ArticlePhotosynthesis research2020
Intramolecular vibrations enhance the quantum efficiency of excitonic energy transfer.
Article in Photosynthesis research, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed.
- Vibronic Coherence in a Minimal Pigment-Protein Complex Probed by Two-Dimensional Electronic-Vibrational Spectroscopy.The journal of physical chemistry. B · 2026Article
- Minimization of Disorder as a Key Design Principle for Natural Sizes of Light Harvesting 2 Complexes.The journal of physical chemistry letters · 2026Article
- Docosahexaenoic Acid Explains the Unexplained in Visual Transduction.Entropy (Basel, Switzerland) · 2023Article
- Population and coherence dynamics in large conjugated porphyrin nanorings.Chemical science · 2022Article
- Ultrafast processes in photosynthetic light-harvesting.Photosynthesis research · 2020Article
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4 authors.
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Abstract
We study the impact of underdamped intramolecular vibrational modes on the efficiency of the excitation energy transfer in a dimer in which each state is coupled to its own underdamped vibrational mode and, in addition, to a continuous background of environmental modes. For this, we use the numerically exact hierarchy equation of motion approach. We determine the quantum yield and the transfer time in dependence of the vibronic coupling strength, and in dependence of the damping of the incoherent background. Moreover, we tune the vibrational frequencies out of resonance with the excitonic energy gap. We show that the quantum yield is enhanced by up to 10% when the vibrational frequency of the donor is larger than at the acceptor. The vibronic energy eigenstates of the acceptor acquire then an increased density of states, which leads to a higher occupation probability of the acceptor in thermal equilibrium. We can conclude that an underdamped vibrational mode which is weakly coupled to the dimer fuels a faster transfer of excitation energy, illustrating that long-lived vibrations can, in principle, enhance energy transfer, without involving long-lived electronic coherence.
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