Researchers in the Kudisch Lab utilize ultrafast spectroscopy as a central tool to uncover the physical chemistry that underlies modern progress in synthetic photochemistry. The following three research thrusts span the spectroscopic study of novel photoreagents used in photoredox catalysis, polymer recycling, and more. To us, widespread application of these new photonic toolbox reactions is implicitly intertwined with their mechanistic understanding, thus necessitating a detailed knowledge of these photoreagent excited-states.