A synthetic manganese–calcium cluster similar to the catalyst of Photosystem II: challenges for biomimetic water oxidation
| Autor: | Mohammad Reza Mohammadi, Petko Chernev, Stefan Mebs, Younes Mousazade, Rahman Bikas, Holger Dau, Milosz Siczek, Tadeusz Lis, Robabeh Bagheri, Ivelina Zaharieva, Nader Noshiranzadeh, Zhenlun Song, Mohammad Mahdi Najafpour |
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| Rok vydání: | 2020 |
| Předmět: |
Models
Molecular Absorption spectroscopy Photosystem II Molecular Conformation water-oxidation reaction chemistry.chemical_element Crystal structure Manganese catalysts canning electron microscopy Inorganic Chemistry transmission electronmicroscopy Biomimetic Materials Octahedral molecular geometry Cluster (physics) chronoampero-metry 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik Photosystem II Protein Complex Water Chronoamperometry energy dispersive spectrometry Crystallography chemistry Biocatalysis Calcium Density functional theory extended X-ray absorption spectroscopy Oxidation-Reduction |
| Zdroj: | Dalton Transactions. 49:5597-5605 |
| ISSN: | 1477-9234 1477-9226 |
| Popis: | Herein, we report the synthesis, characterization, crystal structure, density functional theory calculations, and water-oxidizing activity of a pivalate Mn–Ca cluster. All of the manganese atoms in the cluster are Mn(IV) ions and have a distorted MnO6 octahedral geometry. Three Mn(IV) ions together with a Ca(II) ion and four-oxido groups form a cubic Mn3CaO4 unit which is similar to the Mn3CaO4 cluster in the water-oxidizing complex of Photosystem II. Using scanning electron microscopy, transmission electron microscopy, energy dispersive spectrometry, extended X-ray absorption spectroscopy, chronoamperometry, and electrochemical methods, a conversion into nano-sized Mn-oxide is observed for the cluster in the water-oxidation reaction. |
| Databáze: | OpenAIRE |
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