Isotopeneffekte durch Paritätsverletzung in chiralen Molekülen

Berger, Robert; Laubender, Guido; Qüack, Martin; Sieben, Achim; Stohner, Jürgen; Willeke, Martin

doi:10.1002/ange.200462088

Cited by 13 publications

(2 citation statements)

References 35 publications

(38 reference statements)

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“…[40][41][42] In particular, the rovibrational analysis of the 2n 3 mode of CH 35 Cl 37 ClF can make it possible to carry out quasiresonant two photon transitions with a CO 2 laser based on the assignments of the 2n 3 band. [30,43] CDBrClF, the deuterated isotopomer of CHBrClF, is a prototype chiral molecule with asymmetric substitution at the "tetrahedral" carbon [44] with C 1 point group symmetry.…”

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confidence: 99%

High Resolution Rovibrational Spectroscopy of Chiral and Aromatic Compounds

Albert

Qüack

2007

ChemPhysChem

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The analysis of selected rovibrationally resolved infrared spectra of some relatively heavy and large polyatomic molecules is reviewed. A short historical summary of the development of high resolution interferometric Fourier transform infrared (FTIR) spectrometers is given and the possibilities of the currently most highly resolving FTIR spectrometer, which is commercially available in the Bruker IFS 125 series, are discussed. The computational tools necessary to analyse FTIR spectra are described briefly. As examples of rovibrational analysis the spectra of three selected molecules CHCl(2)F, CDBrClF, and pyridine (C(5)H(5)N) are discussed. The spectrum of CHCl(2)F, a fluorochlorohydrocarbon, is of interest for a better understanding of the chemistry of the Earth's atmosphere. CDBrClF is a chiral molecule and therefore the analysis of its rovibrational spectra provides the basis for carrying out further experiments towards the detection of molecular parity violation. The analysis of the pyridine FTIR spectra illustrates the potential of the new generation of FTIR spectrometers in the study of spectra and rovibrational dynamics of aromatic systems and molecules of potential biological interest.

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High Resolution Rovibrational Spectroscopy of Chiral and Aromatic Compounds

Albert

Qüack

2007

ChemPhysChem

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“…Dichloro uoromethane CHCl 2 F has been an asymmetric-top prototype for intramolecular vibrational redistribution for a long time [13][14][15][16]39]. Its isotopomer CH 35 Cl 37 ClF has been prototypical for isotopic chirality and parity violation arising from the fundamentally new isotope e ect related to the di erent weak nuclear charges of 35 Cl and 37 Cl, opening avenues towards the study of fundamental properties of the standard model of particle physics (SMPP) [76][77][78]. For this molecule as well, we have achieved higher resolution than before and low temperatures in the supersonic jet expansion.…”

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confidence: 99%

High-resolution spectroscopic measurements of cold samples in supersonic beams using a QCL dual-comb spectrometer*

et al. 2022

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Optical frequency-comb spectroscopy has proven a very useful tool for high-resolution molecular spectroscopy. Frequency combs based on quantum-cascade lasers (QCL) offer the possibility to easily explore the mid-infrared spectral range (4 µm to 12 µm), but are characterised by large repetition frequencies ( ∼ 10 GHz) which make them seemingly unsuitable for high-resolution spectroscopy.Here, we present techniques to overcome this limitation. We have employed the combined advantages of high temporal and high spectral resolution to measure the infrared (IR) spectra of CF 4 and CHCl 2 F in pulsed, skimmed supersonic beams. The low rotational temperature of the beams and the narrow expansion cone after the skimmer enabled the recording of spectra of cold samples with high resolution. The spectra cover the range from 1200 cm −1 to 1290 cm −1 and the narrowest lines have a full width at half maximum of 15 MHz, limited by the Doppler effect. The results demonstrate the potential of QCL dual-comb spectroscopy for broadband ( > 60 cm −1 ) acquisition of spectra at high spectral (better than 5•10 −4 cm −1 , 15 MHz) and temporal (better than 4 µs) resolution and high sensitivity in the mid-infrared range. The power of the new technology is demonstrated by comparison with previous results for these molecules obtained by FTIR and diode laser spectroscopy.

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M. Quack hält Jost‐Vorlesungen / M. Chisholm in US‐Akademie gewählt / DuPont‐Preise für P. Baran, T. Odom und D. Zhao

2005

Angewandte Chemie

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Isotopeneffekte durch Paritätsverletzung in chiralen Molekülen

Cited by 13 publications

References 35 publications

High Resolution Rovibrational Spectroscopy of Chiral and Aromatic Compounds

High Resolution Rovibrational Spectroscopy of Chiral and Aromatic Compounds

High-resolution spectroscopic measurements of cold samples in supersonic beams using a QCL dual-comb spectrometer*

M. Quack hält Jost‐Vorlesungen / M. Chisholm in US‐Akademie gewählt / DuPont‐Preise für P. Baran, T. Odom und D. Zhao

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