Molecularly Designed Sol-Gel Hybrid Catalysts
Several triethoxysilylated ligands have been synthesized and after complexation with a metal followed by the hydrolysis, efficient and recyclable heterogeneous catalysts were obtained. Three examples of catalytic reactions have been studied with these organic-inorganic hybrid materials obtained by the sol-gel process: (1) asymmetric reduction of prochiral ketones by hydride transfer, (2) Suzuki’s coupling reaction and (3) metathesis of dienes and enynes.
KeywordsHeterogeneous catalysis hybrid silica hydrolysis-condensation organic-inorganic hybrid silsesquioxanes sol-gel
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