Regioregular polythiophenes block copolymers containing

Alternatively, poly(3-hexylthiophene)-f -polystyrene was prepared by anionic polymerization [247]. Mei-jer and co-workers reported the use of allyl-terminated regioregular poly(3-hexylthiophene) as a chain transfer agent in ring-opening metathesis polymerization (ROMP) of cyclooctene. Subsequent hydrogenation yielded poly(3-hexylthiophene)-f -polyethylene [248]. 

Phase separation and organization into nanofibrillar domains has been observed by AFM. 

The HT architecture fortuitously balances several factors in poly(3-alkylthiophene)s. Defects engage steric mechanisms that distort conformation, attenuate orbital overlap and disrupt packing. Their elimination from the HT architecture affords a material prone to planarization and self-assembly, leading to organized aggregates and, ultimately, domains with high intermolecular orbital overlap. 

McCullough and P. C. Ewbank. Regioregular, head-to-tail coupled poly(3-alkylthiophene) and its derivatives, in Handbook of Conducting Polymers, 2nd edn, ed. T. A. Skotheim, R. L. Elsenbamner and J. R. Reynolds, Marcel Dekker, New York, 1998, pp. 225-258. 

McCullough. The chemistry of conducting polythiophenes from synthesis to self-assembly to intelligent materials, in Handbook ofOligo- and Polythiophenes, ed. D. Fichou, 1999, pp. 1-44. 

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