Synthesis of Regioregular Poly 3-alkylthiophene

For this reason, in the early nineties, intensive research efforts have been directed towards the synthesis of regioregular poly(3-alkylthiophenes). Two successful methods have been proposed independently. McCullough et al. [11,39] fabricated regioregular poly(3-alkylthiophenes) from 2-bromo-3-alkylthio-phenes via the regiospecific condensation of appropriately prepared Grignard reagent in the presence of a... 

M. C. lovu, E. E. Sheinsi, R. R. Gil, R. D. McCullough, Experimental Evidence for the Quasi- living Nature of the Grigucud Metathesis Method for the Synthesis of Regioregular Poly(3-Alkylthiophenes). Macromolecules 2005, 38, 8649-8656. 

Figure 2.4 Dependence of molecular weights and polydispersities on conversion for 2-bromo-5-chloromagnesium-3-hexylthiophene Grignard metathesis polymerization at variable Ni(dppp)Cl2 concentrations [M]q = 0.07 mol THE 23-25°C. Reprinted with permission from M. C. lovu, E. E. Sheina, R. R. Gil and R. D. McCullough. Experimental evidence for the quasi- living nature of the Grignard metathesis method for the synthesis of regioregular poly(3-alkylthiophenes). Macromolecules 38(21), 8649-8656 (2005). Copyright 2005 American Chemical Society...

M. C. lovu and R. D. McCullough. Quasi-living Grignard metathesis polymerization for the synthesis of regioregular poly(3-alkylthiophene)s. Polym. Prepr. (Am. Chem. Soc., Div. Polym. Chem.) 47(1), 242-243 (2006). 

Scheme 65 Synthesis of regioregular poly(3-alkylthiophene)-based copolymers [97, 98]...

Jeffries-El, M., Sauve, G., and McCullough, R.D., Facile synthesis of end-functionalized regioregular poly(3-alkylthiophene)s via modified Grignard metathesis reaction, Macromolecules 38, 10346-10352, 2005. 

Scheme 2.8 Synthesis of block copolymers containing regioregular poly(3-alkylthiophene)s using allyl terminated polymer as precursor...

A. Iraqi and G. W. Barker. 1998. Synthesis and characterization of telechelic regioregular poly(3-alkylthiophenes). / Mater Chem 8(l) 25-29. 

Iraqi, A., Barker, G.W, 1998. Synthesis and characterisation of telechelic regioregular head-to-tail poly(3-alkylthiophenes). J. Mater. Chem. 8,25-29. 

SCHEME 9.1 The McCullough method for the regioregular synthesis of poly(3-alkylthiophene) (P3AT) with 100% head-to-tail couplings. 

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