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An exact solution in the theory of fluorescence resonance energy transfer with vibrational relaxation

Mondal, S and Mondal, S and Seki, K and Bagchi, B (2021) An exact solution in the theory of fluorescence resonance energy transfer with vibrational relaxation. In: Journal of Chemical Physics, 154 (13).

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Official URL: https://doi.org/10.1063/5.0045008


The elegant expression of Förster that predicts the well-known 1/R6 distance (R) dependence of the rate of energy transfer, although widely used, was derived using several approximations. Notable among them is the neglect of the vibrational relaxation in the reactant (donor) and product (acceptor) manifolds. Vibrational relaxation can play an important role when the energy transfer rate is faster than the vibrational relaxation rate. Under such conditions, donor to acceptor energy transfer can occur from the excited vibrational states. This phenomenon is not captured by the usual formulation based on the overlap of donor emission and acceptor absorption spectra. Here, we develop a Green's function-based generalized formalism and obtain an exact solution for the excited state population relaxation and the rate of energy transfer in the presence of vibrational relaxation. We find that the application of the well-known Förster's expression might lead to overestimation of R. © 2021 Author(s).

Item Type: Journal Article
Publication: Journal of Chemical Physics
Publisher: American Institute of Physics Inc.
Additional Information: The copyright for this article belongs to American Institute of Physics Inc.
Keywords: Energy transfer; Forster resonance energy transfer; Relaxation processes, Acceptor energy; Energy-transfer rate; Excited vibrational state; Fluorescence resonance energy transfer; Rate-of-energy; State population; Vibrational relaxation; Vibrational relaxation rate, Excited states, absorption spectroscopy; adult; article; fluorescence resonance energy transfer; leisure; neglect
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 13 Jul 2021 11:49
Last Modified: 13 Jul 2021 11:49
URI: http://eprints.iisc.ac.in/id/eprint/68796

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