| Autor: |
Schild, V., Loyen, D. van, Durr, H., Bouas-Laurent, H., Turro, C., Worner, M., Pokhrel, M. Raj, Bossmann, S. H. |
| Zdroj: |
The Journal of Physical Chemistry - Part A; October 2002, Vol. 106 Issue: 40 p9149-9158, 10p |
| Abstrakt: |
The synthesis and photophysical properties of a ruthenium dyad (4) and triad (5) are reported. Both biomimetic systems are physical models for the photosynthetic reaction center. They consist of a ruthenium(II)-polypyridyl sensitizer featuring chemically attached 3,3-dimethyl-4,4-viologen and 4,4-viologen electron acceptors. The binding of the chemically attached electron acceptors by the three structurally different crown ethers, DB30C10, BBO5O5, and AAO5O5, offers a remarkable tool for the enhancement of the lifetimes of the charge separated states (τCS), up to a factor of 2 × 104. The drastic increase in the lifetimes observed can be explained by a decrease in the reorganization energy λ due to the presence of the crown ether units bound to the viologen acceptor. |
| Databáze: |
Supplemental Index |
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