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Integrated IR band intensities of the v 5 and v 1 bands of ClOOCl
Author(s) -
Brust A. S.,
Zabel F.,
Becker K. H.
Publication year - 1997
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/97gl01273
Subject(s) - spectral line , spectrometer , laser , absorption (acoustics) , analytical chemistry (journal) , materials science , absorption spectroscopy , diode , infrared , absorption band , spectral bands , line (geometry) , tunable laser , atomic physics , optics , physics , chemistry , optoelectronics , geometry , mathematics , chromatography , astronomy
ClOOCl was prepared in situ in two static reactors and in a flow tube by photolyzing OClO or by the reaction of Cl with O 3 , at temperatures ≤253 K. IR and UV spectra were monitored simultaneously, and concentrations of ClOOCl were determined from the known UV absorption cross sections. Based on these concentrations, absorption coefficients and integrated band intensities of the v 5 and v 1 bands of ClOOCl near 650 cm −1 and 750 cm −1 were derived for spectral resolutions between 1 and 0.125 cm −1 using a FTIR spectrometer. Diode laser spectra of several regions of the v 5 band demonstrate that the rotational structure of this band can be resolved at total pressures of several mbar. The low line intensities of the 650 cm −1 band, however, do not allow to detect ClOOCl by airborne diode laser absorption at today's detection sensitivities.