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4700436 
Journal Article 
Synthesis of poly(3-hexylthiophene) by using the VO(acac)(2)-FeCl3-O-2 catalytic system 
Yu, SY; Hayakawa, T; Ueda, M 
1999 
Yes 
Chemistry Letters
ISSN: 0366-7022
EISSN: 1348-0715 
7 
559-560 
WOS:000081770000011 
Poly(3-hexylthiophene) (P3HT) was prepared by the oxidation coupling polymerization of 3-hexylthiophene (3HT) with molecular oxygen as an oxidant in the presence of vanadyl acetylacetonate (IV) (VO(acac)(2)) and ferric chloride(FeCl3). The polymerization at a molar ratio of VO(acac)(2) / FeCl3 / 3HT =1 / 2 / 5 in 1,2-dichloroethane at 0 degrees C for 164 h under oxygen gave P3HT in 61% yield. The resulting polymer gave a number average molecular weight (Mn) of 2. 1 x 10(4) (Mw I Mn = 3.0; Mw: weight average molecular weight) and a head-to-tail content of 65%. The VO(acac)(2) - FeCl3 complex is supposed to work as a catalyst.