Excited state dynamics of cis, cis-1, 3-cyclooctadiene: UV pump VUV probe time-resolved photoelectron spectroscopy

Yusong Liu, Pratip Chakraborty, Spiridoula Matsika, Thomas Weinacht

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Abstract

We present UV pump, vacuum ultraviolet probe time-resolved photoelectron spectroscopy measurements of the excited state dynamics of cis,cis-1,3-cyclooctadiene. A 4.75 eV deep UV pump pulse launches a vibrational wave packet on the first electronically excited state, and the ensuing dynamics are probed via ionization using a 7.92 eV probe pulse. The experimental results indicate that the wave packet undergoes rapid internal conversion to the ground state in under 100 fs. Comparing the measurements with electronic structure and trajectory surface hopping calculations, we are able to interpret the features in the measured photoelectron spectra in terms of ionization to several states of the molecular cation.
Original languageEnglish
Article number074301
JournalThe Journal of Chemical Physics
Volume153
Issue number7
Early online date17 Aug 2020
DOIs
Publication statusPublished - 21 Aug 2020

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