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-Ethynyl-N-{4-[(trimethylsilyl)ethynyl]benzylidene}aniline

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Title: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-Ethynyl-N-{4-[(trimethylsilyl)ethynyl]benzylidene}aniline
Creators:
Balcar, Hynek
Sedláček, Jan
Svoboda, Jan
Žilková, Naděžda
Rathouský, Jiří
Vohlídal, Jiří
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 68, 10, pp. 1861-1876
Uncontrolled Keywords:Mesoporous molecular sieves, Rhodium, Substituted acetylenes polymerization, Hybrid catalysts, Solid support, Supported catalysts, Alkynes, Polyacetylenes

Abstract

Hybrid catalysts for polymerization of acetylenes were prepared by anchoring, <i>via</i> (3-aminopropyl)trimethoxysilane linker, the [Rh(cod)Cl]<sub>2</sub> complex on siliceous mesoporous molecular sieves differing in the pore size and architecture (MCM-41, MCM-48 and SBA-15). In comparison with [Rh(cod)Cl]<sub>2</sub> used as homogeneous catalyst, all hybrid catalysts exhibited comparable or even higher catalytic activity in the polymerization of phenylacetylene and 4-ethynyl-<i>N</i>-{4-[(trimethylsilyl)ethynyl]benzylidene}aniline. The initial polymerization rate increased with increasing accessibility of mesoporous surface of catalysts in the order: MCM-41 &lt; MCM-48 &lt; SBA-15. Molecular weights of the prepared polymers increased in reverse order suggesting suppression of the chain growth termination reactions by space limitations in the pores. No effect of catalyst support on the microstructure of formed polymers was found. <p>

Title: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-Ethynyl-N-{4-[(trimethylsilyl)ethynyl]benzylidene}aniline
Creators:
Balcar, Hynek
Sedláček, Jan
Svoboda, Jan
Žilková, Naděžda
Rathouský, Jiří
Vohlídal, Jiří
Uncontrolled Keywords:Mesoporous molecular sieves, Rhodium, Substituted acetylenes polymerization, Hybrid catalysts, Solid support, Supported catalysts, Alkynes, Polyacetylenes
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:68
Number:10
Page Range:pp. 1861-1876
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc20031861UNSPECIFIED
ID Code:2157
Item Type:Article
Deposited On:06 Feb 2009 17:16
Last Modified:06 Feb 2009 16:16

Citation

Balcar, Hynek; Sedláček, Jan; Svoboda, Jan; Žilková, Naděžda; Rathouský, Jiří; Vohlídal, Jiří (2003) 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-Ethynyl-N-{4-[(trimethylsilyl)ethynyl]benzylidene}aniline. Collection of Czechoslovak Chemical Communications, 68 (10). pp. 1861-1876. ISSN 0010-0765

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