LATE TRANSITION METAL ORGANOMETALLICS AS NONLINEAR OPTICAL MATERIALS
Abstract
Families of organo-gold and -iridium complexes will be synthesized and evaluated for excited-state light absorption. In new directions, the Gray research laboratory seeks broadband nonlinear optical chromophores that act across the visible and near-infrared spectrum. We also propose chromophores that enhance cross-molecule charge transfer, thereby augmenting two-photon absorption and reverse saturable absorption. Our primary emphasis will be excited-state characterization through static and ultrafast spectroscopy. Throughout, we seek structure-function relationships that enable the rational design of third-order nonlinear optical materials. This research will be executed collaboratively between CWRU and the professionals at the Materials and Manufacturing Directorate, Air Force Research Laboratory; and the United States Air Force Academy. The three-year goal of this research is to create nonlinear optical materials that function across ultraviolet, visible, and near-infrared wavelengths. The objective is to characterize the excited states of molecular organometallics with a focus on excited-state absorption. The central hypothesis is that the spin-orbit coupling of heavy metal atoms populates long-lived triplet states that themselves absorb light. The rationale is that the 5d transition metals are versatile heavy atoms that support nonlinear light absorption across multiple oxidation states.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 20, 2023
- Source ID
- FA95502210436
Entities
People
- Thomas G Gray
Organizations
- Air Force Office of Scientific Research
- Case Western Reserve University
- United States Air Force