Molecular oxygen spin-lattice relaxation in solutions measured by proton magnetic relaxation dispersion

Ching Ling Teng, Heedoek Hong, Suzanne Kiihne, Robert G. Bryant

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

Proton spin-lattice relaxation rate constants have been measured as a function of magnetic field strength for water, water-glycerol solution, cyclohexane, methanol, benzene, acetone, aceto-nitrile, and dimethyl sulfoxide. The magnetic relaxation dispersion is well approximated by a Lorentzian shape. The origin of the relaxation dispersion is identified with the paramagnetic contribution from molecular oxygen. In the small molecule cases studied here, the effective correlation time for the electron-nuclear coupling may include contributions from both translational diffusion and the electron T1. The electron T1 for molecular oxygen dissolved in several solvents was found to be approximately 7.5 ps and nearly independent of solvent or viscosity.

Original languageEnglish (US)
Pages (from-to)31-34
Number of pages4
JournalJournal of Magnetic Resonance
Volume148
Issue number1
DOIs
StatePublished - Jan 1 2001
Externally publishedYes

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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