1. A solvent-free photochemical route for the preparation of mesoporous inorganic films
- Author
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De Paz, Héloïse, Chemtob, Abraham, Croutxé-Barghorn, Céline, Rigolet, Séverinne, and Lebeau, Bénédicte
- Subjects
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MESOPOROUS materials , *THIN films , *PHOTOCHEMISTRY , *EVAPORATION (Chemistry) , *MOLECULAR self-assembly , *SILICA , *POLYETHYLENE oxide , *SURFACE active agents , *NUCLEAR magnetic resonance spectroscopy - Abstract
Abstract: An alternative to the Evaporation Induced Self Assembly (EISA) method is described as a fast and simplified approach towards mesoporous silica films. The sol–gel process is photochemically triggered with the aid of photoacid generator (PAG), thereby making mesostructuration independent of film deposition conditions, solvent evaporation and complex chemistry associated with a silica sol. The developed solvent-free synthesis uses non-ionic poly(ethylene oxide)-based surfactants and polydimethoxysiloxane, affording after UV irradiation a film with a wormhole porous framework, and a uniform pore size distribution. The disordered mesostructure was characterized by X-ray diffraction, N2 adsorption, 29Si solid-state NMR and transmission electron microscopy. [Copyright &y& Elsevier]
- Published
- 2012
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