The Preparation Of Titanium-Carboxylic Acid Hybrid Materials And Their Application In Organic Synthesis

The application of metal-containing organic-inorganic hybrid catalysts is one of the hot topics in heterogeneous organic catalysis. In this dissertation, three types of Ti-based organic-inorganic hybrid materials containing MCl2 (M=Cu, Pd, Mn) were prepared by simple sol-gel processes, and characterized by TEM, IR, XRD, EDXS, BET, TGA, ICP-AES and so on. In this method, isonicotinic acid was employed as organic ligand and tetrabutyl titanate was used as an organic precursor to form the inorganic frameworks through hydrolysis.The results showed hybrid materials supported copper, palladium, manganese showed highly catalytic activities in the proof-of-concept reactions such as aza-Michael addition, Suzuki coupling and Kabachnik-Fields reaction. The recovered catalysts could be reused for several times without the loss of activity. As-synthesized organic-inorganic hybrid materials were thus proved to be a new serial of efficient and environmentally friendly catalysts which might be applied in organic synthesis.