Transient phenomena in the pulse radiolysis of retinyl polyenes. 3. Radical cations
Results are presented concerning transient absorption phenomena observed upon pulse radiolysis of several retinyl polyenes at submillimolar concentrations in acetone, n-hexane, and 1,2-dichloroethane under conditions favorable for radical cation formation. Oxygen insensitive, the polyene radical cations are characterized by intense absorption maximum (575-635 nm) with locations that show little or no dependence on functional groups. In acetone, they undergo decay predominantly by first-order kinetics with lifetimes 4 - 11 s. The biomolecular rate constants for radical cation quenching by water, triethylamine, and bromide ion in acetone are in the ranges (0.8 - 2) x 10V, (0.3 - 2) x 10Y, and (3 - 5) x 10 M s , respectively. 24 references, 10 figures, 2 tables.
- Research Organization:
- Univ. of Notre Dame, IN
- OSTI ID:
- 6344164
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 89:23; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400600* -- Radiation Chemistry
ABSORPTION SPECTRA
BEAMS
CARBOXYLIC ACID ESTERS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
DATA
DECOMPOSITION
ELECTRON BEAMS
ESTERS
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
KINETICS
LEPTON BEAMS
NUMERICAL DATA
ORGANIC COMPOUNDS
PARTICLE BEAMS
POLYENES
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIOLYSIS
REACTION INTERMEDIATES
REACTION KINETICS
RETINOIC ACID
SPECTRA
TRANSIENTS