title: Mass-analyzed threshold ionization study of vinyl chloride cation in the first excited electronic state using vacuum ultraviolet radiation in the 107-102.8 nm range.
abstract: Vibrational spectrum of vinyl chloride cation in the first excited electronic state, A2 A', was obtained by one-photon mass-analyzed threshold ionization (MATI) spectroscopy. Use of an improved vacuum ultraviolet radiation source based on four-wave sum frequency mixing in Hg resulted in excellent sensitivity for the MATI signals. From the MATI spectrum, the ionization energy to the A2 A' state of the cation was determined to be 11.6667 +/- 0.0006 eV. Nearly complete vibrational assignment for the MATI peaks was possible by utilizing the vibrational frequencies and Franck-Condon factors calculated at the DFT and TDDFT/B3LYP levels with the 6-311++G(3df,3pd) basis set. Geometry of the cation in the A2 A' state was determined by Franck-Condon fitting of the MATI spectrum.
authors.affiliation: National Creative Research Initiative Center for Control of Reaction Dynamics and School of Chemistry, Seoul National University, Seoul 151-742, Korea.
authors.forename: Mina
authors.initials: M
authors.lastname: Lee
authors.forename: Myung Soo
authors.initials: MS
authors.lastname: Kim
mesh_terms: D002412:Cations; D004583:Electrons; D013058:Mass Spectrometry; D011789:Quantum Theory; D013056:Spectrophotometry, Ultraviolet / Q000295:instrumentation / Q000379:methods; D014466:Ultraviolet Rays; D014618:Vacuum; D014732:Vibration; D014752:Vinyl Chloride / Q000737:chemistry*
chemical_list: D002412:Cations; D014752:Vinyl Chloride