首页> 外文期刊>The Journal of Chemical Physics >PHOTOINDUCED ELECTRON TRANSFER REACTIONS IN MIXED FILMS OF PI-CONJUGATED POLYMERS AND A HOMOLOGOUS SERIES OF TETRACYANO-P-QUINODIMETHANE DERIVATIVES
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PHOTOINDUCED ELECTRON TRANSFER REACTIONS IN MIXED FILMS OF PI-CONJUGATED POLYMERS AND A HOMOLOGOUS SERIES OF TETRACYANO-P-QUINODIMETHANE DERIVATIVES

机译:PI共轭聚合物与均聚物系列的四甲基对苯二酚-对-二甲基异戊二烯衍生物的光诱导电子转移反应

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摘要

Near-steady-state photoinduced absorption (PIA) and photoluminescence studies are presented on photoinduced electron transfer reactions from poly[2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene vinylene] (MEH-PPV) and poly[3-(2-(3-methylbutoxy)ethyl)thiophene] (P3MBET) as donors (D) onto a homologous series of tetracyano-p-quinodimethane (TCNQ) derivatives containing fused aromatic rings as accepters (A) to systematically study the effect of acceptor electron affinity. We observe that composite films of these D/A couples give rise to long-lived charge separated states upon photoexcitation, as evidenced from the formation of polaron bands (radical cation absorption) in the PIA and the concomitant loss of the metastable triplet PIA and photoluminescence that are observed in pristine MEH-PPV and P3MBET. We find that the efficiency of the photoinduced electron transfer reaction correlates with the reduction potential of the accepters. (C) 1995 American Institute of Physics. [References: 38]
机译:对聚[2-甲氧基-5-(2'-乙基己基氧基)-1,4-亚苯基亚乙烯基](MEH-PPV)和聚[2-甲氧基-5-(2'-乙基己基氧基)-1,4-亚苯基]的光致电子转移反应进行了近稳态光致吸收(PIA)和光致发光研究。 [3-(2-(3-甲基丁氧基)乙基)噻吩](P3MBET)作为给体(D)到同源系列的四聚氰基对喹啉甲烷(TCNQ)衍生物上,其中稠合芳环作为受体(A),系统地研究受体电子亲和力的作用。我们观察到,这些D / A对的复合膜在光激发时会产生长寿命的电荷分离状态,这从PIA中极化子带的形成(自由基阳离子吸收)以及伴随而来的亚稳态三重态PIA的损失和光致发光中得到了证明。在原始的MEH-PPV和P3MBET中观察到。我们发现,光诱导电子转移反应的效率与受体的还原电位相关。 (C)1995年美国物理研究所。 [参考:38]

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