Electronic deactivation in single chains, nano-aggregates and ultrathin films of conjugated oligomers

被引：168

作者：

Oelkrug, D

Egelhaaf, HJ

Gierschner, J

Tompert, A

机构：

[1] Institute of Physical Chemistry, University of Tübingen, D-72076 Tübingen

来源：

SYNTHETIC METALS | 1996年 / 76卷 / 1-3期

关键词：

electronic deactivation; oligomers; fluorescence;

D O I：

10.1016/0379-6779(95)03464-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fluorescence spectra, quantum yields Phi(F), decay curves, and fluorescence anisotropies of oligothiophenes and oligophenylenevinylenes with varying chain lengths are determined in the dissolved state, in nano-aggregates acid in ultrathin films. Phi(F) decreases in the series monomer > aggregate approximate to disordered film > oriented film by four powers of ten, whereas the average decay times remain unchanged. The orientational relaxation time is 35 ps in condensed oligothiophenes. The strong increase of Phi(F) with disorder is mainly attributed to the increasing density of luminescence centers.

引用

页码：249 / 253

页数：5

共 21 条

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