A new study of theν2(A1) infrared band of phosphorus trifluoride
| Autor: | Hicham Msahal, Hamid Najib |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Infrared
Biophysics Analytical chemistry Infrared spectroscopy Rotational–vibrational spectroscopy Phosphorus trifluoride Condensed Matter Physics Quantum number chemistry.chemical_compound symbols.namesake Fourier transform chemistry Excited state symbols Physical and Theoretical Chemistry Atomic physics Fourier transform infrared spectroscopy Molecular Biology |
| Zdroj: | Molecular Physics. 109:1953-1956 |
| ISSN: | 1362-3028 0026-8976 |
| DOI: | 10.1080/00268976.2011.604048 |
| Popis: | The high-resolution Fourier transform infrared spectrum of phosphorus trifluoride (PF3) has been reinvestigated in the v2 = 1 vibrational excited state near 487 cm−1 (at a resolution of 3 × 10–3 cm–1). Thanks to our new accurate rotational ground-state C 0 value, 0.159970436(69) cm–1, and to recent pure rotational measurements, 318 new infrared transitions of the ν 2 fundamental band have been assigned, extending the rotational quantum number values up to K max = 71 and J max = 72. A merge, for the first time, of 135 reported microwave data (K max = 42 and J max = 49) within the v2 = 1 excited level and 2860 rovibrational transitions yielded improved constants of ν 2. Parameters of this band have been obtained, up to sextic centrifugal distortion constants, by least-squares fits, σ IR = 3.60 × 10–4 cm–1 and σ MW = 5.53 × 10–6 cm–1 (166 kHz). Comparison of these constants with those measured previously by infrared spectroscopy reveals orders of magnitude higher accuracy of these new values. |
| Databáze: | OpenAIRE |
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