Vibronisches Spektralverhalten von Molekülen; Theoretische Spektrumkonturen der schwingungsstrukturierten Fluoreszenz des kon‐tordierten 1,1‐Diphenyl‐ethens

High-Resolution Spectroscopy of Jet-Cooled 1,1′-Diphenylethylene: Electronically Excited and Ionic States of a Prototypical Cross-Conjugated System

“…53 Studies on the spectroscopy and dynamics of electronically excited states are limited to a series of reports by Gustav and B€ olke more than 25 years ago. [54][55][56][57] In the present work we have used mass-resolved, high-resolution spectroscopic techniques to study the spectroscopic and dynamic properties of DPE under isolated and internally cooled molecule conditions. Electronic excitation spectra of the lower excited singlet states obtained by resonance enhanced two photon ionization (R2PI) spectroscopy display a vast amount of vibronic activity that nevertheless can be assigned confidently using the results of quantum chemical calculations.…”

“…Experimentally, IR absorption and Raman spectroscopy has been used to investigate the ground state vibrational structure, , while the lower ionic manifold has been studied with He I photoelectron spectroscopy as part of studies on the effects of steric inhibition of resonance . Studies on the spectroscopy and dynamics of electronically excited states are limited to a series of reports by Gustav and Bölke more than 25 years ago. − …”