Department of Chemistry, University of Basel, St Johanns-Ring 19, 4056, Basel, Switzerland.
Angew Chem Int Ed Engl. 2018 Jan 15;57(3):841-845. doi: 10.1002/anie.201708207. Epub 2017 Dec 19.
An electron-donor-acceptor-acceptor (D-A -A ) triad has been developed that provides the first proof-of-concept for a photoinitiated molecular circuit. After photoexcitation into an optical charge-transfer transition between D and A , subsequent thermal electron-transfer from A to A is followed by geometric rearrangement in the D -A -A charge-separated state to form an ion-pair contact. This facilitates "forward" charge recombination between A and D to complete the molecular circuit with an estimated quantum efficiency of 4 % in toluene at 298 K.
一种电子给体-受体-受体（D-A-A）三联体已经被开发出来，为光引发的分子电路提供了第一个概念验证。在 D 和 A 之间的光致电荷转移跃迁被光激发后，随后 A 到 A 的热电子转移，接着在 D-A-A 电荷分离态中发生几何重排，形成离子对接触。这促进了 A 和 D 之间的“正向”电荷复合，以完成分子电路，在 298 K 的甲苯中估计量子效率为 4%。
