Planar-to-Nonplanar Conformational Transition in Thermochromic Polythiophenes:  A Spectroscopic Study

Planar-to-Nonplanar Conformational Transition in Thermochromic Polythiophenes:  A Spectroscopic Study

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...

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Veröffentlicht in:Macromolecules 2003-02, Vol.36 (3), p.692-697
Hauptverfasser: Garreau, S, Leclerc, M, Errien, N, Louarn, G
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Sprache:eng
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Applied sciences
Electrical, magnetic and optical properties
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
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container_title Macromolecules
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creator Garreau, S
Leclerc, M
Errien, N
Louarn, G
description 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 °C 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.
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subjects Applied sciences
Electrical, magnetic and optical properties
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
title Planar-to-Nonplanar Conformational Transition in Thermochromic Polythiophenes:  A Spectroscopic Study
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