VUV electronic state spectroscopy of 1,1-difluoroethene and difluorochloromethane by high resolution synchrotron radiation

High resolution VUV photoabsorption spectra of 1,1-difluoroethene (C(2)H(2)F(2)) and difluorochloromethane (CF(2)HCl) are reported in the wavelength range 115-200 nm (10.8-6.2 eV). New photoabsorption features are observed in C(2)H(2)F(2) and some Rydberg and vibrational assignments are proposed for...

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Veröffentlicht in:	Physical chemistry chemical physics : PCCP 2006-01, Vol.8 (41), p.4766-4772
Hauptverfasser:	LIMAO-VIEIRA, P, VASEKOVA, Eva, RAJA SEKHAR, B. N, MASON, N. J, HOFFMANN, S. V
Format:	Artikel
Sprache:	eng
Schlagworte:	Absorption Atmosphere Carbon - chemistry Chemistry Chlorofluorocarbons - chemistry Earth (Planet) Electrons Exact sciences and technology Extraterrestrial Environment Fluorine - chemistry General and physical chemistry Hydrogen - chemistry Molecular Conformation Photochemistry Photolysis Physical chemistry of induced reactions (with radiations, particles and ultrasonics) Radiation Spectrophotometry, Ultraviolet - methods Thermodynamics Vibration
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Zusammenfassung:	High resolution VUV photoabsorption spectra of 1,1-difluoroethene (C(2)H(2)F(2)) and difluorochloromethane (CF(2)HCl) are reported in the wavelength range 115-200 nm (10.8-6.2 eV). New photoabsorption features are observed in C(2)H(2)F(2) and some Rydberg and vibrational assignments are proposed for the first time. Evidence for a weak vibrational pattern in CF(2)HCl is discussed here for the first time. Absolute cross section values have been obtained allowing photolysis lifetimes to be derived in the Earth's troposphere and stratosphere.
ISSN:	1463-9076 1463-9084
DOI:	10.1039/b610978k