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Size and Shape Dependence of Organo‐Interconnected Silsesquioxanes through Hydrolysis‐Condensation Reaction Conditions: Nanotubes, Spheres and Films
Author(s) -
Pichon B. P.,
Wong Chi Man M.,
Dieudonné P.,
Bantignies J.L.,
Bied C.,
Sauvajol J.L.,
Moreau J. J. E.
Publication year - 2007
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200600670
Subject(s) - materials science , small angle x ray scattering , dissolution , chemical engineering , molecule , condensation , nanometre , self assembly , transmission electron microscopy , hydrolysis , benzene , diffraction , crystallography , nanotechnology , polymer chemistry , organic chemistry , composite material , scattering , optics , chemistry , physics , thermodynamics , engineering
A tris‐silylated urea‐based compound, 1,3,5‐tris(triethoxysilylpropylureido)benzene has been synthesized. Hybrids materials with different shapes (films, spheres and tubes) are obtained upon base‐catalyzed hydrolytic condensation of this compound. A self‐templating process is demonstrated using electron microscopy (SEM and TEM) and X‐ray diffraction (SAXS and WAXS) techniques. We show the formation of nanometer size hollow tubes according to the size of the self‐templating crystalline precursor. The possibility for this self‐templating to occur is due to a favored dissolution of the self‐assembled molecules of the precursor in a preferential direction parallel to the cross‐section of the crystals.