Chemistry Department Seminar: Renee Frontiera ('04), U. Minnesota, TC
Following chemical reactions at the ultimate limits of space and time
Renee Frontiera ('04)
University of Minnesota, Twin Cities
This talk will focus on following chemical reactions as they occur through the use of an innovative technique called Femtosecond Stimulated Raman Spectroscopy (FSRS). FSRS follows vibrational structure on the time scale of nuclear motion, allowing us to obtain molecular snapshots as bonds are being formed and broken. I will discuss using the FSRS technique to follow the excited state proton transfer in the Green Fluorescent Protein. Surprisingly, it is a vibrational motion which drives the reaction and makes this protein so fluorescent. I will then show recent efforts to extend FSRS to the single molecule regime by the use of the enhanced electromagnetic fields present near plasmonic nanoparticles. This new ultrafast surface-enhanced Raman technique can now be used to follow photochemical changes occurring near excited plasmons. Finally, I’ll discuss current research in my group, specifically on developing a new microscopy technique to look at structure in living cells on the 1-10 nm length scale, approximately the size of a single transmembrane protein.
Sponsored by Chemistry. Contact: Will Hollingsworth, x4412