October 3, 2013
Graduate Student - Chemistry Department, University of Rochester
The Role of the Triplet State in Solar Hydrogen Production
A series of Boron dipyrromethene (Bodipy) dyes with applications for hydrogen production were synthesized and characterized by ultrafast transient absorption spectroscopy and photolysis. The addition of a heavy halogen increases the spin-orbit coupling of the molecules, facilitating intersystem crossing into a long-lived triplet state. Hydrogen production was found to proceed from the triplet state, as it was only produced from halogenated compounds. Transient absorption was used to probe the excited state dynamics of the dyes, shedding light on their hydrogen generating activity.