We envision the application of this strategy to elucidate the role of diverse chemical and biological environments to the decoherence, and to establish decoherence pathways for localized and delocalized, spinspecific and charge-transfer electronic excitations, and in molecules of varying size and rigidity. Further, the extracted spectral densities will be of general utility to characterize the dynamics of molecular chromophores with full chemical complexity using quantum master equations of increasing sophistication, and to advance our computational capabilities to accurately capture electron-nuclear interactions in condensed phase environments. .