論文

査読有り
2016年

Water Oxidation Catalyzed by a Ruthenium Complex with an Ru–C Bond

ChemistrySelect
  • Tohru Wada
  • ,
  • Takahide Hiraide
  • ,
  • Yuji Miyazato

1
12
開始ページ
3045
終了ページ
3048
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1002/slct.201600716
出版者・発行元
Wiley-Blackwell

We prepared a new Ru(III) complex with a covalent bond between the central Ru and C of the ligand, [RuCl(dpp)(bpy)]Cl ([1]Cl, dpp=2,6-dipyridylphenyl, bpy=2,2’-bipyridine), through the reaction of [(η6-C6H6)RuCl(bpy)]Cl with one equivalent of 1,3-di(pyrid-2-yl)benzene. X-ray analysis of a single crystal of [1](PF6), which was prepared via the anion exchange of [1]Cl, revealed the short Ru–C bond length of [1]+. [1]Cl was easily hydrolyzed in a neutral water solution to the hydroxo complex, [Ru(OH)(dpp)(bpy)]+ ([2]+). Cyclic voltammetry of [1]+ showed that the Ru(II)/Ru(III) potential of [1]+ was more negative than that of the 2,2’:6’,2”-terpyridine (trpy) analogue, [RuCl(bpy)(trpy)](ClO4), by –770 mV under the same conditions. Moreover, the Ru(V)=O species, which is a key intermediate of water oxidation, was produced by electrochemical oxidation of [2]+ at an extremely negative potential (+0.80 V vs. saturated calomel electrode). [2]+ catalyzed water oxidation at pH 2.5 with [Ru(bpy)3]3+ as the oxidant. 2,6-dipyridylphenyl as a strong σ-electron donor ligand negatively shifted the oxidation potential of water.

リンク情報
DOI
https://doi.org/10.1002/slct.201600716
ID情報
  • DOI : 10.1002/slct.201600716
  • ISSN : 2365-6549
  • SCOPUS ID : 85012244557

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