Photoinduced dipoles and charge pairs in condensed phase. Progress report, November 14, 1993--November 15, 1994
Efforts during the past year centered on expanding the understanding of the photocurrent transients produced by photoinduced dipoles in solution. In addition to exploring intramolecular charge transfer in a molecule which exhibits a giant dipole, the authors began an intensive look at intermolecular electron transfer between photoexcited electron donors and acceptors. The three projects which are farthest along are described in abstract form in the paragraphs which follow. The first makes use of the generous gift from Dr. Michael Wasielewski (Argonne National Laboratory) of a carefully constructed molecular triad which exemplifies artificial photosynthesis. Measurements reveal that the triad possesses a substantial ground state dipole moment as well as the long-lived charge separation which was expected for the excited state. The second and third abstracts describe the quantification of fractional charge transfer in excited state complexes (exciplexes). All exciplexes are not the same and the authors found that the fractional electron transfer increases with reaction exoergicity. The first and second abstracts describe work which is nearly ready to be submitted. The third outlines the mechanistically fascinating story of how one donor replaces another in an excited state complex. Their tentative conclusion is that the mechanism depends on reaction exoergicity.
- Research Organization:
- Dartmouth Coll., Hanover, NH (United States). Dept. of Chemistry
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-86ER13592
- OSTI ID:
- 10117007
- Report Number(s):
- DOE/ER/13592-9; ON: DE95007071; BR: KC0301010; TRN: AHC29509%%26
- Resource Relation:
- Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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