Excited-state charge transfer dynamics in systems of aromatic adsorbates on TiO_2 studied with resonant core techniques

摘要

Resonant core spectroscopies are applied to a study of the excited electron transfer dynamics on a low-femtosecond time scale in systems of aromatic molecules (isoniotinic acid and bi-isonicotinic acid)adsorbed on a rutile TiO_2 (110)semiconductor surface.Depending on which adsorbate state is excited,the electron is either localized on the adsorbated in a excitonic effiect,or delocalizes rapidly into the substrate in less than 5 fs (3 fs)for isonicotinic acid (bi-isonicotinic acid).The results are obtained by te application of a variant of resonant photoemissin spectroscopy.