Diode Laser Spectrum of HCCCN near 5 pm * The Hot Band

Abstract

Two hot bands associated with the vs vibration-rotation band of cyanoacetylene, HC3N, have been measured with a diode laser spectrometer in the 2060-2100 cm-1 range. Since the width of the observed lines is essentially determined by Doppler broadening, the splitting of the hot band rovibrational transitions due to /-type doubling could be resolved and was assigned. Improved spectral parameters were obtained, including the anharmonicity parameters.

Rotational and High-resolution Infrared Spectrum of HC 3 N: Global Ro-vibrational Analysis and Improved Line Catalog for Astrophysical Observations

“…The investigation of the IR laboratory spectrum of HC 3 N started in the 70's and continued in the following decades with a number of low-resolution studies mainly aimed at the measurements of the absolute band intensities (Uyemura & Maeda 1974;Uyemura et al 1982;Khlifi et al 1990Khlifi et al , 1992. Rotationally resolved measurements were first performed in the 5 µm spectral region by Yamada et al (1980) and Yamada & Winnewisser (1981) with a IR diode laser spectrometer. The same authors also carried out a medium resolution study of the low energy portion of the mid-IR spectrum (Yamada & Bürger 1986).…”

Cavity Ring Down Spectroscopy Measurements for High-Overtone Vibrational Bands of HC3N

“…Yamada et al have appended the high-resolution results of Mallinson and Fayt with new data concerning the fundamental and hot bands of the ν 3 , and ν 2 modes, as well as the ν 5 and ν 6 fundamentals . Arié et al analyzed 22 ro-vibrational bands including ν 5 , ν 6 , and the associated hot bands.…”

“… a In ref . b In ref . c In ref . d In ref . e In ref . f In ref . g In ref . h In ref ; these values, concerning the ν 1 band system around 3327 cm –1 (bold font), are thoroughly discussed in the text. i In ref ; band center positions derived from the intersections of P and R rotational envelopes. j In ref . k In ref . …”

Synchrotron-based far-infrared spectroscopy of HC3N: Extended ro-vibrational analysis and new line list up to 3360 cm−1<

“…While no spectrum was reported in the literature for the FIR region, some data were available for the stretching modes. In particular, after the first medium resolution (0.025-0.050 cm −1 ) study of the 1800-6500 cm −1 region [12], higher-resolution spectra of the ν 1 [13], ν 2 [14], ν 3 [15], and some of their hot-bands [13,16] were reported.…”