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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Characterization of the Giant Transient Dipole Generated by Photoinduced Electron Transfer in a Carotene-Porphyrin-Fullerene Molecular Triad
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Characterization of the Giant Transient Dipole Generated by Photoinduced Electron Transfer in a Carotene-Porphyrin-Fullerene Molecular Triad

机译:胡萝卜素-卟啉-富勒烯分子三联体中光诱导电子转移产生的巨型瞬态偶极子的表征

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摘要

Excitation of a carotenoid (C) porphyrin (P) fullerene (C_(60)) molecular traid yields the porphyrin first excited singlet state, C-~1P-C_(60), which decays via a sequential two-step photoinduced electron-transfer process into a C~(·+)-P-C_(60)~(·-) charge-separated state with a lifetime of 340 ns in 2-methyltetrahydrofuran solution. The transient dc photocurrent method has been used to investigate the dipole moment of the charge-separated state in tetrahydrofuran and 2-methyltetrahydrofuran. The results show formation of a giant dipole with a moment in excess of 150 D, corresponding to separated charges located on the fullerene and carotene moieties of the triad.
机译:激发类胡萝卜素(C)卟啉(P)富勒烯(C_(60))分子traid产生卟啉的第一激发单重态C-〜1P-C_(60),其通过连续的两步光致电子转移而衰减在2-甲基四氢呋喃溶液中,反应过程变为具有340 ns寿命的C〜(·+)-P-C_(60)〜(·-)电荷分离态。瞬态直流光电流法已被用于研究四氢呋喃和2-甲基四氢呋喃中电荷分离态的偶极矩。结果表明,形成了一个矩矩超过150 D的巨型偶极子,对应于三合体的富勒烯和胡萝卜素部分上的分离电荷。

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