The rotational spectrum of trifluoroacetic acid has been recorded at room temperature in the 18–26 GHz frequency range using a chirped-pulse Fourier transform microwave (CP-FTMW) spectrometer. More than 180 new spectral lines have been identified and assigned to transitions within the vibrational ground state. A global fitting has been performed by incorporating spectroscopic data from previous studies, leading to the refinement of the molecular parameters. Two fitting models using Watson's S-reduction and A-reduction are proposed, allowing the determination of h3 for the first model and ΦJK, ΦKJ, and ϕK for the second one.
Naso, G., Baroncelli, F., Evangelisti, L., Maris, A., Melandri, S. (2025). Rotational spectrum of trifluoroacetic acid: Extension of the measurements by chirped-pulse spectroscopy. JOURNAL OF MOLECULAR SPECTROSCOPY, 408, 1-6 [10.1016/j.jms.2025.111986].
Rotational spectrum of trifluoroacetic acid: Extension of the measurements by chirped-pulse spectroscopy
Baroncelli F.
Secondo
;Evangelisti L.;Maris A.Penultimo
;Melandri S.Ultimo
2025
Abstract
The rotational spectrum of trifluoroacetic acid has been recorded at room temperature in the 18–26 GHz frequency range using a chirped-pulse Fourier transform microwave (CP-FTMW) spectrometer. More than 180 new spectral lines have been identified and assigned to transitions within the vibrational ground state. A global fitting has been performed by incorporating spectroscopic data from previous studies, leading to the refinement of the molecular parameters. Two fitting models using Watson's S-reduction and A-reduction are proposed, allowing the determination of h3 for the first model and ΦJK, ΦKJ, and ϕK for the second one.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
