Issue 16, 2024

Resonance energy transfer in orthogonally arranged chromophores: a question of molecular representation

Abstract

Energy transfer between orthogonally arranged chromophores is typically considered impossible according to conventional Förster resonance energy transfer theory. Nevertheless, the disruption of orthogonality by nuclear vibrations can enable energy transfer, what has prompted the necessity for formal expansions of the standard theory. Here, we propose that there is no need to extend conventional Förster theory in such cases. Instead, a more accurate representation of the chromophores is required. Through calculations of the energy transfer rate using structures from a thermal ensemble, rather than relying on equilibrium geometries, we show that the standard Förster resonance energy transfer theory is still capable of describing energy transfer in orthogonally arranged systems. Our calculations explain how thermal vibrations influence the electronic properties of the states involved in energy transfer, affecting the alignment of transition dipole moments and the intensity of transitions.

Graphical abstract: Resonance energy transfer in orthogonally arranged chromophores: a question of molecular representation

Supplementary files

Article information

Article type
Paper
Submitted
29 Jan 2024
Accepted
01 Apr 2024
First published
04 Apr 2024
This article is Open Access
Creative Commons BY license

Phys. Chem. Chem. Phys., 2024,26, 12299-12305

Resonance energy transfer in orthogonally arranged chromophores: a question of molecular representation

R. Jacobi and L. González, Phys. Chem. Chem. Phys., 2024, 26, 12299 DOI: 10.1039/D4CP00420E

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