Photoinduced Electron Transfer between Carotenoids and Solvent Molecules Full article
| Journal |
The Journal of Physical Chemistry B
ISSN: 1520-6106 , E-ISSN: 1520-5207 |
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| Output data | Year: 1997, Volume: 101, Number: 39, Pages: 7858–7862 Pages count : 5 DOI: 10.1021/jp9708761 | ||||||
| Tags | Electron energy levels; Electron transitions; Paramagnetic resonance; Photolysis; Reaction kinetics; Solvents | ||||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | United States Department of Energy | DE-FG05-86ER13465 |
Abstract:
EPR evidence for photoinduced electron transfer from β-carotene and canthaxanthin to solvent molecules under 308−578 nm photolysis of frozen carotenoid solutions in CCl4, CHCl3, CH2Cl2, and CS2 has been obtained. The paramagnetic species are stable at 77 K and are attributed to carotenoid radical cations (Car•+) and solvent derived radicals. For a CS2 solution, solvent radicals are identified as CS2•- radical anions, and for chlorinated solvents, they can be assigned to either a predissociation species (R···Cl)•- or radical products R•. The proposed reaction mechanism includes energy and electron transfer from the S1 and S2 excited singlet states of carotenoid molecules to the solvent to form an intermediate donor−acceptor complex 1[Car···Sol]* which decays yielding solvent-separated radical-ion pairs (Car•+···Sol···Sol•-).
Cite:
Konovalova T.A.
, Kispert L.D.
, Konovalov V.V.
Photoinduced Electron Transfer between Carotenoids and Solvent Molecules
The Journal of Physical Chemistry B. 1997. V.101. N39. P.7858–7862. DOI: 10.1021/jp9708761 WOS Scopus РИНЦ ANCAN OpenAlex
Photoinduced Electron Transfer between Carotenoids and Solvent Molecules
The Journal of Physical Chemistry B. 1997. V.101. N39. P.7858–7862. DOI: 10.1021/jp9708761 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Mar 10, 1997 |
| Accepted: | Jul 8, 1997 |
| Published print: | Sep 1, 1997 |
| Published online: | Sep 25, 1997 |
Identifiers:
| Web of science: | WOS:A1997XX85300027 |
| Scopus: | 2-s2.0-0031233220 |
| Elibrary: | 47574807 |
| Chemical Abstracts: | 1997:575569 |
| Chemical Abstracts (print): | 127:245604 |
| OpenAlex: | W2089498046 |