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 - 2006

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Spin Trapping
static pressure
trapping
traps
Pressure
Oxides
Amines
Paramagnetic resonance
Rate constants
Chemical activation
Electron Spin Resonance Spectroscopy
nitrones
Equipment and Supplies
electron paramagnetic resonance
amines
activation
alpha-(4-pyridyl-1-oxide)-N-tert-butylnitrone
oxides

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Chemistry(all)

Cite this

High static pressure alters spin trapping rates in solution. Dependence on the structure of nitrone spin traps. / Sueishi, Yoshimi; Yoshioka, Daisuke; Yoshioka, Chiharu; Yamamoto, Shunzo; Kotake, Yashige.

In: Organic and Biomolecular Chemistry, Vol. 4, No. 5, 2006, p. 896-901.

Research output: Contribution to journalArticle

Sueishi, Yoshimi ; Yoshioka, Daisuke ; Yoshioka, Chiharu ; Yamamoto, Shunzo ; Kotake, Yashige. / High static pressure alters spin trapping rates in solution. Dependence on the structure of nitrone spin traps. In: Organic and Biomolecular Chemistry. 2006 ; Vol. 4, No. 5. pp. 896-901.
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