INFRARED AND RAMAN ACTIVITY OF POLYENES IN PRISTINE AND DOPED STATE

被引：1

作者：

CASTIGLIONI, C ^{[1
]}

RABAIOLI, R ^{[1
]}

ZERBI, G ^{[1
]}

GUSSONI, M ^{[1
]}

机构：

[1] CNR,IST CHIM FIS APPLICATA MAT,GENOA,ITALY

来源：

SYNTHETIC METALS | 1991年 / 43卷 / 1-2期

关键词：

D O I：

10.1016/0379-6779(91)91325-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The activity of a normal mode in vibrational spectra of polyenes (short, long or infinite) can be essentially represented by the quantity delta-PHI/delta-RL(Ri). PHI is the molecular dipole moment mu --> in IR and the molecular polarizability ((alpha)) in Raman respectively. R is the "effective conjugation coordinate" and L(R)i is the content of in the i-th mode. Delta-mu-->/delta-R vanishes in pristine compounds and is large in doped and photoexcited ones; [GRAPHICS] delta((alpha))/delta-R is large for udoped chains and practically vanishing for doped ones. This statement originates from the interpretation of vibrational spectra [1] but is also supported by results of abinitio calculations made by Villars, Dupuis and Clementi [2].

引用

页码：3453 / 3456

页数：4

共 17 条

[1]

ECKARDT H, 1985, MOL CRYST LIQ CRYST, V117, P401

[2] MATRIX-ISOLATION INFRARED AND ULTRAVIOLET SPECTROSCOPIC STUDIES OF LESS STABLE CONFORMERS OF 1,3,5-HEXATRIENE [J].