(10/16) Dr. Bradley Arnold
Dr. Bradley Arnold
UNIVERSITY OF MARYLAND BALTIMORE COUNTY
Department of Chemistry/Biochemistry
Friday, October 16, 2020
“Photo-induced Electron Transfer in Microheterogeneous Environments. Mimicking Photosynthetic Reaction Centers.”
Photosynthesis is Nature’s way of using light to store energy. Our research seeks to understand the pivotal initial charge-separation processes in related model systems to enhance the efficiency of energy storage devices. The photochemical generation of ion pairs plays a fundamental role in many important applications including photo-voltaic “solar cell” devices, light emitting diodes, photon detection systems, and optical electronics. Charge transfer complex formation is shown to be a convenient platform for studying the rapid production of ion pairs and monitoring their dynamic behavior. Recent advances in the interpretation of absorption and emission spectra using Marcus – Hush theory for electron transfer are coupled with ultra-fast kinetic measurements to try to understand dynamic behavior of ion pairs in solution and in the solid state. This research is now being projected into micro-heterogeneous environments to try to mimic naturally occurring photoreaction centers.