Resonance-Enhanced Multiphoton Ionization Studies of the Lower Electronically Excited States of Flavone.

ABSTRACT: The spectroscopic and dynamics properties of flavone─the core chromophore of a wide variety of naturally occurring ultraviolet protecting filters─have been studied under supersonic beam conditions using (1 + 1') resonance-enhanced two-photon ionization spectroscopic techniques. Excitation spectra recorded under such conditions are found to differ significantly from previously reported spectra. Pump-probe studies find that intersystem crossing is the dominant decay pathway of the excited singlet manifold, in agreement with previous solution phase studies and quantum chemical predictions for the isolated molecule. Microsolvation studies on flavone-water clusters reveal that the addition of one and two water molecules leads to considerable shifts in excitation energies but that further comple

SUBMITTER: Fan J 

PROVIDER: S-EPMC9969512 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature