Relaxation processes in thiophene-based random copolymers

被引：11

作者：

Bongiovanni, G

Loi, MA

Mura, A

Piaggi, A

Luzzati, S

Catellani, M

机构：

[1] Univ Cagliari, Dipartimento Sci Fisiche, I-09124 Cagliari, Italy

[2] Univ Cagliari, INFM, I-09124 Cagliari, Italy

[3] Univ Sassari, Ist Matemat & Fis, I-07100 Sassari, Italy

[4] Univ Sassari, INFM, I-07100 Sassari, Italy

[5] CNR, Ist Chim Macromol, I-20133 Milan, Italy

来源：

CHEMICAL PHYSICS LETTERS | 1998年 / 288卷 / 5-6期

关键词：

D O I：

10.1016/S0009-2614(98)00321-2

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：

The relaxation dynamics of soluble polyalkylthiophenes obtained by the random copolymerisation of 3,4-dibutylthiophene and 3-butylthiophene monomers is investigated. In these systems, the effective conjugation length, the optical gap and the non-radiative decay rate are controlled by varying the content of disubstituted monomers, the steric hindrance of which induces a twisting angle between thiophene rings. Several indications are reported in favour of spectral diffusion of the photoexcitations. Migration processes mainly occur within a few tens of picoseconds. (C) 1998 Elsevier Science B.V. All rights reserved.

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页码：749 / 754

页数：6

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