Ester-functionalized poly(3-alkylthienylene)s: Substituent effects on the polymerization with FeCl3

被引:50
作者
Bizzarri, PC
Andreani, F
DellaCasa, C
Lanzi, M
Salatelli, E
机构
[1] Dipartimento di Chimica Industriale e dei Materiali, Università di Bologna, I-40136 Bologna
关键词
esters; poly(3-alkylthienylene); polymerization;
D O I
10.1016/0379-6779(95)03401-5
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Ester-functionalized poly(3-alkylthienylene)s were obtained by chemical oxidation with FeCl3. Substituents with both different total length and different distance of the ester group from the thiophene ring were examined. The main reaction solvent studied was chloroform which gave polymers with high molecular weight and incomplete conversion of the monomer. Some polymers were synthesized with a new procedure involving the precipitation of FeCl3 from a saturated nitromethane solution by a tetrachloride solution of the monomer. In this way, lower molecular weights and complete monomer conversion were obtained. The effect of different substituent groups on the polymer microstructure was examined using H-1 NMR spectroscopy. With both polymerization procedures, the regioregularity and absorption maximum in the visible spectrum increase with increasing length of the oligomethylenic spacer between thiophene ring and ester group.
引用
收藏
页码:141 / 147
页数:7
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