ZERO-FIELD ELECTRON MAGNETIC RESONANCE IN SOME INORGANIC AND ORGANIC RADICALS
Journal Article
·
· Journal of Chemical Physics (U.S.)
Zero-field electron magnetic resonance (EMR) spectra were observed for several dilute paramagnetic systems. Among these are peroxylamine disulfonate ions in aqueous solutions, Cr/sup 3+/ in single crystals of MgO, free radicals in x-irradiated powders of malonic acid, potassium hydrogen malonate, dipotassium malonate, succinic acid, and glutaconic acid. Zero-fieid spectra were observed by means of a marginal oscillator-detector. The zero-field splittings in the systems studied were due exclusively to the hyperfine couplings between electronic and nuclear spins. Results obtained were in good agreement with high- field EMR measurements on the systems. In several cases the hyperfine couplings were obtained with greater precision than at high field. In addition, the radical /sup -/OOC --CH--COO/sup -/ was identified, for the first time, in irradiated dipotassium malonate by means of its zero-field spectrum. No zerofield lines could be detected in electron-irradiated polyethylene. Advantages and disadvantages of the zero-field technique are discussed. (auth)
- Research Organization:
- Ford Motor Co., Dearborn, Mich.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-033899
- OSTI ID:
- 4670066
- Journal Information:
- Journal of Chemical Physics (U.S.), Journal Name: Journal of Chemical Physics (U.S.) Vol. Vol: 38; ISSN JCPSA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
AMINES
ANIONS
CATIONS
CHEMISTRY
CHROMIUM COMPOUNDS
COMPOUNDS
ELECTRIC FIELDS
ELECTRON BEAMS
ELECTRONS
FREE RADICALS
INSTRUMENTS
IRRADIATION
MAGNESIUM OXIDES
MAGNETIC FIELDS
MAGNETIC RESONANCE
MAGNETISM
MALONIC ACID
MEASURED VALUES
MIXING
MONOCRYSTALS
NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
OSCILLATIONS
OXIDES
PARAMAGNETISM
PEROXIDES
POLYETHYLENES
POTASSIUM COMPOUNDS
SOLUTIONS
SPECTRA
SPIN
SUCCINIC ACID
SULFONIC ACIDS
WATER
X RADIATION
ANIONS
CATIONS
CHEMISTRY
CHROMIUM COMPOUNDS
COMPOUNDS
ELECTRIC FIELDS
ELECTRON BEAMS
ELECTRONS
FREE RADICALS
INSTRUMENTS
IRRADIATION
MAGNESIUM OXIDES
MAGNETIC FIELDS
MAGNETIC RESONANCE
MAGNETISM
MALONIC ACID
MEASURED VALUES
MIXING
MONOCRYSTALS
NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
OSCILLATIONS
OXIDES
PARAMAGNETISM
PEROXIDES
POLYETHYLENES
POTASSIUM COMPOUNDS
SOLUTIONS
SPECTRA
SPIN
SUCCINIC ACID
SULFONIC ACIDS
WATER
X RADIATION