Delineating Ground to Excited State Vibrational Signatures of Anionic Flavin Adenine Dinucleotide in Aqueous Solution

. Such a site-specific spectroscopic study of FAD in the physiologically-relevant water environment by tuning both pH and excitation wavelengths complements the current understanding of correlated FAD electronic and structural dynamics, better bridging the more characterized FAD redox behavior to fundamental insights into photophysical properties of this versatile biological cofactor.