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Titolo:
Bridged polysilsesquioxanes. Molecular-engineered hybrid organic-inorganicmaterials
Autore:
Shea, KJ; Loy, DA;
Indirizzi:
Sandia Natl Labs, Catalysts & Chem Technol Dept, Albuquerque, NM 87185 USASandia Natl Labs Albuquerque NM USA 87185 Dept, Albuquerque, NM 87185 USA Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA Univ Calif Irvine Irvine CA USA 92697 ne, Dept Chem, Irvine, CA 92697 USA
Titolo Testata:
CHEMISTRY OF MATERIALS
fascicolo: 10, volume: 13, anno: 2001,
pagine: 3306 - 3319
SICI:
0897-4756(200110)13:10<3306:BPMHO>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOL-GEL POLYMERIZATION; IMMOBILIZED IRON(II)-1,10-PHENANTHROLINE COMPLEXES; INTRAMOLECULAR CONDENSATION-REACTIONS; SUPPORTED ORGANOMETALLIC COMPLEXES; NONLINEAR-OPTICAL MATERIALS; DIFFERENT SPACER LENGTHS; SILYLATED COUMARIN DYES; INTERNAL DOPING METHOD; MODIFIED ELECTRODES; POROUS SILICA;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
167
Recensione:
Indirizzi per estratti:
Indirizzo: Loy, DA Sandia Natl Labs, Catalysts & Chem Technol Dept, POB 5800, Albuquerque, NM87185 USA Sandia Natl Labs POB 5800 Albuquerque NM USA 87185 ue, NM87185 USA
Citazione:
K.J. Shea e D.A. Loy, "Bridged polysilsesquioxanes. Molecular-engineered hybrid organic-inorganicmaterials", CHEM MATER, 13(10), 2001, pp. 3306-3319

Abstract

The class of hybrid organic-inorganic materials called bridged polysilsesquioxanes are used for everything from surface modifiers and coatings to catalysts and membrane materials. This paper examines how bridged polysilsesquioxanes are prepared, processed, characterized, and used. In particular, itdescribes how attaching several "inorganic" cross-linking trialkoxysilaneson organic bridging groups permits facile formation of network polymers and gels with high levels of chemical functionality. There are a number of synthetic entries into bridged polysilsesquioxane monomers that have allowed a multitude of different bridging groups to be integrated into xerogels (dry gels) or aerogels (supercritically dried "air gels"). Much of the research to date has been successfully focused on engineering of the size of poresthrough the choice of the bridging groups. For example, materials with some of the highest known surface areas in porous materials have been prepared, and parameters allowing control of the pore size distributions are well understood. More recently, however, the focus has shifted to building functionality into the bridging groups to make materials with controlled porositythat are capable of selective adsorption or catalysis or electronic and optic effects. This is the area where the full potential of bridged polysilsesquioxanes as molecular-engineered materials is being explored.

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Documento generato il 03/04/20 alle ore 11:01:34