Polythiophenes regioregular polymers

Regioregular polythiophenes with various side chains containing ether, ester, and thiol units had been synthesized, and showed interesting properties [330]. However, the polydispersity of these polymers was not con-... 

Molecular self-organization in solution depends critically on molecular structural features and on concentration. Molecular self-organization or aggregation in solution occurs at the critical saturation concentration when the solvency of the medium is reduced. This can be achieved by solvent evaporation, reduced temperature, addition of a nonsolvent, or a combination of all these factors. Solvato-chromism and thermochromism of conjugated polymers such as regioregular polythiophenes are two illustrative examples, respectively, of solubility and temperature effects [43-45]. It should therefore be possible to use these solution phenomena to pre-establish desirable molecular organization in the semiconductor materials before deposition. Our studies of the molecular self-assembly behavior of PQT-12, which leads to the preparation of structurally ordered semiconductor nanopartides [46], will be described. These PQT-12 nanopartides have consistently provided excellent FETcharacteristics for solution-processed OTFTs, irrespective of deposition methods. 

Kim Y, Cook S, Tuladhar SM, Choulis SA, Nelson J, Durrant JR, Bradley DDC, Giles M, McCulloch 1, Ha C-S, Ree M (2006) A strong regioregularity effect in selforganizing conjugated polymer films and high-efficiency polythiophene fullerene solar cells. Nat Mater 5 197... 

Stokes, K.K., Henze, K., and McCullough, R.D., New phosphonic acid functionalized, regioregular polythiophenes. Macromolecules 36, 7114—7118, 2003. lovu, M.C. et al., Regioregular poly(3-alkylthiophene) conducting block copolymers, Polymer 46, 8582-8586, 2005. 

Reitzel, N. et al.. Self-assembly of conjugated polymers at the air/water interface. Structure and properties of Langmuir and Langmuir-Blodgett films of amphiphilic regioregular polythiophenes, J. Am. Chem. Soc. 122, 5788-5800, 2000. de Boer, B. et al.. Amphiphilic, regioregular polythiophenes. Macromolecules 35, 6883-6892, 2002. 

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