On the rate of triplet excitation transfer in the diffusive limit

Davidovich, Maria A.; Knox, Robert

doi:10.1016/0009-2614(79)87223-1

Cited by 9 publications

(4 citation statements)

References 13 publications

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“…The latter was defined in terms of normalized D emission spectrum and normalized A absorption spectrum. This form of an overlap integral was supported by experimental observations made by Ermolaev and questioned by others …”

Section: Modifications Of Dexter Theory For Short-range Intra-eet: O...supporting

confidence: 69%

“…This form of an overlap integral was supported by experimental observations made by Ermolaev 201 and questioned by others. 202 Even if there was no ambiguity as to the value of J ex , the difficulties associated with the actual calculation of Z and the lack of direct connection between K and spectroscopic data make eq 31 rather useless for calculating the exchange contribution to the EET rate. It was, however, realized that a dependence of the transfer rate on the relative orientation of D and A must exist, particularly at small R values.…”

Section: Modifications Of Dexter Theory For Short-rangementioning

confidence: 99%

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Photophysics and Mechanisms of Intramolecular Electronic Energy Transfer in Bichromophoric Molecular Systems: Solution and Supersonic Jet Studies

1996

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Section: Modifications Of Dexter Theory For Short-range Intra-eet: O...supporting

confidence: 69%

Section: Modifications Of Dexter Theory For Short-rangementioning

confidence: 99%

Photophysics and Mechanisms of Intramolecular Electronic Energy Transfer in Bichromophoric Molecular Systems: Solution and Supersonic Jet Studies

1996

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“…Here, U DA is the electronic coupling between donor and acceptor, and S D (E) and S A (E) are defined (Davidovich and Knox, 1979;Agranovich and Galanin, 1982;, manuscript in preparation) as…”

Section: Theorymentioning

confidence: 99%

Excitation Transfer in the Peridinin-Chlorophyll-Protein of Amphidinium carterae

Damjanović

Ritz

Schulten

2000

Biophysical Journal

125

179

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Peridinin-chlorophyll-protein (PCP) is a unique light-harvesting protein that uses carotenoids as its primary light-absorbers. This paper theoretically investigates excitation transfer between carotenoids and chlorophylls in PCP of the dinoflagellate Amphidinium carterae. Calculations based on a description of the electronic states of the participating chromophores and on the atomic level structure of PCP seek to identify the mechanism and pathways of singlet excitation flow. After light absorption the optically allowed states of peridinins share their electronic excitation in excitonic fashion, but are not coupled strongly to chlorophyll residues in PCP. Instead, a gateway to chlorophyll Q(y) excitations is furnished through a low-lying optically forbidden excited state, populated through internal conversion. Carbonyl group and non-hydrogen side groups of peridinin are instrumental in achieving the respective coupling to chlorophyll. Triplet excitation transfer to peridinins, mediated by electron exchange, is found to efficiently protect chlorophylls against photo-oxidation.

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“…It would be very convenient if indeed the associated vibrational overlap factors were the same as those appearing in the H dd term, because we could then argue that all electronic factors in the matrix elements drop out of the ratio F l → k / F k → l . But the vibrational overlaps in H corr are not necessarily the same as those appearing in H dd except under very special circumstances . Consider triplet states, for example, to which optical transitions are not allowed.…”

Section: Discussion and Applicationsmentioning

confidence: 99%

Detailed Balance in Förster−Dexter Excitation Transfer and Its Application to Photosynthesis

1998

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Under the conditions assumed both by Förster in his resonance-transfer theory and by Kennard and Stepanov in their theory of a universal relation between fluorescence and absorption, the rates of transfer between two chromophores k and l are related by F l → k /F k → l = exp[−(ΔG k − ΔG l )/k B T)], where the energies ΔG j are the free energies of excitation relating to the vibrational and other bath states interacting with the chromophore. They are dominated by, but not identical with, the 0−0 transition energies of the two chromophores. We show that ΔG k − ΔG l can be computed reliably with Förster's overlap integral approximation only when the Kennard−Stepanov relation is obeyed for both chromophores. We examine the extent to which approximations to Förster−Dexter transfer agree with this detailed balance result and the implications of the result for multichromophore systems.

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On the rate of triplet excitation transfer in the diffusive limit

Cited by 9 publications

References 13 publications

Photophysics and Mechanisms of Intramolecular Electronic Energy Transfer in Bichromophoric Molecular Systems: Solution and Supersonic Jet Studies

Photophysics and Mechanisms of Intramolecular Electronic Energy Transfer in Bichromophoric Molecular Systems: Solution and Supersonic Jet Studies

Excitation Transfer in the Peridinin-Chlorophyll-Protein of Amphidinium carterae

Detailed Balance in Förster−Dexter Excitation Transfer and Its Application to Photosynthesis

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