Photosensitized electron transport across lipid vesicle walls
The prospect of using lipid bilayer vesicles in artificial photosynthetic devices which decompose water photochemically as a means of converting and storing solar energy is addressed. The vesicles serve to mediate charge separation during photosensitized electron transfer reactions. The vesicle systems of particular interest have amphiphilic dyes dissolved in the walls of the vesicles and aqueous solutions of electron-donating and accepting molecules separated by the walls. Photosensitized electron transfer across the bilayer from the donor to the acceptor results in spatially separated redox products, thereby preventing energy-wasting back-reactions between these intermediates in the decomposition of water. The overall strategy and some physicochemical properties of vesicles are outlined. Some electronic spectral and photochemical properties of synthetic amphiphilic dyes are characterized, with emphasis on micellar aqueous media. The evolution of a model system for studying photosensitized electron transport across vesicle walls is described.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6566288
- Report Number(s):
- LBL-15171; ON: DE83007046
- Country of Publication:
- United States
- Language:
- English
Similar Records
Photosensitized electron transport across lipid vesicle walls: enhancement of quantum yield by ionophores and transmembrane potentials
Control of photosensitized electron transfer reactions in organized interfacial systems: vesicles, water-in-oil microemulsions, and colloidal silicon dioxide particles
Related Subjects
080106 -- Hydrogen-- Production-- Biosynthesis & Photochemical Processes
14 SOLAR ENERGY
140505* -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
BIOMIMETIC PROCESSES
CARBOXYLIC ACIDS
CELL CONSTITUENTS
CELL WALL
CHEMICAL REACTIONS
ELECTRON TRANSFER
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDROGEN PRODUCTION
LEPTONS
LIPIDS
LIPOSOMES
MEMBRANE TRANSPORT
MEMBRANES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANOIDS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PHOTOSYNTHETIC MEMBRANES
PORPHYRINS
RUTHENIUM COMPOUNDS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS