Study of concerted electron, excitation and proton transfer mediated by a midway molecule in biological systems

我们建立了一个理论上的一般表达式的协调过程的速率常数介导的中间分子，并解释了实验数据在一个人工系统实现的各个阶段的协调过程。在此基础上，我们解释了绿色植物和藻类光合作用初级过程中重要的三个过程的实验数据，表明它们是中间分子介导的协同过程，并计算了它们的速率常数。它们是通过在光系统II的反应中心形成电荷分离态从天线系统固定激发能的过程，通过从电荷分离态偶然的电荷重组形成自旋三重态的过程，以及通过产生活性氧分子去除危险的三重态的过程。

We constructed a theory on a general expression of the rate constant of concerted processes mediated by a midway molecule, and explained experimental data in an artificial system realizing various phases of the concerted processes. Based on this general expression, we explained experimental data in following three processes important in primary processes of photosynthesis in green plants and algae by showing them to be concerted ones in mediation of a midway molecule and calculating their rate constants. They are the process of excitation-energy fixing from the antenna system by charge-separated-state formation in the reaction center of photosystem II, that of formation of a spin triplet state by occasional charge recombination from the charge-separated state, and that of removing the triplet state which is hazardous by generating active oxygen molecules.