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Mimicking the Oxygen-Evolving Center in Photosynthesis

The oxygen-evolving center (OEC) in photosystem II (PSII) of oxygenic photosynthetic organisms is a unique heterometallic-oxide Mn(4)CaO(5)-cluster that catalyzes water splitting into electrons, protons, and molecular oxygen through a five-state cycle (S(n), n = 0 ~ 4). It serves as the blueprint fo...

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Detalles Bibliográficos
Autores principales: Chen, Yang, Xu, Boran, Yao, Ruoqing, Chen, Changhui, Zhang, Chunxi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9302449/
https://www.ncbi.nlm.nih.gov/pubmed/35874004
http://dx.doi.org/10.3389/fpls.2022.929532
Descripción
Sumario:The oxygen-evolving center (OEC) in photosystem II (PSII) of oxygenic photosynthetic organisms is a unique heterometallic-oxide Mn(4)CaO(5)-cluster that catalyzes water splitting into electrons, protons, and molecular oxygen through a five-state cycle (S(n), n = 0 ~ 4). It serves as the blueprint for the developing of the man-made water-splitting catalysts to generate solar fuel in artificial photosynthesis. Understanding the structure–function relationship of this natural catalyst is a great challenge and a long-standing issue, which is severely restricted by the lack of a precise chemical model for this heterometallic-oxide cluster. However, it is a great challenge for chemists to precisely mimic the OEC in a laboratory. Recently, significant advances have been achieved and a series of artificial Mn(4)XO(4)-clusters (X = Ca/Y/Gd) have been reported, which closely mimic both the geometric structure and the electronic structure, as well as the redox property of the OEC. These new advances provide a structurally well-defined molecular platform to study the structure–function relationship of the OEC and shed new light on the design of efficient catalysts for the water-splitting reaction in artificial photosynthesis.