Spin and Spin Polarization Effects in Molecule-Based Electron and Energy Transfer
- James McCusker, MSU Chemistry
Thursday, March 28, 4:10 PM - Physics and Astronomy Colloquium
Biomedical & Physical Sciences Bldg., Rm. 1415
Electron spin is a fundamental property of Nature. Although many of the more common physical observables linked to spin are well documented (e.g. magnetism, spin-allowed v. spinforbidden optical transitions), the degree to which spin and spin polarization permeates the chemistry of molecular systems is not as clear. This notion, namely the effect of spin and spin polarization on the physical and chemical properties of molecules, constitutes the conceptual underpinning of our research effort. Specifically, we are pursuing the design and development of chemical systems that will allow us to determine whether there exists a cause-and-effect relationship between the physical and/or photophysical properties of molecules and their innate spin properties, and if so, to what extent we can exploit this connection in order to manipulate the chemical reactivity of molecular systems. Several projects ongoing in the group specific to our interest in energy and electron transfer processes will be described, including proof-of principle results for manipulating dipolar (i.e., Förster) energy transfer in a covalently-linked donor-acceptor assembly, 1 as well as efforts currently underway to extend these concepts to molecular wires where zero-field spin polarization could be used to control electron flow.
1 Guo, D.; Knight, T.E.; McCusker, J.K. Science 2011, 334, 1684.