J. Geserick, S. Meyer, M. Puchberger, S. Pabisch, H. Peterlik, O. Bethge, E. Bertagnolli, U. Schubert:
"Porous Silica-Based Mixed Oxides with Basic Organic Sites";
European Journal of Inorganic Chemistry, 2012 (2012), 33; S. 5207 - 5215.

Kurzfassung englisch:
Porous, organically modified silica-based mixed oxides were prepared in a two-step process. First, a mixture of tetraethoxysilane, bis(triethoxysilyl)dipropylamine and, optionally, 1,4-bis(triethoxysilyl)benzene was treated with metal chlorides (ZrCl4, TiCl4, or AlCl3), and no water or water-based catalyst was added to the sols. After film formation, the materials were exposed to ambient humidity to achieve hydrolytic condensation of residual groups. Materials with wormhole-like ordered porosity and uniform mesopores were obtained with metal proportions up to about 20 %. According to XPS measurements, the metals are homogenously distributed in the silica matrix.

Mesoporous materials; Thin films; Organic-inorganic hybrid compounds; Sol-gel processes; Mixed-metal oxides

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