Applications of photoinduced electron transfer and hydrogen abstraction reactions to chemical and electrochemical conversion processes. Progress report, September 1, 1982-August 1, 1985
The studies carried out have focused on photoinduced electron transfer and hydrogen atom abstraction processes. The main thrust over the past three years has been on a study of light induced electron transfer reactions and in particular on fates of the energy rich radical ions formed in electron transfer quenching of excited states. In particular we have studied these reactions under conditions - light absorbing substrates, quenchers, media - where net chemical conversion is favored over the usual back electron transfer to return to starting materials. The first part of the progress report focuses on our efforts to control reactivity by the use of specific substrates or quenchers which favor net chemical conversion. The second part describes our studies using reaction media - in this case amylose which preferentially complexes hydrophobic molecules in aqueous solution - to alter the rates of primary and secondary photophysical events associated with light induced electron transfer and other photoreactions. Our most extensive investigations of electron transfer reactions have involved the photoreduction of indigo dyes by electron donors. We have found that three representative indigo dyes, thioindigo, N,N'-diacetylindigo and oxalylindigo, all undergo photobleaching reactions with a variety of potential reductance ranging from alcohols to amines, such as triethylamine and N-benzyl-1, 4-dihydronicotinamide. 25 refs.
- Research Organization:
- Rochester Univ., NY (USA). Dept. of Chemistry
- DOE Contract Number:
- AC02-84ER13151
- OSTI ID:
- 5159116
- Report Number(s):
- DOE/ER/13151-2; ON: DE86000855
- Country of Publication:
- United States
- Language:
- English
Similar Records
Applications of photoinduced electron transfer and hydrogen abstraction reactions to chemical and electrochemical conversion processes. Part I. Progress report, March 1, 1981-July 1, 1983
Applications of photoinduced electron transfer and hydrogen abstraction reactions to chemical and electrochemical conversion processes. Progress report, March 1, 1981-September 1, 1982
Related Subjects
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
400500* -- Photochemistry
ALCOHOLS
AMINES
AQUEOUS SOLUTIONS
AROMATICS
AZAARENES
AZOLES
CARBOHYDRATES
CHEMICAL REACTIONS
COMPLEXES
DISPERSIONS
DYES
ELECTROCHEMICAL CELLS
ELECTRON TRANSFER
ENERGY LEVELS
EQUIPMENT
EXCITED STATES
FLUORESCENCE
HETEROCYCLIC COMPOUNDS
HYDROXY COMPOUNDS
INDIGO
INDOLES
LUMINESCENCE
MIXTURES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOELECTROCHEMICAL CELLS
POLYSACCHARIDES
PYRROLES
QUENCHING
RADICALS
REAGENTS
REDOX REACTIONS
REDUCTION
RESEARCH PROGRAMS
RUTHENIUM COMPLEXES
SACCHARIDES
SOLAR EQUIPMENT
SOLUTIONS
STARCH
TRANSITION ELEMENT COMPLEXES