Artificial photosynthesis using chlorophyll based carotenoid quinone triads: Technical progress report, (16 June 1985 to 28 February 1986)
The purpose of this project is to design, synthesize, and study tripartite chlorophyll-carotenoid-quinone molecules which mimic the early, energy conserving steps of natural photosynthesis. The synthetic molecules should mimic the photodriven multistep electron transfer reactions of photosynthesis which generate high-energy, long-lived charge separated states. They should also mimic carotenoid antenna function, which involves transfer of singlet energy from the carotenoid to the chlorophyll derivative, and photoprotection from singlet oxygen damage, which involves transfer of triplet energy from the chlorophyll derivative to the carotenoid. This report describes the synthesis and study of chlorophyll-based carotenopyropheophorbide-quinone triad molecules which mimic all of the natural processes mentioned above. Irradiation of one of these molecules in methylene chloride solution initiates a two-step electron transfer leading to the formation of an energetic charge-separated state with a lifetime of 120 ns and a quantum yield of approx.4%. 12 refs., 17 figs.
- Research Organization:
- Arizona State Univ., Tempe (USA). Dept. of Chemistry
- DOE Contract Number:
- FG02-84CH10198
- OSTI ID:
- 5693584
- Report Number(s):
- DOE/CH/10198-T3; ON: DE88003338
- Country of Publication:
- United States
- Language:
- English
Similar Records
Charge separation and energy transfer in carotenopyropheophorbide-quinone triads
Artificial photosynthesis using chlorophyll based carotenoid-quinone triads: Final technical progress report
Related Subjects
140505* -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
ABSORPTION SPECTROSCOPY
AROMATICS
BIOMIMETIC PROCESSES
CARBOXYLIC ACIDS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHLOROPHYLL
DOCUMENT TYPES
EMISSION SPECTROSCOPY
FLUORESCENCE SPECTROSCOPY
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
MAGNETIC RESONANCE
NUCLEAR MAGNETIC RESONANCE
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PHOTOSYNTHETIC REACTION CENTERS
PHYTOCHROMES
PIGMENTS
PORPHYRINS
PROGRESS REPORT
PROTEINS
QUINONES
RESONANCE
SPECTROSCOPY
SYNTHESIS