STABLE POLARONS IN POLYACETYLENE OLIGOMERS - OPTICAL-SPECTRA OF LONG POLYENE RADICAL CATIONS

被引：83

作者：

BALLY, T ^{[1
]}

ROTH, K ^{[1
]}

TANG, W ^{[1
]}

SCHROCK, RR ^{[1
]}

KNOLL, K ^{[1
]}

PARK, LY ^{[1
]}

机构：

[1] MIT,DEPT CHEM,CAMBRIDGE,MA 02139

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 1992年 / 114卷 / 07期

关键词：

D O I：

10.1021/ja00033a020

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The radical cations of tert-butyl-capped polyenes containing 3-13 conjugated double bonds were generated radiolytically in Freon matrices and investigated by electronic absorption spectroscopy. The observed spectra are in accord with a qualitative MO/CI model which predicts two bands of disparate intensity which both undergo a shift to lower energies as the chain grows longer. Extrapolation to infinite chain length leads to an energy of approximately 0.4 eV for the second, intense band and approximately 0.1 eV for the first, weak band. This finding and its implications with regard to the structure of polarons in polyenes and the nature of doped and/or photoexcited polyacetylene are discussed.

引用

页码：2440 / 2446

页数：7

共 58 条

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