CONFORMATIONAL EFFECTS ON SIGMA-CONJUGATION - UV AND IR-SPECTRA OF MATRIX-ISOLATED TRANS-N-SI4ME10 AND GAUCHE-N-SI4ME10

被引：62

作者：

PLITT, HS ^{[1
]}

MICHL, J ^{[1
]}

机构：

[1] UNIV COLORADO,DEPT CHEM & BIOCHEM,BOULDER,CO 80309

来源：

CHEMICAL PHYSICS LETTERS | 1992年 / 198卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0009-2614(92)85072-I

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：

In rare ps matrices, gauche-Si4Me10 and trans-Si4Me10 have distinct IR and very different UV spectra, permitting selective phototransformations of one or the other into Si3Me8 and SiMe2 with monochromatic light, and separation of the spectra. t-Si4Me10 shows the expected red-shift relative to Si3Me8, but g-Si4Me10 does not. The consequences of this observation for simple theories of sigma-conjugation are analyzed and an extension of the popular Sandorfy C model is proposed. Implications for conformationally induced segmentation of polysilane chains into weakly interacting chromophores are noted.

引用

页码：400 / 405

页数：6

共 38 条

[1] SINGLET EXCITATION IN POLYSILANES - ABINITIO CALCULATIONS ON OLIGOSILANE MODELS [J].