Investigation of fuel production using metalloporphyrin-based complexes as catalysts and electron-transfer intermediates: Annual report, April 1987--December 1988
Metalloporphyrins have appropriate properties for photosensitizing and catalysts solar energy storage reactions. Fundamental spectroscopic studies of metalloporphyrins and related enzymes that carry out C/sub 1/ chemistry can identify the factors controlling reactivity of the metal complexes. Research has concentrated on mimicking biological methanogenesis through investigation of the enzyme methylreductase, which carries out the final step in the reduction of Co/sub 2/ to methane. Transient and difference Raman spectroscopies were used to investigate the structural features of methylreductase, its nickel-hydrocorphin Cofactor F/sub 430/, and hydrocorphin and porphrin analogs of the active nickel complex. in particular, axial ligation at the nickel site was evaluated under a variety of conditions with the goal of elucidating the mechanism of methane synthesis. Studies of the tin-and antimony-porphyrin photoredox cycles were also carried out as possible solar-driven sources of reductant for biomimetic methane generation. 1 ref., 1 fig.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6201024
- Report Number(s):
- SAND-89-0269; GRI-89/0040; ON: DE89011321
- Country of Publication:
- United States
- Language:
- English
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10 SYNTHETIC FUELS
550500 -- Metabolism
59 BASIC BIOLOGICAL SCIENCES
ALKANES
ANTIMONY
BACTERIA
BIOCHEMICAL REACTION KINETICS
BIOMIMETIC PROCESSES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBOXYLIC ACIDS
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
COMPLEXES
DOCUMENT TYPES
ELECTRON TRANSFER
ELEMENTS
ENERGY
ENERGY SOURCES
ENZYMES
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
KINETICS
METALS
METHANE
METHANOGENIC BACTERIA
MICROORGANISMS
NICKEL COMPLEXES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXIDOREDUCTASES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PORPHYRINS
PRODUCTION
PROGRESS REPORT
REACTION INTERMEDIATES
REACTION KINETICS
RENEWABLE ENERGY SOURCES
SOLAR ENERGY
TIN
TRANSITION ELEMENT COMPLEXES