Polymerization of phenylacetylene by iridium catalysts

被引：7

作者：

Kanki, K ^{[1
]}

Misumi, Y ^{[1
]}

Masuda, T ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Engn, Dept Polymer Chem, Kyoto 6068501, Japan

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2002年 / 40卷 / 08期

关键词：

transition metal chemistry; organometallic catalysts; iridium complex; phenylacetylene; substituted polyacetylene;

D O I：

10.1002/pola.10184

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Polymerization of phenylacetylene (PA) with [(cod)IrCl](2)-based catalysts (cod: 1,5-cyclooctadiene) was examined. The [(cod)IrCl](2)/n-BuLi and [(cod)IrCl](2)/ Ph2C=C(Ph)Li systems induced the polymerization of PA to produce polymers with a number-average molecular weight (M-n) of around several thousand in rather low yields. On the other hand, the catalyst composed of [(cod)IrCl](2), norbornadiene (nbd), Ph3P, and Ph2C=C(Ph)Li (molar ratio of 1:1:1.1:2) produced polymer in a high yield (ca. 80%) in toluene at 0 degreesC. The resulting polymer showed a bimodal gel permeation chromatographic profile (M-n = 209,000 and 4300; ratio: 81/19). On the basis of these findings, the presence of two active species, that is, Ir complexes with nbd,and cod, are discussed. (C) 2002 Wiley Periodicals, Inc.

引用

页码：1075 / 1080

页数：6