Vitamin B12 is a family of biologically essential cofactors containing a cobalt that is coordinated equatorially to a corrin ring and axially to a variety of possible ligands. The Co site in vitamin B12 catalyzes a wide range of both 1- and 2-electron reactivity. The B12 unit has a rich, well-characterized photochemistry which is believed to have direct relevance to its non-photochemical reactivity. This connection has grown stronger with the recent discovery that some organisms use B12 as the photosensor for a photoactivated transcriptional regulation. This talk will explore the ability of both K- and L-edge X-ray absorption and X-ray emission to elucidate the photophysics and photochemistry of vitamin B12, with particular emphasis on femtosecond time-resolved measurements.
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Meeting ID: 971 8840 7576
Sakura Pascarelli / Gabriella Mulá-Mathews