Fundamental electron-transfer and proton-coupled electron-transfer properties of Ru(iv)-oxo complexes

Hiroaki Kotani, Hinatsu Shimomura, Momoka Horimoto, Tomoya Ishizuka, Yoshihito Shiota, Kazunari Yoshizawa, Sachiko Yanagisawa, Yuka Kawahara-Nakagawa, Minoru Kubo, Takahiko Kojima

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Isolation and characterisation of RuIV(O) complexes were accomplished to investigate their fundamental electron transfer (ET) and proton-coupled ET (PCET) properties. Reorganisation energies (λ) in electron transfer (ET) and proton-coupled ET (PCET) from electron donors to the isolated RuIV(O) complexes have been determined for the first time to be in the range of 1.70-1.88 eV (ET) and 1.20-1.26 eV (PCET). It was suggested that the reduction of the λ values of PCET in comparison with those of ET should be due to the smaller structural change in PCET than that in ET on the basis of DFT calculations on 1 and 1e--reduced 1 in the absence and presence of TFA, respectively. In addition, the smaller λ values for the RuIV(O) complexes than those reported for FeIV(O) and MnIV(O) complexes should be due to the lack of participation of dσ orbitals in the ET and PCET reactions. This is the first example to evaluate fundamental ET and PCET properties of RuIV(O) complexes leading to further understanding of their reactivity in oxidation reactions.

Original languageEnglish
Pages (from-to)13154-13161
Number of pages8
JournalDalton Transactions
Volume48
Issue number35
DOIs
Publication statusPublished - 2019

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry

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