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Photoinduced Charge Transfer Studies in Bolaamphiphile-Gramicidin-Porphyrin Membranes

Published online by Cambridge University Press:  15 February 2011

David H. Thompson  and
J.-M. Kim
David H. Thompson
Affiliation:
Biomolecular Materials Research Group, Department of Chemical and Biological Sciences, Oregon Graduate Institute of Science and Technology, 19600 NW von Neumann Drive, Beaverton, OR 97006-1999
J.-M. Kim
Affiliation:
Biomolecular Materials Research Group, Department of Chemical and Biological Sciences, Oregon Graduate Institute of Science and Technology, 19600 NW von Neumann Drive, Beaverton, OR 97006-1999
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Abstract

Synthetic ether-linked bolaform amphiphile vesicles and a novel gramicidin-porphyrin “diad” have been prepared. Photoinduced electron transfer properties of the diad were compared in bilayer (dihexadecylphosphate, DHP) and monolayer (2,2′-0-didecyl-1,1′-0-eicosamethylene-racdiglycero- 3,3′-diphosphoric acid, PS20) membrane vesicles with dithiothreitol sacrificial donor and methyl viologen electron acceptor present on both vesicle membrane surfaces. Although the rates of methyl viologen photoreduction varied depending on the mode of diad orientation within DHP bilayer membranes, photoreduction rates were not orientation-dependent in bolaform membrane vesicles containing the gramicidinporphyrin diad. The relevance of these results on vectorial electron transfer processes in closed membrane systems is briefly discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 277: Symposium V – Macromolecular Host-Guest Complexes: Optical, Optoelectronic, and Photorefractive Properties and Applications , 1992 , 93
Copyright
Copyright © Materials Research Society 1992

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References

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