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首页> 外文期刊>Physical chemistry chemical physics: PCCP >Photoinduced electron transfer in supramolecular donor-acceptor dyads of Zn corrphycene
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Photoinduced electron transfer in supramolecular donor-acceptor dyads of Zn corrphycene

机译：锌茂金属超分子供体-受体二元组中的光诱导电子转移

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摘要

Porphyrins have been used by various researchers as important building blocks of photofunctional molecules, while the number of studies on the excitation properties of the structural isomers of porphyrins is small when compared to those of porphyrins. In the present study, photoinduced electron transfer (ET) processes of supramolecular donor-acceptor dyads of 2,3,6,7,11,12,17,18-octaethylcorrphycenatozinc (ZnCn), one of the porphyrin isomers, and some imide compounds, which can coordinate to the central Zn ion as an electron acceptor, were investigated. Formation of the supramolecular donor-acceptor dyads was confirmed by steady state absorption change. Charge separation and charge recombination processes upon photoexcitation of ZnCn of the supramolecular dyads were successfully observed by subpicosecond laser flash photolysis. The estimated ET rates (k_(ET)) were compared with those of other porphyrin isomers. Differences in the driving force dependence of k_(ET) values of porphyrin isomers were attributed to the electronic coupling and internal reorganization energy. Electronic and structural factors, which brought about the difference in k_(ET) values, were reasonably explained on the basis of the theoretical calculation.
机译：卟啉已被许多研究人员用作光功能分子的重要组成部分，而与卟啉相比，对卟啉结构异构体的激发性质的研究数量很少。在本研究中，卟啉异构体之一的2,3,6,7,11,12,17,18-八乙基corrphycenatozinc（ZnCn）的超分子供体-受体二元组的光诱导电子转移（ET）过程可以与作为电子受体的中心Zn离子配位的化合物进行了研究。稳态吸收变化证实了超分子供体-受体二元组的形成。亚皮秒激光闪光光解成功地观察了超分子二倍体ZnCn光激发后的电荷分离和电荷重组过程。将估计的ET率（k_（ET））与其他卟啉异构体的ET率进行比较。卟啉异构体的k_（ET）值的驱动力依赖性的差异归因于电子耦合和内部重组能。在理论计算的基础上，合理地解释了导致k_（ET）值不同的电子和结构因素。

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