Hybrid Catalysts for Acetylenes Polymerization Prepared by Anchoring [Rh(cod)Cl]2 on MCM-41, MCM-48 and SBA-15 Mesoporous Molecular Sieves - The Effect of Support Structure on Catalytic Activity in Polymerization of Phenylacetylene and 4-ethynal- N-(4-[trimethylsilyl)-ethynyl]benzylidene)aniline

0181732 - UFCH-W 20030166 RIV CZ eng J - Journal Article
Balcar, Hynek - Sedláček, J. - Svoboda, J. - Žilková, Naděžda - Rathouský, Jiří - Vohlídal, J.
Hybrid Catalysts for Acetylenes Polymerization Prepared by Anchoring [Rh(cod)Cl]2 on MCM-41, MCM-48 and SBA-15 Mesoporous Molecular Sieves - The Effect of Support Structure on Catalytic Activity in Polymerization of Phenylacetylene and 4-ethynal- N-(4-[trimethylsilyl)-ethynyl]benzylidene)aniline.
Collection of Czechoslovak Chemical Communications. Roč. 68, č. 10 (2003), s. 1861-1876. ISSN 0010-0765
R&D Projects: GA ČR GA203/02/0976; GA ČR GA203/03/0824
Institutional research plan: CEZ:AV0Z4040901
Keywords : substituted acetylenes polymerization * hybrid catalysts * mesoporous molecular sieves
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 1.041, year: 2003

Hybrid catalysts for acetylenes polymerizations were prepared by anchoring [Rh(cod)Cl]2 complex on siliceous mesoporous molecular sieves differing in pore size and architecture (MCM-41, MCM-48 and SBA-15) via 3-aminopropyltrimethoxysilane linker. In comparison with [Rh(cod)Cl]2 used as homogeneous catalyst, all hybrid catalysts exhibited comparable or even higher catalytic activity in the polymerization of phenylacetylene and N-(4-trimethylsilylethynylbenzylidene)-4-ethynylaniline. The initial polymerization rate increased with increasing accessibility of mesoporous surface of catalysts in order of support: MCM-41< MCM-48 < SBA-15. Molecular weights of polymer prepared increased in reverse order of supports suggesting the space limitations in the pores suppress the chain growth termination reactions. No effect of catalyst support on the microstructure of formed polymers was found.
Permanent Link: http://hdl.handle.net/11104/0078258