Electron--electron double resonance investigations of irradiated organic crystals: the influence of deuterium substitution

Conference · Mon Jan 01 00:00:00 EST 1973

OSTI ID:4336192

Kispert, L D; Chang, K; Wang, P S

Electron-electron double resonance (ELDOR) investigations of irradiated organic crystals have shown promising uses of deuterium substitution in the ELD0R identification of magnetically different radicals associated with a poorly resolved ESR spectrum Replacement of the water of crystallization in potassium acetate crystals with deuterium oxide has removed the proton spin-fiip lines in the ELD0R spectrum of the methyl radical and has permitted fewer ELDOR combination lines from magnetically different radicals to be observed at 77 deg K. A study of the hydrogendeuterium exchange reactions in irradiated glycine-d/ sub 3/ and l-alanine crystals has shown the absence of ELD0R lines at the deuteron hyperfine frequency a/sub D/ and the absence of hydrogen-deuterium combination lines, but the presence of an intense line at the proton hyperfine splitting frequency. In addition a significant decrease in the intermolecular cross exchange near room temperature permitted a separation of the proton ELDOR spectra for each hydrogen-deuterium Exchange reaction making it possible to identify the different simultaneously occurring reactions. (auth)

• Research Organization: Alabama Univ., University (USA). Dept. of Chemistry
• DOE Contract Number: AT(40-1)-4062
• NSA Number: NSA-29-029104
• OSTI ID: 4336192
• Report Number(s): ORO-4062-13; CONF-731067-1
• Resource Relation: Conference: Southeastern magnetic resonance conference, Tuscaloosa, Alabama, USA, Oct 1973; Other Information: Orig. Receipt Date: 30-JUN-74
• Country of Publication: United States
• Language: English

Related Subjects

N40300* -Chemistry-Radiation Chemistry
N40230 - Chemistry-Inorganic
Organic
& Physical Chemistry-Isotope Exchange & Isotope Separation
*ALANINE-L- CHEMICAL RADIATION EFFECTS
*DEUTERIUM- ISOTOPIC EXCHANGE
*GLYCINE- CHEMICAL RADIATION EFFECTS
ACETATES
CRYSTALS
ELDOR
ISOTOPE EFFECTS
LOW TEMPERATURE
POTASSIUM COMPOUNDS
RADICALS
X RADIATION