Two-color resonant two-photon ionization and mass-analyzed threshold ionization spectroscopy of o-chloroanisole
Journal
Journal of Photochemistry and Photobiology A
Journal Volume
243
Pages
73--79
Date Issued
2012-09
Author(s)
Abstract
We applied the two-color resonant two-photon ionization and mass-analyzed threshold ionization techniques to record the vibrationally resolved spectra of the selected isotopomers of o-chloroanisole in the electronically excited S 1 and cationic ground D 0 states. As supported by our theoretical calculations, only the trans form of o-chloroanisole involves in the two-photon photoexcitation and ionization processes. The band origins of the S 1 ← S 0 electronic transition and adiabatic ionization energies for the 35Cl and 37Cl isotopomers of o-chloroanisole are found to be the same within our detection limit, with the values of 35 745 ± 2 and 66 982 ± 5 cm -1, respectively. The general spectral features of the two isotopomers are nearly identical and result from in-plane ring deformation and substituent-sensitive bending and stretching as well as the CH 3 torsional motions. © 2012 Elsevier B.V. All rights reserved.
Type
journal article