Organic photochemical storage of solar energy. Progress report, February 1, 1980-January 31, 1981
The valence isomerization of organic compounds has been studied with emphasis on mechanisms involving photoionization of electron donor-acceptor pairs. Norbornadienes have been shown to undergo rearrangement as the result of quenching fluorescent sensitizers. A mechanism involving the formation of radical-ion pairs in polar solvent and triplet states of either sensitizer or quencher is supported by flash photolysis results and the observation of chemically induced dynamic nuclear polarization. Valence photoisomerization of charge-transfer complexes of quadricyclenes and hexamethyl(Dewar benzene) has been studied, including the finding of a novel wavelength dependence of quantum yield of photoionization. In a model study projections have been made, using a computerized analysis of kinetic parameters, of the dependence on temperature of quantum efficiencies for photoreactions involving electron or energy transfer. Preliminary results are reported concerning a new investigation of the photodecomposition of water using organic redox reagents. Electron donor-acceptor pairs (dicarbonyl compounds and amines or CT complexes of methyl viologen) have been photolyzed in aqueous solution with the evolution of hydrogen in the presence of a platinum catalyst.
- Research Organization:
- Boston Univ., MA (USA). Dept. of Chemistry
- DOE Contract Number:
- AS02-77ER04380
- OSTI ID:
- 6487159
- Report Number(s):
- DOE/ER/04380-T1; COO-4380-4; ON: DE81023131
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
25 ENERGY STORAGE
NORBORNADIENE
PHOTOCHEMICAL ENERGY STORAGE
RESEARCH PROGRAMS
QUADRICYCLENE
CARBONYLS
ISOMERIZATION
PHOTOIONIZATION
PHOTOLYSIS
SENSITIZERS
ALKENES
CHEMICAL REACTIONS
CYCLOALKENES
DECOMPOSITION
ENERGY STORAGE
HYDROCARBONS
IONIZATION
ORGANIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
REAGENTS
STORAGE
140505* - Solar Energy Conversion- Photochemical
Photobiological
& Thermochemical Conversion- (1980-)
250800 - Energy Storage- Chemical