We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Sub-100-fs energy transfer in coenzyme NADH is a coherent process assisted by a charge-transfer state.
- Authors
Jaiswal, Vishal Kumar; Aranda Ruiz, Daniel; Petropoulos, Vasilis; Kabaciński, Piotr; Montorsi, Francesco; Uboldi, Lorenzo; Ugolini, Simone; Mukamel, Shaul; Cerullo, Giulio; Garavelli, Marco; Santoro, Fabrizio; Nenov, Artur
- Abstract
Excitation energy transfer (EET) is a key photoinduced process in biological chromophoric assemblies. Here we investigate the factors which can drive EET into efficient ultrafast sub-ps regimes. We demonstrate how a coherent transport of electronic population could facilitate this in water solvated NADH coenzyme and uncover the role of an intermediate dark charge-transfer state. High temporal resolution ultrafast optical spectroscopy gives a 54±11 fs time constant for the EET process. Nonadiabatic quantum dynamical simulations computed through the time-evolution of multidimensional wavepackets suggest that the population transfer is mediated by photoexcited molecular vibrations due to strong coupling between the electronic states. The polar aqueous solvent environment leads to the active participation of a dark charge transfer state, accelerating the vibronically coherent EET process in favorably stacked conformers and solvent cavities. Our work demonstrates how the interplay of structural and environmental factors leads to diverse pathways for the EET process in flexible heterodimers and provides general insights relevant for coherent EET processes in stacked multichromophoric aggregates like DNA strands. Excitation energy transfer is important for many photoinduced biological processes in systems with multiple chromophores. Here, the authors elucidate this process for the coenzyme NADH using ultrafast spectroscopy and quantum dynamics.
- Subjects
ENERGY transfer; NAD (Coenzyme); MOLECULAR vibration; QUANTUM theory; OPTICAL spectroscopy; POLAR solvents; CONFORMATIONAL analysis
- Publication
Nature Communications, 2024, Vol 15, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-024-48871-4