A new strategy to make an artificial enzyme: Photosystem II around nanosized manganese oxide

Mohammad Mahdi Najafpour; Sepideh Madadkhani; Somayyeh Akbarian; Małgorzata Hołyńska; Mohsen Kompany-Zareh; Tatsuya Tomo; Jitendra Pal Singh; Keun Hwa Chae; Suleyman Allakhverdiev

doi:10.1039/c7cy01654a

A new strategy to make an artificial enzyme: Photosystem II around nanosized manganese oxide

Mohammad Mahdi Najafpour, Sepideh Madadkhani, Somayyeh Akbarian, Małgorzata Hołyńska, Mohsen Kompany-Zareh, Tatsuya Tomo, Jitendra Pal Singh, Keun Hwa Chae, Suleyman Allakhverdiev

Research output: Contribution to journal › Article

3 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	4451-4461
Number of pages	11
Journal	Catalysis Science and Technology
Volume	7
Issue number	19
DOIs	https://doi.org/10.1039/c7cy01654a
Publication status	Published - Jan 1 2017
Externally published	Yes

ASJC Scopus subject areas

Catalysis

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Najafpour, M. M., Madadkhani, S., Akbarian, S., Hołyńska, M., Kompany-Zareh, M., Tomo, T., Singh, J. P., Chae, K. H., & Allakhverdiev, S. (2017). A new strategy to make an artificial enzyme: Photosystem II around nanosized manganese oxide. Catalysis Science and Technology, 7(19), 4451-4461. https://doi.org/10.1039/c7cy01654a

A new strategy to make an artificial enzyme : Photosystem II around nanosized manganese oxide. / Najafpour, Mohammad Mahdi; Madadkhani, Sepideh; Akbarian, Somayyeh; Hołyńska, Małgorzata; Kompany-Zareh, Mohsen; Tomo, Tatsuya; Singh, Jitendra Pal; Chae, Keun Hwa; Allakhverdiev, Suleyman.

In: Catalysis Science and Technology, Vol. 7, No. 19, 01.01.2017, p. 4451-4461.

Research output: Contribution to journal › Article

Najafpour, Mohammad Mahdi ; Madadkhani, Sepideh ; Akbarian, Somayyeh ; Hołyńska, Małgorzata ; Kompany-Zareh, Mohsen ; Tomo, Tatsuya ; Singh, Jitendra Pal ; Chae, Keun Hwa ; Allakhverdiev, Suleyman. / A new strategy to make an artificial enzyme : Photosystem II around nanosized manganese oxide. In: Catalysis Science and Technology. 2017 ; Vol. 7, No. 19. pp. 4451-4461.

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abstract = "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.",

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