Direct Detection of Hole Migration along the Polymer Chain: Poly(N-vinylcarbazole) in 1,2-Dichloroethane Solution As Revealed by Picosecond Transient Absorption and Dichroism Measurements
Direct Detection of Hole Migration along the Polymer Chain: Poly(N-vinylcarbazole) in 1,2-Dichloroethane Solution As Revealed by Picosecond Transient Absorption and Dichroism Measurements
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直接检测沿聚合物链的空穴迁移：皮秒瞬态吸收和二色性测量揭示 1,2-二氯乙烷溶液中的聚（N-乙烯基咔唑）
DOI：
10.1021/jp960549d
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
A. Itaya
中科院分区：
文献类型：
--
作者：
H. Miyasaka;T. Moriyama;A. Itaya
皮秒瞬态吸收光谱和瞬态二向色性测量用于直接阐明聚（N-乙烯基咔唑）（PVCz）−电子受体以及相应的单体模型系统N-乙基咔唑−电子受体在1，2-二氯乙烷溶液中的光诱导电子转移动力学（电荷分离，电荷复合和空穴转移反应）。在单体模型体系中测量离子对吸收的二向色性表明，阴离子和阳离子的转动弛豫时间常数是相同的，表明离子对中离子的相互几何构型至少在转动弛豫过程中是保持不变的.在聚合物体系中，阳离子的二色性信号的衰减比阴离子的衰减快得多，表明快速的空穴迁移过程减弱了PVCz链中咔唑基（Cz）阳离子的二色性信号。The electron-transm.
Picosecond transient absorption spectroscopy and transient dichroism measurements were applied for the direct elucidation of photoinduced electron-transfer dynamics (charge separation, charge recombination, and hole-transfer reactions) in poly(N-vinylcarbazole) (PVCz)−electron acceptors as well as the corresponding monomer model system N-ethylcarbazole−electron acceptors in 1,2-dichloroethane solution. The measurement of the dichroism of the ion-pair absorption in the monomer model system demonstrated that the time constants of the rotational relaxation of the anion and the cation were identical with each other, indicating that the mutual geometry of the ions in the pair was maintained at least during the rotational relaxation process. In the polymer systems, the decay of the dichroism signal of the cation was much faster than that of the anion, indicating that the rapid hole-migration process diminished the dichroism signal of the cation of the carbazolyl (Cz) groups in the PVCz chain. The electron-trans...