Catalysis of the electroreduction of O2 to H2O by vanadium-salen complexes in acidified dichloromethane

Eishun Tsuchida*, Kenichi Oyaizu, Eniya Listiani Dewi, Takahiro Imai, Fred C. Anson

*この研究の対応する著者

研究成果: Article査読

55 被引用数 (Scopus)

抄録

Addition of stoichiometric quantities of trifluoromethanesulfonic (triflic) acid to solutions of VIVO(salen) (H2-salen = N,N′-ethylenebis(salicylideneamine)) in dichloromethane produces the μ-oxo dinuclear vanadium(IV) complex [(salen)VIVOVIV(salen)]2+ ([VIVOVIV]2+). Addition of significant excesses of triflic acid converts the dimer into [VIV(salen)]2+. In dichloromethane solutions containing 0.1 M tetrabutylammonium tetrafluoroborate, the [VIVOVIV]2+ complex undergoes disproportionation and dissociation reactions to produce a solution containing an equimolar mixture of VIVO(salen), [VIII(salen)]+, and [VIVOVV]3+. The oxophilic [VIII(salen)]+ complex reacts with O2 to accomplish a four-electron reduction of O2: 2[VIII(salen)]+ + O2 → 2[VVO(salen)]+. These reactions can be exploited to carry out catalytic electroreductions of O2 to H2O in acidified dichloromethane solutions of VIVO(salen) at unusually positive potentials.

本文言語English
ページ(範囲)3704-3708
ページ数5
ジャーナルInorganic Chemistry
38
16
出版ステータスPublished - 1999 12月 1

ASJC Scopus subject areas

  • 物理化学および理論化学
  • 無機化学

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