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Designed synthesis of nanostructured siloxane–organic hybrids from amphiphilic silicon‐based precursors
Author(s) -
Shimojima Atsushi,
Kuroda Kazuyuki
Publication year - 2006
Publication title -
the chemical record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.61
H-Index - 78
eISSN - 1528-0691
pISSN - 1527-8999
DOI - 10.1002/tcr.20073
Subject(s) - siloxane , silanol , amphiphile , lamellar structure , hybrid material , alkyl , materials science , silicon , molecule , organosilicon , chemical engineering , covalent bond , polymer chemistry , organic chemistry , nanotechnology , chemistry , copolymer , catalysis , polymer , engineering , composite material
This paper reports on recent progress in the synthesis of nanostructured siloxane–organic hybrids based on the self‐assembly of amphiphilic silicon‐based precursors. A variety of ordered hybrid materials have been obtained by molecular design of the precursors. Alkoxysilanes and chlorosilanes with covalently attached hydrophobic organic tails are hydrolyzed to form amphiphilic molecules containing silanol groups, leading to the formation of layered (lamellar) structures. Transparent and oriented thin films of lamellar hybrids were prepared by the reaction in the presence of tetraalkoxysilane. In addition, the design of molecules having alkyl chains and large oligosiloxane heads led to the formation of mesophases consisting of cylindrical assemblies, providing a direct pathway to ordered porous silica. The synthesis, structural features, and formation processes of these hybrid mesostructures are discussed. © 2006 The Japan Chemical Journal Forum and Wiley Periodicals, Inc. Chem Rec 6: 53–63; 2006: Published online in Wiley InterScience ( www.interscience.wiley.com ) DOI 10.1002/tcr.20073