The synthesis, electrochemical, spectroelectrochemical, photophysical and light induced electron transfer reactions in two new anthanthrene quinodimethanes have been studied and analyzed in the context of dynamic electrochemistry. Their properties are dependent on the interconversion between folded and twisted forms, which are separated by a relatively small energy range, thus allowing to explore their interconversion by variable temperature measurements. The photophysics of these molecules is mediated by a diradical excited state with a twisted structure that habilitates rapid intersystem crossing. Moreover, when codissolved with an electron acceptor compound such as PCBM, direct anthanthrene to PCBM electron transfer and back-electron transfer are also observed, resulting in the formation of charged states and, then, a raise in the population of the excited state triplet manifold upon charge recombination. Some of these properties have been interpreted with the help of quantum chemical calculations. The existence of an equilibrium between folded and twisted states upon electrochemical and photoexcitation stimuli represents a novelty in comparison with existing literature on compounds also showing dynamic electrochemical properties.

中文翻译：

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折叠扭曲机制控制蒽-喹二甲烷的动态氧化还原特性、光物理和电子转移


在动态电化学的背景下，对两种新型蒽喹二甲烷中的合成、电化学、光谱电化学、光物理和光诱导电子转移反应进行了研究和分析。它们的特性取决于折叠和扭曲形式之间的相互转换，它们被相对较小的能量范围隔开，因此允许通过可变温度测量来探索它们的相互转换。这些分子的光物理学是由具有扭曲结构的双自由基激发态介导的，该态使快速系统间交叉成为可能。此外，当与电子受体化合物（如 PCBM）共溶解时，还观察到直接蒽到 PCBM 的电子转移和背电子转移，导致带电态的形成，然后，在电荷复合时激发态三重态流形的数量增加。其中一些特性已经在量子化学计算的帮助下得到了解释。与同样显示动态电化学特性的化合物的现有文献相比，在电化学和光激发刺激下折叠和扭曲态之间存在平衡是一种新颖性。