure directing agent in basic medium. The selective incorporation of aluminium in the silica matrix results in the formation of aluminosilicates with an overall acidity of 0.32mmol/g with interconnected pores. Direct N-alkylation reaction is a prototype of C-N bond formation reaction and meso- macroporous aluminosilicate is shown to catalyze this reaction with excellent yield. The catalyst is tested and found sustainable for five catalytic cycles even without any high temperature regeneration step.

}, keywords = {Aluminosilicates, macroporous, Mesoporous, N-alkylation, nanocatalysis}, issn = {2199-692X}, doi = {10.1002/cnma.201800081}, author = {Sekhar, Anandakumari C. Sunil and Ashokkumar, Anumol Erumpukuthickal and Cygnet, Choorapoikayil T. and Lakshmi, Saseendranpillai Vidhya and Deepak, Francis Leonard and Vinod, Chathakudath P.} }