作者:Tomokazu Iyoda、Masaji Aiba、Tetsuyuki Saika、Kenichi Honda、Takeo Shimidzu
DOI:10.1039/ft9918701765
日期:——
Positively charged pyrroles incorporating the quaternized pyridine moiety, [1-methyl-3-(pyrrol-1-ylmethyl)pyridinium chloride, MPP] and [1-(5-pyrrol-3-ylpentyl)pyridinium bromide, PPP], have been synthesized. The polymer of MPP (PMPP), cationic polypyrrole obtained by chemical polymerization and electropolymerization of MPP, is soluble in various polar solvents and displays anion-exchange ability. The amount of the incorporated anionic species in PMPP is ca. five times greater than that in polypyrrole because incorporation is through anodic doping and electrostatic binding with the pyridinium moiety. The PMPP composites with anionic metal complexes and anionic polymers provide films either by the casting method or by the dipping method. These films were also obtained by electropolymerization of MPP in the presence of the anionic functional molecules. The resulting composite-modified electrodes show clear electrochromism (EL) for PMPP/FeBPS and bright electrogenerated chemiluminescence (ECL) for PMPP/RuBPS, respectively. Excellent optical properties are achieved by incorporation of a large amount of the anionic functional molecules and therefore by suppression of undesired background absorption of the PMPP matrix. Another cationic polymer of PPP showed high conductivity (10–2 S cm–1) as well as high-density incorporation of anionic functional molecules.
合成了含有四取代吡啶部分的带正电的吡咯化合物[1-甲基-3-(吡咯-1-基甲基)吡啶氯化物,MPP]和[1-(5-吡咯-3-基戊基)吡啶溴化物,PPP]。MPP的聚合物(PMPP),通过MPP的化学聚合和电聚合获得的阳离子聚吡咯,溶解于各种极性溶剂中,并表现出阴离子交换能力。PMPP中所结合的阴离子物种的数量大约是聚吡咯中所含量的五倍,因为结合是通过阳极掺杂和与吡啶阳离子部分的静电结合进行的。PMPP与阴离子金属络合物和阴离子聚合物的复合材料可以通过浇铸法或浸涂法制备成膜。这些膜也可以通过在阴离子功能分子存在下的MPP电聚合获得。所得到的复合改性电极分别对PMPP/FeBPS展现出明显的电致变色性(EL),对PMPP/RuBPS展现出明亮的电致发光(ECL)。通过大量引入阴离子功能分子,抑制了PMPP基体的不希望的背景吸收,因此实现了优异的光学特性。另一个阳离子聚合物PPP展示了高电导率(10–2 S cm–1)以及高密度的阴离子功能分子掺入。