摘要
对一类以双酚A为连接链,9,10-二甲氧基蒽为电子给体,带不同取代基的苯为电子受体的给体-受体体系的光致电子转移反应的重组能进行了理论计算研究,获得与实验值接近的结果,说明所用的理论计算方法具有可行性。
Photoinduced intramolecular electron transfer reorganization energies involved in a series of electron donor-acceptor systems have been investigated by theoretical calculations according to quantum mechanics treatments of electron transfer.The systems consist of 9,10-dimethoxyanthrecene as electron donor and benzyl group substituted with different electron with drawing groups as electron acceptors linked by Biphenol A.The inner-sphere reoeganization energies were caculated by H f -change method together with the bond-length change method based on the gemetry of the electron donors and electron acceptors before and after electron transfer optimized by AM1 semiempirical quantum chemical method.The outer-sphere reorganization energies were caculated using the radii of the donors and acceptor and the center-to-centor distance between them based on the geometries of the donors and acceptors optimized by the AM1 quantum mechanics method and the geometries of the donor-acceptor systems optimized by the NMX molecular mechanics method respectively.The total reorganization energy calculations are in good agreement with experiment vlues indicating that all the methods used are feasible.
基金
国家自然科学基金
关键词
分子内电子转移
重组能
光致
电子转移
DMAN
Intramolecular electron transfer\ Reorganization energy\ The organic dyads