Fourier transform synchrotron spectroscopy of torsional and CO-stretching bands of CH317OH

Moruzzi, G.; Murphy, Reba-Jean; Vos, J.; Lees, R. M.; Predoi‐Cross, Adriana; Billinghurst, Brant

doi:10.1016/j.jms.2011.05.007

Cited by 5 publications

(1 citation statement)

References 13 publications

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“…Synchrotron radiation at the CLS Far-Infrared (Far-IR) Beamline was used to record the FTIR spectrum of CH 3 NO 2 in the range 440-510 cm -1 . The Far-IR Beamline and its capability has been previously described [24][25][26][27][28][29][30]. Briefly, synchrotron infrared radiation is collected from the bending magnet via a slotted mirror and focused through a diamond window.…”

Section: Methodsmentioning

confidence: 99%

High-resolution Fourier transform infrared synchrotron spectroscopy of the NO2 in-plane rock band of nitromethane

Dawadi

Twagirayezu

Perry

et al. 2015

Journal of Molecular Spectroscopy

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The high-resolution rotationally resolved Fourier-transform infrared spectrum of the NO 2 inplane rock band (440-510 cm-1) of nitromethane (CH 3 NO 2) has been recorded using the Far-Infrared Beamline at the Canadian Light Source, with a resolution of 0.00096 cm-1. About 1773 transitions reaching the upper state levels have been assigned using an automated ground-state combination difference program together with the traditional Loomis-Wood approach. These data from the lowest torsional state, m = 0, were fit using the six-fold torsion-rotation program developed by Ilyushin et al. [J. Mol. Spectrosc, 259, 26-38 (2010)]. The analysis reveals that the rotational energy level structure in the upper vibrational state is similar to that of the ground vibrational state, but the sign and magnitude of high-order constants are significantly changed suggesting the presence of multiple perturbations.

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Section: Methodsmentioning

confidence: 99%

High-resolution Fourier transform infrared synchrotron spectroscopy of the NO2 in-plane rock band of nitromethane

Dawadi

Twagirayezu

Perry

et al. 2015

Journal of Molecular Spectroscopy

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Assignment of far-infrared laser lines of O-17 methanol by synchrotron FTIR spectroscopy and laser frequency measurements

Lees

Jackson

Moruzzi

et al. 2015

Journal of Molecular Spectroscopy

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Investigation of the rotational spectrum of CH₃ ¹⁷OH and its tentative detection toward Sagittarius B2(N)

Müller,

Ilyushin,

Belloche

et al. 2024

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Methanol is an abundant and widespread molecule in the interstellar medium. The column density of its 18O isotopolog, CH$_3$18OH, is in some star-forming regions so high that the search for CH$_3$17OH is promising. But only very few transition frequencies of CH$_3$17OH with a microwave accuracy have been published prior to our investigation. We want to extend the very limited rotational line list of CH$_3$17OH to be able to search for this isotopolog in the interstellar medium. We recorded the rotational spectrum of CH$_3$17OH between 38 and 1095 GHz employing a methanol sample enriched in 17O to 20<!PCT!>. A torsion-rotation Hamiltonian model based on the rho-axis method was employed to fit the data, as in our previous studies. We searched for rotational transitions of CH$_3$17OH in the imaging spectral line survey ReMoCA obtained with the Atacama Large Millimeter/submillimeter Array (ALMA) toward the high-mass star-forming region Sgr B2(N). The observed spectra were modeled under the assumption of local thermodynamic equilibrium (LTE). The assignments cover $0 J 45$, $K_a 16$, and mainly the $ t = 0$ and 1 torsional states. The Hamiltonian model describes our data well. The model was applied to derive a line list for radio-astronomical observations. We report a tentative detection of CH$_3$17OH along with secure detections of the more abundant isotopologs of methanol toward Sgr B2(N2b). The derived column densities yield isotopic ratios 12C/13C = 25, 16O/18O = 240, and 18O/17O = 3.3, which are consistent with values found earlier for other molecules in Sgr B2. The agreement between the 18O/17O isotopic ratio that we obtained for methanol and the 18O/17O ratios reported in the past for other molecules in Sgr B2(N) strongly supports our tentative interstellar identification of CH$_3$17OH. The accuracy of the derived line list is sufficient for further radio astronomical searches for this methanol isotopolog toward other star-forming regions.

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Fourier transform synchrotron spectroscopy of torsional and CO-stretching bands of CH317OH

Cited by 5 publications

References 13 publications

High-resolution Fourier transform infrared synchrotron spectroscopy of the NO2 in-plane rock band of nitromethane

High-resolution Fourier transform infrared synchrotron spectroscopy of the NO2 in-plane rock band of nitromethane

Assignment of far-infrared laser lines of O-17 methanol by synchrotron FTIR spectroscopy and laser frequency measurements

Investigation of the rotational spectrum of CH₃ ¹⁷OH and its tentative detection toward Sagittarius B2(N)

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Fourier transform synchrotron spectroscopy of torsional and CO-stretching bands of CH317OH

Cited by 5 publications

References 13 publications

High-resolution Fourier transform infrared synchrotron spectroscopy of the NO2 in-plane rock band of nitromethane

High-resolution Fourier transform infrared synchrotron spectroscopy of the NO2 in-plane rock band of nitromethane

Assignment of far-infrared laser lines of O-17 methanol by synchrotron FTIR spectroscopy and laser frequency measurements

Investigation of the rotational spectrum of CH3 17OH and its tentative detection toward Sagittarius B2(N)

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Investigation of the rotational spectrum of CH₃ ¹⁷OH and its tentative detection toward Sagittarius B2(N)