Electrochemical synthesis of soluble poly(9-hexylfluorene) and poly(1-hexylindene)
作者:Junzo Matsuda、Kunitsugu Aramaki、Hiroshi Nishihara
DOI:10.1039/ft9949000321
日期:——
Electrochemical oxidation of 9-hexylfluorene and 1-hexylindene in 0.1 mol dm–3 Bu4NBF4–nitromethane affords π-conjugated polymers, PHF and PHI, respectively, which are fusible and soluble in common organic solvents. Electrode materials affect the formation of the polymers significantly; the molecular weight of PHF increases in the order, glassy carbon (GC) < indium–tin oxide (ITO)⩽ SnO2, and that for PHI, SnO2 GC < ITO. 1 H NMR and IR spectra of the polymers indicate that PHF and PHI comprise mainly linkage of 1,4-fluorenylene and 2, 4-indenylene units, respectively. PHF undergoes a reversible oxidation reaction in acetonitrile, whereas electrochemical oxidation of PHI is irreversible. The electrical conductivities of PHF and PHI doped with SO3 are 10–5 and 10–6 S cm–1, respectively, at room temperature.
在0.1 mol dm–3的Bu4NBF4–硝基甲烷中,对9-己基荧蒽和1-己基茴香进行电化学氧化,分别得到可熔融且可溶于常见有机溶剂的π-共轭聚合物PHF和PHI。电极材料对聚合物的形成影响显著;PHF的分子量随顺序增加为,玻璃碳(GC) < 铟锡氧化物(ITO)⩽ SnO2,而PHI的分子量则为,SnO2 GC < ITO。聚合物的1H NMR和IR光谱表明,PHF和PHI主要由1,4-荧蒽烯和2,4-茴香烯单元的连接组成。PHF在乙腈中经历可逆氧化反应,而PHI的电化学氧化是不可逆的。PHF和PHI在室温下掺杂SO3后的电导率分别为10–5和10–6 S cm–1。