Symmetry Effects in Photoinduced Electron Transfer in Chlorin‐Quinone Dyads: Adiabatic Suppression in the Marcus Inverted Region
作者:Yvonne Abel、Ivan Vlassiouk、Enno Lork、Sergei Smirnov、Marat R. Talipov、Franz‐Peter Montforts
DOI:10.1002/chem.202002736
日期:2020.12.18
donor–acceptor dyads undergoing photoinduced electron transfer (PET), a direction or pathway for electron movement is usually dictated by the redox properties and the separation distance between the donor and acceptor subunits, while the effect of symmetry is less recognized. We have designed and synthesized two isomeric donor–acceptor assemblies in which electronic coupling between donor and acceptor is altered
在经历光致电子转移(PET)的供体-受体二元组中,电子运动的方向或途径通常由氧化还原特性和供体与受体亚基之间的分隔距离决定,而对称性的作用则鲜为人知。我们设计并合成了两个异构体供体-受体组件,其中供体和受体之间的电子耦合通过轨道对称控制而改变,并且重组能和电荷转移放热度保持不变。DFT和TD-DFT计算支持的光学吸收和发光光谱分析表明,这些组件中的PET对应于Marcus反向区域(MIR),并且对于电子耦合较弱的异构体具有更高的比率。