Organic photochemical storage of solar energy. Progress report, July 1, 1977--Feburary 28, 1978

Technical Report · Wed Mar 01 04:00:00 EST 1978

DOI:https://doi.org/10.2172/5012614· OSTI ID:5012614

Jones, G II

The prospects for driving endoergic reactions of simple, relatively abundant organic chemicals by photochemical means have been examined. Strategies for utilization of light of varying wavelength involve sensitization mechanisms which depend on the redox properties of energy storing substrates and photosensitizers. Of principal interest is valence isomerization which can be induced by electron donor-acceptor interaction between substrate and sensitizer in an excited complex or exciplex. Photophysical studies show that potentially isomerizable substrates efficiently intercept redox photosensitizers. The quenching of emission of electron acceptor sensitizers by non conjugated hydrocarbon dienes is indeed a function of the reduction potential of the acceptors (a series of aromatics with varying absorption characteristics) and the oxidation potentials of the substrates. Electron deficient dienes have been shown alternatively to be efficient quenchers of excited donor sensitizers. That exciplexes are formed between isomerizable substrates and donor or acceptor sensitizers has been confirmed by emission spectroscopy. The rearrangement of hexamethyldewarbenzene, a model exciplex isomerization has been examined in some detail.

• Research Organization: Boston Univ., Mass. (USA). Dept. of Chemistry
• DOE Contract Number: EG-77-S-02-4380
• OSTI ID: 5012614
• Report Number(s): COO-4380-1
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
142000* -- Solar Energy-- Heat Storage-- (1980-)
25 ENERGY STORAGE
250600 -- Energy Storage-- Thermal
AROMATICS
BENZENE
CHEMICAL REACTIONS
CHEMISTRY
DIENES
ENERGY
ENERGY SOURCES
ENERGY STORAGE
HEAT STORAGE
HYDROCARBONS
ISOMERIZATION
MATERIALS
ORGANIC COMPOUNDS
PHOTOCHEMISTRY
POLYENES
REAGENTS
REDOX REACTIONS
RENEWABLE ENERGY SOURCES
SENSITIZERS
SOLAR ENERGY
STORAGE
SUBSTRATES
THERMOCHEMICAL HEAT STORAGE