The Engel Group strives to exploit femtosecond dynamics to steer and to control excited state reactivity. We use a combination of ultrafast spectroscopy, theory, synthesis, and biophysics to approach this problem.
Nature has had 2.4 billion years to evolve and engineer excited state dynamics. From photosynthesis to vision to photoenzymes, we examine natural mechanisms to steer excited states. Our goal is to isolate and identify new design principles to control quantum dynamics.
Electronic excited states carry enough energy to make and break chemical bonds. Photochemistry operates manifestly outside the Born-Oppenheimer regime -- thereby escaping our standard chemical intuition. We seek new strategies to steer excited states and to control their reactivity.
You can't engineer what you can't see. We build new spectroscopic tools to probe femtosecond dynamics of electronic excitations. In living cells, protein complexes, and small molecules, we capture how these systems evolve with unprecedented depth and specificity.
Congratulations to Sara Hess on winning the Nathan Sugarman Teaching Award from the Department of Chemistry.
Congratulations to Dr. Ved Singh on successfully defending his dissertation!
Congratulations to John Otto on receiving a travel grant to attend a Gordon Research Seminar on Molecular Dynamics and Spectroscopy this summer where he will give an oral presentation.
M.L. Flanagan, P.D. Long, P.D. Dahlberg, B.S. Rolczynski, S.C. Massey, and G.S. Engel, "Mutations to R. sphaeroides Reaction Center Perturb Energy Levels and Vibronic Coupling but Not Observed Energy Transfer Rates" JPC A, 120 1479-1487 2016.
C. She, I. Fedin, D.S. Dolzhnikov, P.D. Dahlberg, G.S. Engel, R.D. Schaller, D.V. Talapin, "Red, Yellow, Green, and Blue Amplified Spontaneous Emission and Lasing Using Colloidal CdSe Nanoplatelets" ACS Nano. 2015.
P.D. Dahlberg, G.J. Norris, C. Wang, S. Viswanathan, V.P. Singh, and G.S. Engel , "Communication: Coherences observed in vivo in photosynthetic bacteria using two-dimensional electronic spectroscopy" J. Chem. Phys. 143, 101101 2015.
V. P. Singh, M. Westberg, C. Wang, P. D. Dahlberg, T. Gellen, A. T. Gardiner, R. J. Cogdell, and G. S. Engel, "Towards quantification of vibronic coupling in photosynthetic antenna complexes" J. Chem. Phys. 142, 212446 2015.
Y. Zheng, S. Oh, F.H. Alharbi, G.S. Engel, and S. Kais, "Delocalized quantum states enhance photocell efficiency" Phys. Chem. Chem. Phys. 17, 5743-5750 2015.