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作 者:陈浩[1] 蔡显荣[1] 张涛[1] 徐志刚[1] 宋保风[1] 李瑛[1] 蒋青[1] 谢明贵[1]
机构地区:[1]四川大学化学学院,成都610064
出 处:《化学学报》2008年第7期788-792,共5页Acta Chimica Sinica
基 金:教育部重点项目(No.105142);教育部博士点基金(No.2030610069);四川省青年科技基金(No.03SQ04)资助项目
摘 要:通过钯催化的Heck偶联缩聚反应,合成了两种新的主链含对苯二乙炔,2-吡喃-4-烯-丙二腈衍生物的共轭聚合物.研究了其紫外-可见吸收特性及电化学性质,并考察了聚合物和TiO2组成的体相异质结薄膜的荧光性质.研究结果表明,目标聚合物的紫外吸收比相应的聚对苯撑乙烯/对苯撑乙炔(PPV/PEE)聚合物红移了约80nm,表明该体系的光谱吸收能更好地与太阳光谱能量分布相匹配.聚合物和TiO2组成的体相异质结薄膜随着TiO2量的增加荧光逐渐减弱,表明它们之间存在强的光诱导电子效应.A series of novel copolymers derived from phenylene-bi(ethynylene) and 2-(pyran-4- ylidene)-malononitrile were synthesized successfully through a palladium-catalyed Heck-cross coupling reaction. The electrochemical and photophysical properties were investigated, and the results show that these copolymers are red-shifted 80 nm compared with poly(phenylene-vinylene)/poly(phenylene-ethynylene), which indicated that their spectral response was more matching with the solar-terrestrial radiation. The PL spectra of copolymer P2:TiO2 bulk-heterojunction decreased with increasing amount of Ti(OC3HT)4 compared to that of a pristine copolymer film. This indicates the existence of strong photoinduced electronic interactions between the polymers P2 and TiO2.
分 类 号:TM910.4[电气工程—电力电子与电力传动]
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