Scaling-up13C separation by infrared multiphoton dissociation of the CHClF2/Br2 system

Chen, G. C.; Wu, Beimin; Liu, J. L.; Jing, Youliang; Chu, Manman; Xue, Lian; H., P.

doi:10.1007/bf01080939

Cited by 7 publications

(1 citation statement)

References 14 publications

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“…A very large body of experimental and theoretical work on infrared multiphoton dissociation (MPD) has been accomplished since such reactions were first described over 20 years ago. − Of that work, a substantial proportion is concerned with isotope-specific MPD. − Isotopic enrichment in the gas phase of small molecules has been accomplished for sulfur, − oxygen, − hydrogen, − silicon 24 and multiple elements from the same compound. − The most extensive work has been done on carbon isotopes and most often with CO 2 lasers. − Carbon istotopic enrichment has been observed in single-wavelength, single-component reactants, − multiple-wavelength (usually two or more CO 2 laser lines) conditions 28-30 and in two-component, two-step processes. − …”

Section: Introductionmentioning

confidence: 99%

Multiphoton Isotope-Selective Dissociation of Formic Acid Molecules under Action of a Free Electron Laser

et al. 1997

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The infrared multiphoton dissociation (IR MPD) of formic acid molecules (HCOOH → CO + H2O) with free electron laser radiation in the 3 μm region (C−H stretch vibrational absorption band) and in the 6 μm region (CO stretch vibrational absorption band) has been achieved using the same laser. Results indicate that initial excitation of this dimer is more efficient for MPD then initial monomer excitation. Carbon isotope-selective MPD has been performed with an isotopic mixture, H12COOH + H13COOH (50% + 50%), at an irradiating wavelength of 5.56 μm. For this mixture, isotopic selectivity s = k 12/k 13 = 23 has been attained as a ratio of the rate constants of the H12COOH MPD and the H13COOH MPD, respectively. The isotopic selectivity for 13C in the naturally occurring mixture (1.1% of 13C-containing molecules) s = k 13/k 12 = 22 has been attained at an irradiating wavelength of 5.90 μm.

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Section: Introductionmentioning

confidence: 99%

Multiphoton Isotope-Selective Dissociation of Formic Acid Molecules under Action of a Free Electron Laser

et al. 1997

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Mass and Isotope‐Selective Infrared Spectroscopy

Hippler¹,

Miloglyadov²,

Qüack³

et al. 2011

Handbook of High‐resolution Spectroscopy

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Recent advances in laser spectroscopic techniques make it possible to obtain mass‐ and isotope‐selective infrared spectra of gas‐phase species at high resolution and reduced hot‐band spectral congestion. In these techniques, infrared excitation is coupled with ultraviolet multiphoton ionization and detection of the resulting ions in a mass spectrometer, which allows the separation of contributions of different isotopomers and, more generally, species of different mass in a mixture. In combination with jet cooling techniques, spectra are obtained for very cold molecules. These spectra can then be analyzed to extract information on dynamical processes such as intramolecular vibrational redistribution or tunneling and rearrangement processes, and on how intramolecular dynamics is influenced by vibrational excitation and isotope effects. In this review, we introduce isotope‐selective infrared spectroscopic techniques and present some selected applications on isotope effects and intramolecular dynamics of vibrationally excited chloroform, aniline, and benzene obtained by isotope‐selective infrared spectroscopy.

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Dynamics of infrared laser-induced pyrolysis of 1-chloro-1,1-difluoroethane

Jing

et al. 1999

Journal of Analytical and Applied Pyrolysis

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Scaling-up13C separation by infrared multiphoton dissociation of the CHClF2/Br2 system

Cited by 7 publications

References 14 publications

Multiphoton Isotope-Selective Dissociation of Formic Acid Molecules under Action of a Free Electron Laser

Multiphoton Isotope-Selective Dissociation of Formic Acid Molecules under Action of a Free Electron Laser

Mass and Isotope‐Selective Infrared Spectroscopy

Dynamics of infrared laser-induced pyrolysis of 1-chloro-1,1-difluoroethane

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