The Wittig reactions between benzo[c]thiophene-1,3-dicarbaldehyde(2)and 2,5-dialkyloxy-p-xylylenebis (triphenylphosphonium bromide)s(7)were carried out to obtain poly (1,3-benzo[c]thiophenediylvinylene-alt-2,5-dialkyloxy-1,4-phenylenevinylene)s (8), where aklyloxy is hexyloxy (8a), octyloxy (8b), or dodecyloxy (8c). The longer the alkyloxy group, the higher the degree of polymerization of the product. The optical band gap of poly (1,3-benzo[c]thiophenediylvinylene-alt-2,5-didodecyloxy-1,4-phenylenevinylene) (8c)was found to be 1.7 eV. This value was much lower than that of poly (1,4-phenylenevinylene-alt-2,5-didodecyloxy-1,4-phenylenevinylene) (2.5 eV).
雑誌名
Research reports of the Faculty of Engineering, Mie University
Synthesis of Poly(arylenevinylene)s Carrying Benzo[C]-thiophene as Arylene Unit
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