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

نویسندگان

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

Electron-transfer disproportionation of a 2,2-diphenyl-1-picrylhydrazyl radical (DPPH˙) occurred in the presence of Sc(3+) acting as a strong Lewis acid in deaerated acetonitrile. In contrast, in the case of weaker Lewis acids than Sc(3+), such as Mg(2+) and Li(+), external protons from acetic acid were required for the disproportionation of DPPH˙ to occur.

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عنوان ژورنال:
  • Chemical communications

دوره 50 7  شماره 

صفحات  -

تاریخ انتشار 2014