Thienothiophenes copolymers

Thienothiophene Copolymers in Field Effect Transistors 657 Table 17.1 Properties of thienothiophene-containing polymers... 

M. C. Gather, M. Heeney, W. Zhang, K. S. Whitehead, D. C. C. Bradley, I. McCulloch and A. J. Campbell, An afignable fiuorene thienothiophene copolymer with deep-blue electroluminescent emission at 410 nm. Chem. Commun., 1079-1081 (2008). 

The highest mobilities achieved in solution-deposited polymer transistor devices have been exhibited by thiophene-containing polymers. Thiophene is an electron-rich, planar aromatic heterocycle, which can form a range of conjugated polymers when coupled appropriately [23, 24], The crystalline nature of many thiophene derivatives plays a role in their excellent charge transport properties. In this chapter, we will focus on copolymers of thiophene with the fused unit, thienothiophene, and their structural analogues. 

An excellent demonstration of the benefits of the self-assembly properties of liquid crystalline phases lies in the recent development of liquid crystalline, semiconducting, thiophene polymers and copolymers, many of which contain thienothiophene groups [11-17], see polymer 2, poly(2,5-bis(3-alkylthiophen-2-yl)thieno [3,2-b]thiophene) (pBTTT), for example, which exhibits exceptionally... 

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