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Structure and Segmental Motions in a Substituted Polythiophene: A Solid-State NMR Study

✍ Scribed by Nolwenn Le Bouch; Michèle Auger; Mario Leclerc

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
220 KB
Volume
209
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Thermochromic poly[3‐(2‐methyl‐1‐butoxy)‐4‐methylthiophene] has been investigated in the solid state. Some important changes have been observed by UV‐Vis absorption and XRD measurements. Solid‐state NMR spectroscopy, which has the ability to provide information about the structure and dynamics of polymers over a wide range of length scales and time scales, has been utilized to better understand the motion of polythiophene chains during this thermochromic transition. Different solid‐state NMR analyses led to the determination of the relaxation rates for the main chain and the side chain as well as to the characterization of a twisting of the conjugated backbone chain during the thermochromic transition.

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