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Superoxide Disproportionation Driven by Zinc Complexes with Various Steric and Electrostatic Properties

Authors

  • Dr. Akira Wada,

    1. Department of Life and Materials Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555 (Japan)
    2. RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
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  • Prof. Dr. Koichiro Jitsukawa,

    1. Department of Life and Materials Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555 (Japan)
    2. Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531 (Japan)
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  • Prof. Dr. Hideki Masuda

    Corresponding author
    1. Department of Life and Materials Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555 (Japan)
    • Department of Life and Materials Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555 (Japan)

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  • This research was supported in part by Grants-in-Aid for Scientific Research and the JSPS (Japan). The authors thank Dr. Yuko Wasada-Tsutsui for her assistance in DFT calculations.

Abstract

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Attractive models: Synthetic ZnII complexes were investigated as models of copper–zinc superoxide dismutase. Superoxide underwent a unique disproportionation reaction in the electrostatic sphere of the complexes (see picture; bpy=2,2′-bipyridyl). The effectiveness of the ZnII complexes in inducing the disproportionation of superoxide depended on both the Lewis acidity and the coordination geometry of the Zn center.

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