Abstract
The infrared spectrum of a sample containing 13C mono-substituted isotopologues of acetylene, H12C13CH, H12C13CD, D12C13CH and D12C13CD has been recorded in the 6130−6800 cm− 1 region using a femto-Fourier transform-cavity enhanced absorption spectroscopy (femto-FT-CEAS) apparatus. Three bands for both H12C13CD and D12C13CH were observed and analysed, namely 2ν1 − GS and associated hot bands from ν4 and ν5. The assignment of the 2ν1 overtone already reported in the literature [J.L. Hardwick, Z.T. Martin, M.J. Pilkenton, E.N. Wolf, J. Mol. Spectrosc. 243, 10 (2007)] was considerably extended to higher J values. For the D12C13CD isotopologue, four bands were analysed, ν1 + ν2 + ν3 − GS and associated hot bands from ν 4 and ν 5 and 2ν1 + ν4 + ν5 − GS.
Acknowledgements
The Bologna group acknowledges the financial support of the Ministero dell’Istruzione dell’Università e della Ricerca (PRIN-09 ‘Spettroscopia molecolare per la Ricerca Atmosferica e Astrochimica: Esperimento, Teoria ed Applicazioni’) and the Alma Mater Studiorum Università di Bologna. The Belgian group thanks the ‘Action de Recherches Concertées de la Communauté française de Belgique’ and FNRS/FRIA for financial support.
Notes
a In cm− 1. For the definition of the band centre νC see text.
b σ (in cm− 1) corresponds to the standard deviation of the fit.