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Two-color resonant two-photon ionization and mass-analyzed threshold ionization spectroscopy of o-chloroanisole

Paper ID Volume ID Publish Year Pages File Format Full-Text
28055 44057 2012 7 PDF Available
Title
Two-color resonant two-photon ionization and mass-analyzed threshold ionization spectroscopy of o-chloroanisole
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 S1 and cationic ground D0 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 S1 ← S0 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 CH3 torsional motions.

Graphical abstractVibronic and cation spectra of o-chloroanisoleFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The vibronic and cation spectra of o-chloroanisole have been recorded. ► Only trans o-chloroanisole involves in our R2PI and MATI experiments. ► Most of the active vibrations result from the in-plane ring vibrations. ► The Cl substituent can affect transition energy and molecular vibrations.

Keywords
Resonant two-photon ionization; Mass-analyzed threshold ionization; o-Chloroanisole; Isotopomer; Vibronic spectra; Cation spectra
First Page Preview
Two-color resonant two-photon ionization and mass-analyzed threshold ionization spectroscopy of o-chloroanisole
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 243, 1 September 2012, Pages 73–79
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering