Studies on the photoactive yellow protein (PYP) chromophores have revealed important aspects of the intrinsic properties including the conformational heterogeneity, excited state dynamics, and important barrier and decay channels in the excited states. Additionally, studies on trans-azobenzene led to groundbreaking results including the first high-resolution spectra recorded for the S1(nπ*) and S2(ππ*) states of trans azobenzene that uncover the dynamics and trans-cis photoisomerization mechanism. By performing studies on clusters of molecules with water, specifically a UV-B filter commonly used in sunscreen products, Eric found out that the addition of water increases the effectiveness of sunscreen.
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