High resolution synchrotron-based study and analysis of the ν14 band of thiophene

High-resolution synchrotron far-infrared spectroscopy of acrolein: The vibrational levels below 700cm−1

“…At CLS, we have been working to minimize the detrimental effects of source noise (arising mostly from mechanical vibrations in the beamline optics) in order to realize the full brightness advantage of synchrotron radiation. This advantage was first achieved around 500 cm À1 [17], and now extends over a wider range from approximately 120-900 cm À1 [18,25].…”

High-resolution synchrotron infrared spectroscopy of thiophosgene: The ν2 and ν4 fundamental bands near 500 cm−1

“…More recently there have been promising demonstrations that the brightness of synchrotron sources is useful for gas-phase studies with high spectral resolution, particularly in the far-infrared region [13][14][15][16]. At the CLS, the far-infrared beamline has already been used for detailed studies of a number of molecules, including acrolein [17][18][19], thiophene [20], pyrrole [21], b-propiolactone [22], methyl silane [23], and methanol [24]. The excellent spectral resolution achieved in these studies (often <0.001 cm…”

Rovibrational spectrum and analysis of the ν8 band of thiophene using infrared synchrotron radiation

“…2. Using the ground state parameters from our previous analysis of the m 14 band of thiophene [5] as an approximation of the rotational spacing in both the ground and m 8 excited vibrational states, the rovibrational spectrum of the m 8 band was calculated and compared with the experimental spectrum. The excited state rotational constants were then adjusted until the patterns were similar.…”

“…In 1993, the m 13 band at 712.1 cm À1 was studied with tunable diode lasers and FTIR spectroscopy (at a resolution of 0.0022 cm À1 ) by Pankoke et al [4]. No further rotationally-resolved work was reported until 2008, when we recorded spectra of the ring puckering mode (m 14 ) using the far infrared beamline at the Canadian Light Source (CLS) [5]. Our rovibrational analysis of this lowest frequency band at 452.4 cm À1 involved the assignment of 2878 transitions from a spectrum collected with 0.00096 cm À1 resolution.…”