Magnetic resonance studies of photosynthetic reaction centers and porphyrins: Progress report, June 1, 1987-January 10, 1988
The primary event in photosynthesis is a charge separation reaction involving chlorophylls as electron donor molecules. Work performed has been concerned with photoinduced electron transfer reactions in systems that exhibit some of the photochemical characteristics of chlorophylls. Information on factors that affect charge separation is obtained by monitoring paramagnetic species generated in the reaction using electron spin resonance (ESR) techniques. Data on structure and dynamics of doublet and triplet state molecules were obtained with magnetic resonance methods. Of special interest is the application of Fourier Transform ESR methodology in the study of the electron transfer reaction from triplet zinc tetraphenylporphyrin (ZnTPP) to duroquinone. FT ESR provides data on dynamics of free radical formation and decay with nanosecond time resolution. The technique can give detailed information on reactions that proceed at close to diffusion controlled rates. Spin polarization effects give an insight into the mechanism of the charge separation reaction.
- Research Organization:
- Massachusetts Univ., Boston (USA). Dept. of Chemistry
- DOE Contract Number:
- FG02-84ER13242
- OSTI ID:
- 5493034
- Report Number(s):
- DOE/ER/13242-4; ON: DE88004955
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
Similar Records
Magnetic resonance studies of photo-induced electron transfer reactions. Final report, June 1, 1990--May 31, 1993
Magnetic resonance studies of photo-induced electron transfer reactions
Related Subjects
PHOTOSYNTHETIC REACTION CENTERS
STRUCTURAL CHEMICAL ANALYSIS
PORPHYRINS
BENZOQUINONES
CHLOROPHYLL
DIMERIZATION
DYE LASERS
ELECTRON TRANSFER
ELECTRONIC STRUCTURE
FERRICYANIDES
FOURIER TRANSFORMATION
MAGNETIC RESONANCE
OXIDATION
PARAMAGNETISM
PHOTOCHEMICAL REACTIONS
PHYSICAL PROPERTIES
PROGRESS REPORT
RADICALS
RELAXATION
SPIN
ANGULAR MOMENTUM
AROMATICS
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
COMPLEXES
DOCUMENT TYPES
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
INTEGRAL TRANSFORMATIONS
IRON COMPLEXES
LASERS
LIQUID LASERS
MAGNETISM
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PARTICLE PROPERTIES
PHYTOCHROMES
PIGMENTS
POLYMERIZATION
PROTEINS
QUINONES
RESONANCE
TRANSFORMATIONS
TRANSITION ELEMENT COMPLEXES
140505* - Solar Energy Conversion- Photochemical
Photobiological
& Thermochemical Conversion- (1980-)