Disproportionation of a 2,2-diphenyl-1-picrylhydrazyl radical as a model of reactive oxygen species catalysed by Lewis and/or Brønsted acids

Ikuo Nakanishi; Tomonori Kawashima; Kei Ohkubo; Tsukasa Waki; Yoshihiro Uto; Tadashi Kamada; Toshihiko Ozawa; Ken Ichiro Matsumoto; Shunichi Fukuzumi

doi:10.1039/c3cc47819j

Disproportionation of a 2,2-diphenyl-1-picrylhydrazyl radical as a model of reactive oxygen species catalysed by Lewis and/or Brønsted acids

Ikuo Nakanishi, Tomonori Kawashima, Kei Ohkubo, Tsukasa Waki, Yoshihiro Uto, Tadashi Kamada, Toshihiko Ozawa, Ken Ichiro Matsumoto, Shunichi Fukuzumi

Department of Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Electron-transfer disproportionation of a 2,2-diphenyl-1-picrylhydrazyl radical (DPPH) occurred in the presence of Sc³⁺ acting as a strong Lewis acid in deaerated acetonitrile. In contrast, in the case of weaker Lewis acids than Sc³⁺, such as Mg²⁺ and Li⁺, external protons from acetic acid were required for the disproportionation of DPPH to occur.

Original language	English
Pages (from-to)	814-816
Number of pages	3
Journal	Chemical Communications
Volume	50
Issue number	7
DOIs	https://doi.org/10.1039/c3cc47819j
State	Published - 17 Dec 2014

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title = "Disproportionation of a 2,2-diphenyl-1-picrylhydrazyl radical as a model of reactive oxygen species catalysed by Lewis and/or Br{\o}nsted acids",

abstract = "Electron-transfer disproportionation of a 2,2-diphenyl-1-picrylhydrazyl radical (DPPH) occurred in the presence of Sc3+ acting as a strong Lewis acid in deaerated acetonitrile. In contrast, in the case of weaker Lewis acids than Sc3+, such as Mg2+ and Li+, external protons from acetic acid were required for the disproportionation of DPPH to occur.",

author = "Ikuo Nakanishi and Tomonori Kawashima and Kei Ohkubo and Tsukasa Waki and Yoshihiro Uto and Tadashi Kamada and Toshihiko Ozawa and Matsumoto, {Ken Ichiro} and Shunichi Fukuzumi",

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doi = "10.1039/c3cc47819j",

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journal = "Chemical Communications",

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T1 - Disproportionation of a 2,2-diphenyl-1-picrylhydrazyl radical as a model of reactive oxygen species catalysed by Lewis and/or Brønsted acids

AU - Nakanishi, Ikuo

AU - Kawashima, Tomonori

AU - Ohkubo, Kei

AU - Waki, Tsukasa

AU - Uto, Yoshihiro

AU - Kamada, Tadashi

AU - Ozawa, Toshihiko

AU - Matsumoto, Ken Ichiro

AU - Fukuzumi, Shunichi

PY - 2014/12/17

Y1 - 2014/12/17

N2 - Electron-transfer disproportionation of a 2,2-diphenyl-1-picrylhydrazyl radical (DPPH) occurred in the presence of Sc3+ acting as a strong Lewis acid in deaerated acetonitrile. In contrast, in the case of weaker Lewis acids than Sc3+, such as Mg2+ and Li+, external protons from acetic acid were required for the disproportionation of DPPH to occur.

AB - Electron-transfer disproportionation of a 2,2-diphenyl-1-picrylhydrazyl radical (DPPH) occurred in the presence of Sc3+ acting as a strong Lewis acid in deaerated acetonitrile. In contrast, in the case of weaker Lewis acids than Sc3+, such as Mg2+ and Li+, external protons from acetic acid were required for the disproportionation of DPPH to occur.

UR - http://www.scopus.com/inward/record.url?scp=84890838335&partnerID=8YFLogxK

U2 - 10.1039/c3cc47819j

DO - 10.1039/c3cc47819j

M3 - Article

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AN - SCOPUS:84890838335

SN - 1359-7345

VL - 50

SP - 814

EP - 816

JO - Chemical Communications

JF - Chemical Communications

IS - 7

ER -

Disproportionation of a 2,2-diphenyl-1-picrylhydrazyl radical as a model of reactive oxygen species catalysed by Lewis and/or Brønsted acids

Abstract

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