High resolution laser spectroscopy as a tool to investigate dynamics in large molecules and molecular clusters

Abstract

Much information on the dynamical and structural properties of electronically excited states can be substracted from (ultra) high resolution laser spectroscopy with MHz resolution. This is demonstrated on the radiationless transitions from the first excited singlet state in pyrazine and the spectra of tetracene and its van der Waals complexes with noble gases. In both systems the existence of interstate coupling is clearly observable, while in pyrazine the individual molecular eigenstates have been studied in the frequency and in the time domain.