%0 Journal Article
%T In situ X-ray Measurements to Probe a New Solid-State Polycondensation Mechanism for the Design of Supramolecular Organo-Bridged Silsesquioxanes
%+ Laboratoire des colloïdes, verres et nanomatériaux (LCVN)
%+ Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM)
%+ European Synchrotron Radiation Facility (ESRF)
%A Dieudonné, Philippe
%A Wong Chi Man, Michel
%A Pichon, Benoît P.
%A Vellutini, Luc
%A Bantignies, Jean-Louis
%A Blanc, Christophe
%A Creff, Gaëlle
%A Finet, Stéphanie
%A Sauvajol, Jean-Louis
%A Bied, Catherine
%A Moreau, Joël J.E.
%< avec comité de lecture
%@ 1613-6810
%J Small
%I Wiley-VCH Verlag
%V 5
%N 4
%P 503-510
%8 2009
%D 2009
%R 10.1002/smll.200800254
%K SAXS
%K silsequioxanes
%K sol–gel materials
%K solid-state reactions
%K reaction mechanisms
%K WAXS
%Z Chemical Sciences/Organic chemistryJournal articles
%X A long-range ordered organic/inorganic material is synthesized from a bissilane, (EtO)3Si–(CH2)3–NHCONH–C6H4–NHCONH–(CH2)3–Si(OEt)3. This crosslinked sol–gel solid exhibits a supramolecular organization via intermolecular hydrogen bonding interactions between urea groups (–NHCONH–) and covalent siloxane bonding, Si–O–Si . Time-resolved in situ X-ray measurements (coupling small- and wide-angle X-ray scattering techniques) are performed to follow the different steps involved in the synthetic process. A new mechanism based on the crystallization of the hydrolyzed species followed by their polycondensation in solid state is proposed.
%G English
%L hal-00381858
%U https://hal.science/hal-00381858
%~ CNRS
%~ UNIV-MONTP1
%~ UNIV-MONTP2
%~ ENSC-MONTPELLIER
%~ ICG
%~ LCVN
%~ CHIMIE
%~ UNIV-MONTPELLIER
%~ UM1-UM2
%~ TEST2-HALCNRS