Electronic and dynamical effects from the unusual features of the Raman spectra of oligo and polythiophenes

被引:110
作者
Agosti, E
Rivola, M
Hernandez, V
Del Zoppo, M
Zerbi, G
机构
[1] Politecn Milan, Dipartimento Chim Ind, I-20133 Milan, Italy
[2] Univ Malaga, Dept Quim Fis, E-29071 Malaga, Spain
关键词
polyconjugated molecules; oligothiopenes; polythiopenes;
D O I
10.1016/S0379-6779(98)00167-2
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A comprehensive search for structure/property correlations in the Raman spectra of oligo and polythiophenes is carried out for many homologous series of oligothiophenes (approximately 50 compounds). The observed spectroscopic features are interpreted, with the help also of ab initio calculations, on the basis of the theories currently adopted for the understanding of the properties of polyconjugated materials. From the analysis of the vibrational spectra the behavior of pi electrons as function of conjugation length (electron-phonon coupling, pinning, effective electronegativity of the heteroatoms, etc.) is discussed and frequency and intensity correlations useful in chemical diagnosis are proposed. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:101 / 112
页数:12
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