%0 Journal Article
%T Self-Organized Hybrid Solids
%+ Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM)
%+ Laboratoire des colloïdes, verres et nanomatériaux (LCVN)
%A J.E. Moreau, Joël
%A Vellutini, Luc
%A Wong Chi Man, Michel
%A Bied, Catherine
%A Bantignies, Jean-Louis
%A Dieudonné, Philippe
%A Sauvajol, Jean-Louis
%< avec comité de lecture
%J Materials Research Society Symposia Proceedings
%V 726
%P Q7.2
%8 2002
%D 2002
%R 10.1557/PROC-726-Q7.2
%Z Chemical Sciences/Material chemistryJournal articles
%X A new method has been developed for the synthesis of shaped-controlled bridged silsesquioxanes by the acid hydrolysis of urea-derived silylated precursors. This method is based on the ability of the hydrogen bonds of the urea groups to organize the molecules in a supramolecular architecture and provides after hydrolysis a new access to hybrid materials with controlled morphologies. A chirality transcription from a molecular precursor to a hybrid solid has been achieved. A right- and a left-handed helices have been obtained respectively from the chiral (R,R)- and the (S,S)-enantiomers of the diureido derivatives of trans-diaminocyclohexane. In a related way, a long range ordered hybrid solid has been obtained. Long carbon chain as spacer between the urea groups of the precursor affords lamellar hybrid silicas.
%G English
%L hal-00163658
%U https://hal.science/hal-00163658
%~ CNRS
%~ UNIV-MONTP1
%~ UNIV-MONTP2
%~ ENSC-MONTPELLIER
%~ ICG
%~ LCVN
%~ CHIMIE
%~ UNIV-MONTPELLIER
%~ UM1-UM2