The perpendicular fundamental v5 of chloroform 12CH35Cl3: high resolution infrared study of the v5 band together with the millimetre-wave rotational spectrum

Pietilä, J.; Horneman, V.‐M.; Anttila, R.; Lemoine, B.; Raynaud, Fabrice; Colmont, J.-M.

doi:10.1080/00268970009483321

Cited by 13 publications

(21 citation statements)

References 11 publications

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“…The next object was the lowest parallel fundamental ν 3 around 367 cm −1 (3). The most recent study, as a co-work with the Lille group, has concerned the perpendicular fundamental ν 5 around 776 cm −1 (4). Recently, Colmont et al (5) published an extensive paper concerning the rotational spectra of different isotopic species of chloroform together with a structure evaluation of the molecule.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the fundamental we have measured and analyzed the overtone band 2ν 1 around 5941 cm −1 . The C-H bending is analyzed using the overtone band 2ν 4 . The parallel component (A 1 ) around 2410 cm −1 is relatively strong and at first sight the J structure of the band seemed to be rather regular.…”

Section: Introductionmentioning

confidence: 99%

“…However, when studying the structure in detail, difficulties with resonances were encountered. The perpendicular (E) component of 2ν 4 is much weaker but we were able to assign and analyze it by making use of the results from the parallel component. Accordingly, we have obtained values for α C 4 , α B 4 , and (Cζ ) 4 from the overtone.…”

Section: Introductionmentioning

confidence: 99%

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High-Resolution Infrared Studies of ν1, 2ν1, and 2ν4 Bands of CH35Cl3

Pietilä

Аланко

Horneman

et al. 2002

Journal of Molecular Spectroscopy

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-Resolution Infrared Studies of ν1, 2ν1, and 2ν4 Bands of CH35Cl3

Pietilä

Аланко

Horneman

et al. 2002

Journal of Molecular Spectroscopy

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“…A one-meter-long absorption cell with white, ultra-high molecular weight (UHMW) polyethylene windows was filled with 120 mbar ( rotational and rovibrational spectra reported in Refs. [13] and [14].…”

mentioning

confidence: 99%

“…The pure rotational spectra of the vibronic ground state and of the first excited vibrational levels of the degenerate (e) modes ν 5 [13] and ν 6 [14] of chloroform have been measured previously, and so have rotationally resolved infrared spectra of the fundamental bands of the degenerate modes ν 4 [15] and ν 5 [13]. For the lowest vibrational level ν 6 , the fundamental transition wavenumber was determined from low-resolution infrared [16] and Raman [17,18] spectra to be ∼260 cm −1 (7.80 THz), but none of the infrared and Raman spectroscopic studies [16,17,18] reported so far have provided information on the fundamental bands of the different chlorine isotopomers.…”

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confidence: 99%

Vibrational spectra of chloroform, freon-11 and selected isotopomers in the terahertz region

Haase

Liu

Merkt

2010

Journal of Molecular Spectroscopy

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The fundamental bands of the CCl 3 asymmetric deformation modes of selected isotopomers of chloroform (CHCl 3 ) and freon-11 (CFCl 3 ) have been measured in a static cell at ambient temperature using a laser-based source of tunable radiation in the terahertz region of the electromagnetic spectrum.The analysis of the rotational contours of the bands enabled the derivation of the fundamental frequencies with an accuracy of better than 3 GHz.Keywords: THz spectroscopy, vibrational spectrum Spectroscopy in the terahertz (THz) region of the electromagnetic spectrum (0.1-10 THz) is challenging because the generation and detection of radiation in this region is difficult. Despite recent progress with radiation sources in the THz region, such as backward-wave oscillators (BWO) We report here a measurement of the absorption spectra of 12 CHCl 3 ,13 CHCl 3 , CDCl 3 and CFCl 3 with natural isotopic abundance of chlorine in the region of the ν 6 fundamental band. This mode is of e symmetry for the C 3v isotopomers but splits into two modes, ν 6 (a ′ ) and ν 9 (a ′′ ), in isotopomers of C s symmetry (we follow the usual convention for numbering the normal modes, see p. 25 of Ref.[20]).The experimental setup was identical to the one described in Ref.[11] and was placed under an N 2 -purged plexiglas cage to reduce water absorption.12 CHCl 3 , 13 CHCl 3 , 12 CDCl 3 and 12 CFCl 3 were supplied by Sigma-Aldrich (≥ 99.5% purity) and used without further purification. A one-meter-long absorption cell with white, ultra-high molecular weight (UHMW) polyethylene windows was filled with 120 mbar ( frequencies of the ν 6 (a ′ ) and ν 9 (a ′′ ) modes calculated ab initio also appear degenerate within the expected precision limit of the method used (see Table 1).

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High‐Resolution Fourier Transform Spectrometry of Gases

Guelachvili¹,

Picqué²

2001

Handbook of Vibrational Spectroscopy

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This article mainly focuses on the experimental aspects of high‐resolution Fourier transform spectroscopy (FTS) as applied to molecular gas studies. The main characteristics and peculiarities of Doppler‐limited vibrational spectroscopy of gases and some of the current trends in the technique are discussed using select examples. An introduction to the general appearance of high‐resolution absorption and emission Fourier transform (FT) spectra is given. The specific advantages of the two most common FT recording procedures: the fast‐scanning and the stepping‐mode approaches are discussed. Some of the important scientific results that may be obtained in high‐resolution vibrational spectrometry using FTS are reviewed. Finally, recent developments on selective modulations and time‐resolved FTS are presented. About 300 references (titles included) provide a comprehensive overview of the various aspects of the ongoing applications.

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The perpendicular fundamental v₅ of chloroform ¹²CH³⁵Cl₃: high resolution infrared study of the v₅ band together with the millimetre-wave rotational spectrum

Cited by 13 publications

References 11 publications

High-Resolution Infrared Studies of ν1, 2ν1, and 2ν4 Bands of CH35Cl3

High-Resolution Infrared Studies of ν1, 2ν1, and 2ν4 Bands of CH35Cl3

Vibrational spectra of chloroform, freon-11 and selected isotopomers in the terahertz region

High‐Resolution Fourier Transform Spectrometry of Gases

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