Molecular structures of porphyrin-quinone models for electron transfer
- Brookhaven National Lab., Upton, NY (United States)
- Free Univ. of Berlin (Germany)
Synthetic porphyrin-quinone complexes are commonly used to mimic electron transport in photosynthetic reaction centers and to probe the effects of energetics, distances, and relative orientations on rates of electron transfer between donor-acceptor couples. The structures of two such models have been determined by X-ray diffraction. The redox pairs consist of a zinc porphyrin covalently linked to benzoquinone in cis and trans configurations via a cyclohexanediyl bridge. The crystallographic studies were undertaken to provide a structural foundation for the extensive body of experimental and theoretical results that exists for these compounds in both the ground and photoinduced charge-separated states. The results validate conclusions reached from theoretical calculations, EPR and two-dimensional NMR results for these states. 15 refs., 6 figs., 2 tabs.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 381801
- Journal Information:
- Journal of Physical Chemistry, Vol. 100, Issue 33; Other Information: PBD: 15 Aug 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
Distance dependent rates of photoinduced charge separation and dark charge recombination in fixed distance porphyrin-quinone molecules
Structural effects on photoinduced electron transfer in carotenoid-porphyrin-quinone triads