Probing Spin Polarized Electron Dynamics in Magnetic Semiconductors- A New Platform for Spin Selective Photochemistry
Abstract
It has long been understood that photochemical complexes in nature carefully control both the charge and spin states of reaction intermediates during solar to chemical energy conversion. Despite this understanding, controlling spin dynamics has been largely neglected in the field of photocatalysis. Here we aim to demonstrate that magnetic semiconductors represent an unexplored class of materials showing photo-induced spin selectivity rivaling or exceeding the best-known systems. A direct result of this work will be the development of new catalysts for enantioselective asymmetric hydrogenation chemistry. To accomplish these goals, we will pursue the following three aims- Aim 1 will use ultrafast extreme ultraviolet (XUV) spectroscopy to study the mechanism of spin selective electron transport in magnetic semiconductors. Aim 2 will build on Aim 1 by combining XUV measurements with circularly polarized Raman spectroscopy to understand coupling between nuclear motion and electron spin and how this coupling controls spin selective transport. Aim 3 will use the magnetic semiconductors explored above as a platform for spin selective photocatalysis to demonstrate the first example of asymmetric hydrogenation based entirely on spin selectivity. This project promises two major benefits- First, it will advance the field of spin selective catalysis by identifying new materials that can serve as a platform for enantioselective photoredox chemistry. Second, it will provide key insights into the origin and mechanism of spin selectivity based on direct observation of spin dependent electron dynamics in magnetic oxides. Consequently, this project will impact multiple emerging fields developing around the rapidly growing interest in spin selectivity by providing the mechanistic insight needed to control spin selective transport in a wide class of earth abundant materials.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 06, 2024
- Source ID
- FA95502310326
Entities
People
- Lawrence Baker
Organizations
- Air Force Office of Scientific Research
- Ohio State University
- United States Air Force