Self-Organized Poly(n-octadecylsilsesquioxane) Films via Sol–Gel Photopolymerization

We describe a novel solvent- and water-free sol–gel process for n-octadecyltriclorosilane (C18H37SiCl3) film catalyzed by photogenerated Brönsted acids. Driven by hydrophobic van der Waals interactions, a photoinduced self-assembly process occurs to afford a long-range ordered lamellar mesostructur...

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Bibliographic Details
Published in:Langmuir 2011-10, Vol.27 (20), p.12621-12629
Main Authors: Chemtob, Abraham, Ni, Lingli, Croutxé-Barghorn, Céline, Demarest, Aude, Brendlé, Jocelyne, Vidal, Loïc, Rigolet, Séverinne
Format: Article
Language:English
Subjects:
Catalysis
Chemical Sciences
Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Materials: Nano-and Mesostructured Materials, Polymers, Gels, Liquid Crystals, Composites
Polymers
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:We describe a novel solvent- and water-free sol–gel process for n-octadecyltriclorosilane (C18H37SiCl3) film catalyzed by photogenerated Brönsted acids. Driven by hydrophobic van der Waals interactions, a photoinduced self-assembly process occurs to afford a long-range ordered lamellar mesostructure, characterized by X-ray diffraction and transmission electron microscopy. Real-time Fourier transform IR spectroscopy was instrumental to probe the fast hydrolysis kinetics and assess the change of conformational behavior of the alkyl chains during UV irradiation. A unique combination of different solid-state NMR techniques (29Si, 13C, 1H) provided an insight into the supramolecular organization of this hybrid film.
ISSN:0743-7463
1520-5827
DOI:10.1021/la202253v