February 1, 2019 at 11:15 pm

Chemistry Colloquium | Zirconium in the Spotlight: New Pathways to Photoluminescent Molecules, Feb. 4

Carsten Milsmann, portrait

Dr. Carsten Milsmann

Ohio University’s Chemistry and Biochemistry Colloquium Series presents Dr. Carsten Milsmann on “Zirconium in the Spotlight: New Pathways to Photoluminescent Molecules”, on Monday, Feb. 4, at 4:10 p.m. in Clippinger Laboratories 194.

Milsmann is an Assistant Professor with the C. Eugene Bennett Department of Chemistry an Biochemistry at West Virginia University.

The host is: Dr. Jessica White

Abstract: The efficient utilization of sunlight as a carbon-neutral, renewable energy source remains a challenge for scientists across many disciplines. The enormous scope of solar energy conversion on a global scale requires the development of photoactive materials from readily available and economically viable resources. Photoluminescent complexes based on earth-abundant early transition metals or main group elements present an attractive low-cost, low-toxicity alternative to precious metal photosensitizers commonly used in photochemical processes and solar energy conversion. However, the fundamentally different electronic structures of these elements requires the development of new approaches to light-induced charge separation and electron transfer.

This presentation will highlight the Milsmann group’s efforts to establish design principles for the generation of luminescent early transition metal complexes that can undergo photo-induced single electron transfer (SET) reactions upon irradiation with visible light. A particular focus will be on phosphorescent zirconium complexes that exhibit exceptionally long triplet excited state lifetimes. Our results show that these complexes can not only replace precious metal photosensitizers in photoredox catalytic reactions, but may exhibit optical properties that complement those of traditional late metal compounds. In addition, research towards the development of metal-free phosphorescent molecules based on silicon will be discussed.


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