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Polythiophene-graft-Styrene and Polythiophene-graft-(Styrene-graft-C60) Copolymers

✍ Scribed by Xiwen Chen; Bobak Gholamkhass; Xu Han; George Vamvounis; Steven Holdcroft

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
205 KB
Volume
28
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Poly(3‐hexylthiophene) was quantitatively brominated and subsequently used in the Suzuki cross‐coupling with a boronic ester of a nitroxide to form a macroinitiator bearing a TEMPO group on each thienyl ring. This macroinitiator initiated the nitroxide‐mediated radical polymerization of styrene and 4‐chloromethylstyrene (CMS), and subsequently reacted with C~60~ to yield soluble graft, rod‐coil polymers. Films of the polymers display a bi‐continuous phase structure as revealed by AFM. Similar polymers, in which only a fraction of the thienyl units boasted C~60~‐bearing side chains, displayed optical properties representative of extensive π‐delocalization. The potential application of this methodology for the synthesis of graft polymers for photovoltaic devices is discussed.

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