Primary reactions in irradiated deuterio. cap alpha. -amino acids studied by pulse radiolysis and ESR spectroscopy. [800-KeV electrons]

Journal Article · Thu Oct 16 00:00:00 EDT 1980 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100458a030· OSTI ID:6765579

Samskog, P O ^[1]; Nilsson, G; Lund, A; Gillbro, T

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1. Studsvik Science Research Lab., Nykoeping, Sweden

Transient optical absorptions have been observed in a pulse radiolysis study of glycine-d/sub 3/, L-alanine-d/sub 3/, and (..cap alpha..-amino-d/sub 2/)isobutyric acid-d. By comparing the kinetics of the transient optical absorptions with the decay of the line intensities in the ESR spectra, we have been able to assign the optical transients to the primary oxidation and reduction products of the amino acids. The radical anions have their absorption maxima at 480, 415, and 365 nm, respectively, and the activation energies for deamination are 5.5, 10.4, and 11.7 kcal mol/sup -1/. The radical cation of glycine-d/sub 3/ absorbs at 365 nm. The radical cations of the other two amino acids absorb in uv, and all decarboxylate with an activation energy of about approx. 11 kcal mol/sup -1/.

• OSTI ID: 6765579
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Journal Issue: 21 Vol. 84:21; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ABSORPTION SPECTROSCOPY
ACTIVATION ENERGY
ALANINE-ALPHA
ALANINE-L
ALANINES
AMINO ACIDS
ANIONS
BEAMS
CARBOXYLIC ACIDS
CATIONS
CHARGED PARTICLES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DEAMINATION
DECARBOXYLATION
DECOMPOSITION
DEUTERATION
ELECTRON BEAMS
ELECTRON SPIN RESONANCE
ENERGY
GLYCINE
IONS
IRRADIATION
LEPTON BEAMS
MAGNETIC RESONANCE
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDATION
PARTICLE BEAMS
PULSED IRRADIATION
RADIATION CHEMISTRY
RADIATION EFFECTS
RADICALS
RADIOLYSIS
REDUCTION
RESONANCE
SPECTROSCOPY