High-Resolution FTIR Spectroscopy of CH₃F: Global Effective Hamiltonian Analysis of the Ground State and the 2<i>ν</i>₃, <i>ν</i>₃ + <i>ν</i>₆, and 2<i>ν</i>₆ Bands.

ABSTRACT: High-resolution Fourier transform infrared (FTIR) spectra of methyl fluoride (CH₃F) were recorded in the mid- and far-infrared regions using the Bruker IFS 125HR spectrometers at GSMA (Reims, France) and at the SOLEIL synchrotron facility (Saint-Aubin, France). The measurements cover both the pure rotational transitions of the ground state (10-100 cm^-1) and the vibrational triad region (1950-2450 cm^-1), which includes the 2ν3, ν3+ν6, and 2ν6 bands. Spectra were recorded under various pressure conditions to optimize line visibility, with a high resolution. Line assignments were performed using predictions from the tensorial effective Hamiltonian implemented in the MIRS package, together with a newly developed automated assignment tool, SpectraMatcher, which

SUBMITTER: Ziadi H 

PROVIDER: S-EPMC12655461 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature