The infrared and Raman spectra of deuterated acetylene containing one 13C atom, 13C12CD2, have been recorded and analysed to obtain detailed information on the fundamental 2 band and associated combination and hot bands. Infrared spectra were recorded at 0.004 cm1 resolution in the region 11502900 cm1, which contains combination and hot bands associated with the ground and the bending v4 = 1 and v5 = 1 states. The Qbranches of the 2 fundamental and associated hot bands (2+44, 2+55, 2+2424, 2+2525 and 2+4+5 (4+5)) were recorded using inverse Raman spectroscopy, with an instrumental resolution of about 3103 cm1. In addition, the observation of the 222 Raman band was carried out by populating the v2 = 1 state by stimulated Raman pumping. In total, 11 Raman and 9 infrared bands were analysed, involving all the lvibrational components of the excited stretchingbending states up to vt = v4 + v5 = 2. A simultaneous analysis of all infrared and Raman assigned transitions has been performed on the basis of a theoretical model which takes into account the rotation and vibration ltype resonances within each vibrational manifold and the DarlingDennison anharmonic resonance between the 2+24 and 2+25 states. The obtained parameters reproduce the assigned wavenumbers with a standard deviation of the same order of magnitude as the experimental uncertainty
High Resolution Infrared and Raman spectroscopy of nu2 and related combination and hot bands of 13C12CD2
DI LONARDO, GIANFRANCO;FUSINA, LUCIANO;
2011
Abstract
The infrared and Raman spectra of deuterated acetylene containing one 13C atom, 13C12CD2, have been recorded and analysed to obtain detailed information on the fundamental 2 band and associated combination and hot bands. Infrared spectra were recorded at 0.004 cm1 resolution in the region 11502900 cm1, which contains combination and hot bands associated with the ground and the bending v4 = 1 and v5 = 1 states. The Qbranches of the 2 fundamental and associated hot bands (2+44, 2+55, 2+2424, 2+2525 and 2+4+5 (4+5)) were recorded using inverse Raman spectroscopy, with an instrumental resolution of about 3103 cm1. In addition, the observation of the 222 Raman band was carried out by populating the v2 = 1 state by stimulated Raman pumping. In total, 11 Raman and 9 infrared bands were analysed, involving all the lvibrational components of the excited stretchingbending states up to vt = v4 + v5 = 2. A simultaneous analysis of all infrared and Raman assigned transitions has been performed on the basis of a theoretical model which takes into account the rotation and vibration ltype resonances within each vibrational manifold and the DarlingDennison anharmonic resonance between the 2+24 and 2+25 states. The obtained parameters reproduce the assigned wavenumbers with a standard deviation of the same order of magnitude as the experimental uncertaintyI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.