Synthesis, characterization and UV spectral studies of copolysilanes, {[RR′2Si(CH2)2SiMe]x[PhR1Si]1-x}n (R,R′ = Me, Et or Ph;: R1 = Me or Ph) bearing carbosilyl side chains

被引：5

作者：

Shankar, Ravi ^{[1
]}

Joshi, Arti ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Chem, New Delhi 110016, India

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2007年 / 692卷 / 11期

关键词：

Wurtz coupling; copolysilanes; Si-29{H-1} NMR; electronic spectra;

D O I：

10.1016/j.jorganchem.2007.01.031

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A number of copolysilanes, {[RR2'Si(CH2)(2)SiMe](x)[(PhRSi)-Si-1](1-x)}(n) (R, R' = Me, Et or Ph; R-1 = Me (1-3); Ph (4-6) bearing carbosilyl side chains have been synthesized by Wurtz coupling method and characterized by GPC, multinuclear (H-1, C-13{H-1}, Si-29{H-1}) NMR and UV spectral studies. A detailed study of Si-29{H-1} NMR spectra suggests that the copolysilanes 1-3 are comprised of segregated runs of PhMeSi and RMeSi (R = carbosilyl) units while 4-6 possess many different configurational and conformational environments. The UV spectra of these copolymers reveal a distinct absorption (lambda(max)) at 312-352 nm due to sigma-sigma* transition and show a strong dependence on the polymer composition as well as nature of the appended sila substituents. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：2131 / 2137

页数：7

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