Effect of metal ion substitution on the catalytic activity of a pentanuclear metal complex

Takuya Akai; Mio Kondo; Sze Koon Lee; Hitoshi Izu; Takafumi Enomoto; Masaya Okamura; Yutaka Saga; Shigeyuki Masaoka

doi:10.1039/c9dt04684d

Effect of metal ion substitution on the catalytic activity of a pentanuclear metal complex

Dalton Trans. 2020 Feb 7;49(5):1384-1387. doi: 10.1039/c9dt04684d. Epub 2020 Jan 15.

Authors

Takuya Akai¹, Mio Kondo², Sze Koon Lee³, Hitoshi Izu¹, Takafumi Enomoto³, Masaya Okamura³, Yutaka Saga², Shigeyuki Masaoka²

Affiliations

¹ Division of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan. masaoka@chem.eng.osaka-u.ac.jp and Department of Life and Coordination-Complex Molecular Science, Institute for Molecular Science (IMS), 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan and Department of Structural Molecular Sciences, SOKENDAI [The Graduate University for Advanced Studies], Shonan village, Hayama, Kanagawa 240-0193, Japan.
² Division of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan. masaoka@chem.eng.osaka-u.ac.jp.
³ Department of Life and Coordination-Complex Molecular Science, Institute for Molecular Science (IMS), 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan.

PMID: 31939972
DOI: 10.1039/c9dt04684d

Abstract

A pentanuclear cobalt complex that consists of five cobalt ions and six bpp^- ligands (Co5, Hbpp = 3,5-bis(2-pyridyl)pyrazole) was synthesized and crystallographically characterized. Electrochemical measurements indicate that Co5 has multielectron transfer ability. We also found that Co5 reduces CO₂ to CO under photoirradiation in the presence of a photosensitizer.