[Rh(cod)Cl]2 complex immobilized on mesoporous molecular sieves MCM-41-a new hybrid catalyst for polymerization of phenylacetylene

被引：35

作者：

Balcar, H ^{[1
]}

Cejka, J

Sedlácek, J

Svoboda, J

Zedník, J

Bastl, Z

Bosácek, V

Vohlídal, J

机构：

[1] Acad Sci Czech Republ, J Heyrovsky Inst Phys Chem, CR-18223 Prague 8, Czech Republic

[2] Charles Univ, Fac Sci, Dept Phys & Macromol Chem, Lab Specialty Polymers, CZ-12840 Prague, Czech Republic

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2003年 / 203卷 / 1-2期

关键词：

hybrid catalyst; MCM-41; rhodium complexes; phenylacetylene polymerization; polyacetylenes;

D O I：

10.1016/S1381-1169(03)00379-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new hybrid catalyst affording polymerization of phenylacetylene (PhA) into high-molecular-weight (M-w = 180 000) high-cis-polyphenylacetylene (PPhA) was prepared via immobilization of [Rh(cod)Cl](2) (cod = eta(4)-cycloocta-1,5-diene) on siliceous mesoporous molecular sieves MCM-41 modified by 3-aminopropyltrimethoxysilane. The polymerization was confirmed to proceed on anchored Rh-species and PPhA formed was continuously released into liquid phase, from which it was easily isolated. In comparison with related homogeneous catalysts, the hybrid catalyst provided comparable or even higher PPhA yields, considerably higher molecular weight of PPhA and reduced amounts of oligomeric by-products. The catalyst was found to be resistant to Rh leaching; however, chemical transformation of anchored Rh-species occurring during polymerization strongly reduced the possibility of catalyst re-using. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：287 / 298

页数：12

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