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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Orientation-Dependent Electron Transfer Processes in Fullerene-Aniline Dyads
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Orientation-Dependent Electron Transfer Processes in Fullerene-Aniline Dyads

机译：富勒烯-苯胺双分子中取向依赖的电子转移过程

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摘要

Newly synthesized ortho- and para-substituted fullerene-aniline dyads exhibit orientation-dependent electron transfer under photoexcitation. Minimum energy conformation based on molecular mechanics calculations yield folded conformations for ortho-substituted dyads and extended ones for the para-substituted dyads. ~1H NMR studies also provided evidence for the folding of the anilinic group in the case of ortho-substituted dyads. Through-space charge transfer processes in these dyads were investigated using steady state fluorescence and lifetime measurements. The decrease in the spatial distance between the donor and acceptor moieties of the ortho-substituted dyads facilitated an efficient electron transfer. The marked increase in the singlet excited state deactivation rate constants and quantum yields of charge separation observed in the case of the ortho-substituted dyads, in polar solvents, further support a topographically controlled electron transfer process.
机译：新合成的邻位和对位取代的富勒烯-苯胺二联体在光激发下表现出取向依赖性电子转移。基于分子力学计算的最小能量构象对邻位取代的二元组产生折叠构型，对位取代的二元组产生扩展构型。 〜1 H NMR研究还为邻位取代的二元组中苯胺基团折叠提供了证据。使用稳态荧光和寿命测量研究了这些二元化合物的空间电荷转移过程。邻位取代的二元体的供体和受体部分之间的空间距离的减小促进了有效的电子转移。在极性溶剂中邻位取代的二元组中观察到的单线激发态失活速率常数和电荷分离的量子产率的显着增加，进一步支持了形貌控制的电子转移过程。

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