PHOTOINDUCED ELECTRON TRANSFER BETWEEN C60/C70 AND ZINC TETRAPHENYLPORPHYRIN IN POLAR SOLVENTS
PHOTOINDUCED ELECTRON TRANSFER BETWEEN C60/C70 AND ZINC TETRAPHENYLPORPHYRIN IN POLAR SOLVENTS
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极性溶剂中 C60/C70 与四苯基卟啉锌之间的光致电子转移
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
O. Ito
中科院分区：
文献类型：
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作者：
Tatsuya Nojiri;A. Watanabe;O. Ito
通过纳秒激光光解方法，通过观察近红外区域的瞬态吸收带，研究了极性溶剂中 C60/C70 和四苯基卟啉锌 (ZnTPP) 之间的光致电子转移。 C60/C70 自由基阴离子 (C60•-/C70•-) 在近红外区域的瞬态吸收带为 ZnTPP 和 C60/C70 系统提供了电子转移的证据。在C60和C70主要被光激发的ZnTPP溶液中，电子转移发生从ZnTPP的基态到C60/C70的三线态(3C60*/3C70*)。在ZnTPP主要被光激发的浓ZnTPP溶液中，ZnTPP的三重态将电子提供给C60/C70的基态，产生C60•-/C70•-。通过3C60*/3C70*途径的电子转移效率高于通过3ZnTPP*的电子转移效率。
Photoinduced electron transfer between C60/C70 and zinc tetraphenylporphyrin (ZnTPP) in a polar solvent has been investigated with a nanosecond laser photolysis method by observing the transient absorption bands in the near-IR region. The transient absorption bands of the C60/C70 radical anion (C60•-/C70•-) in the near-IR region gave evidence of electron transfer for the system ZnTPP and C60/C70. In ZnTPP solution where C60 and C70 were photoexcited predominantly, electron transfer takes place from the ground state of ZnTPP to the triplet states of C60/C70 (3C60*/3C70*). In the concentrated ZnTPP solution where ZnTPP was predominantly photoexcited, the triplet state of ZnTPP donates the electron to the ground state of C60/C70, producing C60•-/C70•-. The efficiency of electron transfer via the 3C60*/3C70* route is higher than that via 3ZnTPP*.