Herein we report a new strategy to disperse Mn oxide into the apoenzyme of photosystem II. The compound was characterized by scanning electron microscopy, transmission electron microscopy, UV-visible spectroscopy, Fourier transform infrared spectroscopy, X-ray absorption near edge structure, extended X-ray absorption fine structure, X-ray diffraction and some electrochemical methods. Under electrochemical conditions, the peaks attributed to Mn(II)/(III), Mn(III)/(IV) and Mn(II)/(IV) were assigned and compared with other manganese oxides. Linear sweep voltammetry shows that water electro-oxidation occurs at 80 mV less than that for the apoenzyme of photosystem II. Thus, Mn oxide maintains its water-oxidizing activity under these conditions. The compound is a new type of structural and functional model for the water-oxidizing complex in photosystem II.

中文翻译：

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制造人造酶的新策略：围绕纳米氧化锰的光系统II

本文中，我们报告了一种将Mn氧化物分散到光系统II的脱辅酶中的新策略。通过扫描电子显微镜，透射电子显微镜，紫外可见光谱，傅立叶变换红外光谱，近边缘结构的X射线吸收，扩展的X射线吸收精细结构，X射线衍射和一些电化学方法来表征该化合物。在电化学条件下，峰归因于Mn（II）/（III），Mn（III）/（IV）和Mn（II）/（IV分配）并与其他锰氧化物进行比较。线性扫描伏安法表明，水的电氧化作用比光系统II的脱辅酶低80 mV。因此，Mn氧化物在这些条件下保持其水氧化活性。该化合物是光系统II中水氧化复合物的新型结构和功能模型。