Analyses of FT spectra of C2v ozone isotopologues in the 4500-5700 cm-1 region: 16O18O16O, 18O16O18O and 18O3

This work continues the systematic investigation of high resolution infrared spectra of O-18 enriched ozone isotopologues in the 4500-6300 cm(-1) spectral range. So far, the (OOO)-O-16-O-18-O-16 and (OOO)-O-18-O-16-O-18 spectra have been recorded and analysed using Fourier Transform Spectrometer (FTS) below 5000 cm(-1) and using high sensitivity Cavity Ring-Down Spectroscopy above 6000 cm(-1). In order to fill the gap between 5000 and 6000 cm(-1), new infrared spectra were recorded with the Reims FTS. The analyses of the 2v(1)+v(2)+3v(3) band of (OOO)-O-16-O-18-O-16 and of the 5v(3), v(1)+2v(2)+3v(3) and v(1)+5v(3) bands of (OOO)-O-18-O-16-O-18 are reported. New v(1)+2v(2)+3v(3) and v(1)+5v(3) bands of O-18(3) were also observed and analysed. Observed line positions were fitted using effective Hamiltonian models accounting for the dark state perturbations. The derived band centres and rotational constants are in a good agreement with new theoretical calculations from the molecular potential function. (C) 2014 Elsevier Ltd. All rights reserved.