Planar-to-nonplanar conformational transition in thermochromic polythiophenes: A spectroscopic study

被引：74

作者：

Garreau, S

Leclerc, M

Errien, N

Louarn, G ^{[1
]}

机构：

[1] Univ Laval, Ctr Rech Sci & Ingn Macromol, Canada Res Chair Electroact & Photoact Polymers, Dept Chim, Ste Foy, PQ G1K 7P4, Canada

[2] Inst Mat Jean Rouxel, Lab Phys Cristalline, F-44322 Nantes 3, France

来源：

MACROMOLECULES | 2003年 / 36卷 / 03期

关键词：

D O I：

10.1021/ma021358d

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The thermochromic transition in regioregular poly(3-(2-methyl-1-butoxy)-4-methylthiophene) was characterized by UV-vis, FTIR, and Raman spectroscopies. The nonplanar yellow form of this polymer can be planarized at room temperature upon treatment with acetone vapor to yield a red polymer film. Upon heating, combined spectroscopic measurements have revealed important irreversible color changes (from red to yellow) between 75 and 95 degreesC induced by both side-chain and main-chain disordering. These measurements, in particular Raman spectroscopy, clearly indicate a significant planar-to-nonplanar conformational transition of the polythiophene backbone during the thermochromic transition.

引用

页码：692 / 697

页数：6

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