Physical Chemistry Seminar: Dr. Akbar Salam, Wake Forest
Dr. Akbar Salam
Molecular QED Theory of Resonance Energy Transfer
Abstract: The fundamental theory of electron-photon interactions is quantum electrodynamics (QED). Its characteristic feature is the quantisation of the electromagnetic field. One of the successes of the molecular version of QED [1,2] is the unified description it provides of resonance energy transfer (RET) [1]. This process is viewed as arising from the exchange of a single virtual photon between an initially excited donor species and a ground state acceptor moiety. Asymptotic limits of the Fermi golden rule transition rate reveal a radiationless Förster type of exchange mechanism in the near-zone that has inverse sixth power separation distance dependence, and a radiative inverse square law behaviour at large displacements.
In this seminar an overview of the theory of molecular QED and its application to pair RET will be given first, before recent results are presented concerning the role that one and two additional passive polarisable molecules have in modifying the transfer rate [3,4]. Insight is gained into migration of energy in an environment of bath molecules by comparing these microscopic models of RET occurring between individual particles with a polariton based approach [5] in which direct excitation energy transfer is facilitated by medium-dressed photons.
[1] A. Salam, Molecular Quantum Electrodynamics, John Wiley & Sons, Inc., Hoboken, 2010.
[2] D. L. Andrews, G. A. Jones, A. Salam and R. G. Woolley, J. Chem. Phys. 148, 040901 (2018).
[3] A. Salam, J. Chem. Phys. 136, 014509 (2012).
[4] D. L. Andrews and J. S. Ford, J. Chem. Phys. 139, 014107 (2013).
[5] G. Juzeliunas and D. L. Andrews, Adv. Chem. Phys. 112, 357 (2000).
Carol Lynch Lecture Hall
Chemistry Complex
Host: Dr. Nitzan and Subotnik
inquiries rvargas@sas.upenn.edu
Department of Chemistry
231 S. 34 Street, Philadelphia, PA 19104-6323
215.898.8317 voice | 215.573.2112 fax | web@chem.upenn.edu
Events
- List View
- Calendar View
- Named Lecture Series
- Aldrich Distinguished Lecture
- Axalta Distinguished Lecture
- Bristol-Myers Squibb Lecture
- Distinguished Alumni Award
- Ralph and Lucy Hirschmann Visiting Professorship
- Madeleine M. Joullié Lecture
- Alan G. MacDiarmid Medal
- Novartis Lecture
- Edgar Fahs Smith Lecture
- Gilbert Stork Lecture
- Susan P. & Barry M. Trost Lecture
- Trustees Council for Penn Women Lecture
- NOBCChE Lecture
- Past Events
- Madeleine Joullié Symposium