Max Planck Institute for Chemical Energy Conversion, Mülheim an der Ruhr, Germany.
Angew Chem Int Ed Engl. 2012 Sep 24;51(39):9935-40. doi: 10.1002/anie.201204705. Epub 2012 Aug 21.
Using models derived from the X-ray structure of photosystem II, it is shown that the oxygen evolving complex in the S(2) state exists in two energetically similar and interconvertible forms. A longstanding question regarding the spectroscopy of the catalyst is thus answered: one form corresponds to the multiline g=2.0 EPR signal (see picture, right; O red, Mn purple, Ca yellow), and the other to the g≥4.1 signals (left).
利用从光合作用 II 型的 X 射线结构得到的模型，证明了处于 S2 态的放氧复合物以两种能量相似且可相互转换的形式存在。这一问题的答案长期以来一直是该催化剂光谱学领域的未解之谜：其中一种形式对应于多线 g=2.0 EPR 信号（见右图，O 为红色，Mn 为紫色，Ca 为黄色），另一种则对应于 g≥4.1 的信号（左图）。
