High static pressure alters spin trapping rates in solution. Dependence on the structure of nitrone spin traps

Yoshimi Sueishi, Daisuke Yoshioka, Chiharu Yoshioka, Shunzo Yamamoto, Yashige Kotake

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Using a competitive spin trapping method, relative spin trapping rates were quantified for various short-lived radicals (methyl, ethyl, and phenyl radicals). High static pressure was applied to the competitive spin-trapping system by employing high-pressure electron spin resonance (ESR) equipment. Under high pressure (490 bar), spin trapping rate constants for alkyl and phenyl radicals increased by 10 to 40%, and the increase was dependent on the structure of nitrone spin traps. A maximum increase was obtained when tert-butyl(4-pyridinylmethylene)amine N-oxide (4-POBN) was used as a spin trap. Activation volumes (ΔΔV) for the two spin trapping reactions were calculated to be -17-(-9) cm3 mol -1 for the 4-POBN system.

Original languageEnglish
Pages (from-to)896-901
Number of pages6
JournalOrganic and Biomolecular Chemistry
Volume4
Issue number5
DOIs
Publication statusPublished - Mar 2 2006

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry

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