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Photoinduced Charge Separation and Charge Recombination to a Triplet State in a Carotene−Porphyrin−Fullerene Triad
Abstract
A molecular triad consisting of a diarylporphyrin (P) covalently linked to a carotenoid polyene (C) and a fullerene (C 60 ) has been prepared and studied using time-resolved spectroscopic methods. In 2-methyltetrahydrofuran solution, the triad undergoes photoinduced electron transfer to yield C−P •+ −C 60 •-, which evolves into C •+ −P−C 60 •- with an overall quantum yield of 0.14. This state decays by charge recombination to yield the carotenoid triplet state with a time constant of 170 ns. Even in a glass at 77 K, C •+ −P−C 60 •- is formed with a quantum yield of ∼0.10 and again decays mainly by charge recombination to give 3 C−P−C 60 . The fullerene triplet, formed through normal intersystem crossing, is also observed at 77 K. The generation in the triad of a long-lived charge separated state by photoinduced electron transfer, the low-temperature electron transfer behavior, and the formation of a triplet state by charge recombination are phenomena previously observed mostly in photosynthetic reaction centers.
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Metadata
- Authors
- Liddell, P. A., Kuciauskas, D., Sumida, J. P., Nash, B., Nguyen, D., Moore, A. L., Moore, T. A., & Gust, D.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 1997-02-01
- Volume
- 119
- Issue
- 6
- Pages
- 1400-1405
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2042968901
- Cited by
- 373
- References
- 0
- FWCI
- 26.59
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Photoinduced Charge Separation and Charge Recombination to a Triplet State in a Carotene−Porphyrin−Fullerene Triad. https://app.cochat.ai/papers/10.1021/ja9631054
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- Liddell, P. A., Kuciauskas, D., Sumida, J. P., Nash, B., Nguyen, D., Moore, A. L., Moore, T. A., & Gust, D. (1997). Photoinduced Charge Separation and Charge Recombination to a Triplet State in a Carotene−Porphyrin−Fullerene Triad. Journal of the American Chemical Society. https://doi.org/10.1021/ja9631054
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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