Theory and calculation for the electronic coupling in excitation energy transfer
Article first published online: 7 AUG 2013
© 2013 The Authors. International Journal of Quantum Chemistry Published by Wiley Periodicals, Inc.
This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
International Journal of Quantum Chemistry
Volume 114, Issue 2, pages 102–115, 15 January 2014
How to Cite
How to cite this article: Int. J. Quantum Chem. 2014, 114, 102–115. DOI: 10.1002/qua.24528,
- Issue published online: 5 DEC 2013
- Article first published online: 7 AUG 2013
- Manuscript Accepted: 17 JUL 2013
- Manuscript Revised: 12 JUL 2013
- Manuscript Received: 31 MAY 2013
- energy transfer;
- electronic coupling;
- Förster dipole coupling;
- Dexter exchange coupling;
- ab initio quantum chemistry
Excitation energy transfer (EET) is a process where the electronically excitation is transferred from a donor to an acceptor. EET is widely seen in both natural and in artificial systems, such as light-harvesting in photosynthesis, the fluorescence resonance energy transfer technique, and the design of light-emitting molecular devices. In this work, we outline the theories describing both singlet and triplet EET (SEET and TEET) rates, with a focus on the physical nature and computational methods for the electronic coupling factor, an important parameter in predicting EET rates. The SEET coupling is dominated by the Coulomb coupling, and the remaining short-range coupling is very similar to the TEET coupling. The magnitude of the Coulomb coupling in SEET can vary much, but the contribution of short-range coupling has been found to be similar across different excited states in naphthalene. The exchange coupling has been believed to be the major physical contribution to the short-range coupling, but it has been pointed out that other contribution, such as the orbital overlap effect is similar or even larger in strength. The computational aspects and the subsequent physical implication for both SEET and TEET coupling values are summarized in this work. © 2013 The Authors. International Journal of Quantum Chemistry Published by Wiley Periodicals, Inc.