EPR study of a vinyl-type radical in X-irradiated. beta. -carotene

Journal Article · Thu May 09 00:00:00 EDT 1985 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100256a042· OSTI ID:5102773

Joseph, J; Samskog, P O; Lee, S H; Kispert, L D

A vinyl-type radical with proton EPR couplings of 68 and 72 G has been observed at -40/sup 0/C as a secondary radical formed when a sample of trans-..beta..-carotene powder is X-ray irradiated at 77 K in the dark and warmed. An INDO/CI calculation suggests that it is due to the loss of a proton from the 15 or 15' position. 22 references, 3 tables.

• Research Organization: Univ. of Alabama, Tuscaloosa
• OSTI ID: 5102773
• Journal Information: J. Phys. Chem.; (United States), Vol. 89:10
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
14 SOLAR ENERGY
CAROTENOIDS
RADIOLYSIS
VINYL RADICALS
STRUCTURAL CHEMICAL ANALYSIS
CONFIGURATION INTERACTION
COUPLING
COUPLING CONSTANTS
ELECTRON SPIN RESONANCE
EXPERIMENTAL DATA
HYDROGEN
HYDROGEN TRANSFER
LOW TEMPERATURE
MOLECULAR MODELS
X RADIATION
ALKYL RADICALS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DATA
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ELEMENTS
HYDROCARBONS
INFORMATION
IONIZING RADIATIONS
MAGNETIC RESONANCE
MATHEMATICAL MODELS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PIGMENTS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADICALS
RESONANCE
TERPENES
400600* - Radiation Chemistry
400301 - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)
140505 - Solar Energy Conversion- Photochemical
Photobiological
& Thermochemical Conversion- (1980-)