Applying a novel and universal action spectroscopic technique, called leak-out spectroscopy, this paper revisits the proton shuttle motion of the symmetric linear molecule He-H-He. For this, a 4 K cryogenic ion trap apparatus has been combined with a high-resolution quantum cascade laser operating around 1300 cm. Seven rovibrational lines of this fundamental three-nucleus-four-electron system are recorded, demonstrating the suitability of the leak-out method for such fundamental hydrogen-helium cations.
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| http://dx.doi.org/10.1039/d4cp04767b | DOI Listing |
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High-resolution leak-out spectroscopy of HHe.
Phys Chem Chem Phys
February 2025
I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, D-50937, Köln, Germany.
Applying a novel and universal action spectroscopic technique, called leak-out spectroscopy, this paper revisits the proton shuttle motion of the symmetric linear molecule He-H-He. For this, a 4 K cryogenic ion trap apparatus has been combined with a high-resolution quantum cascade laser operating around 1300 cm. Seven rovibrational lines of this fundamental three-nucleus-four-electron system are recorded, demonstrating the suitability of the leak-out method for such fundamental hydrogen-helium cations.
View Article and Find Full Text PDFHigh Resolution Rovibrational Spectroscopy of the ν and ν + ν Bands of HCCCH.
J Phys Chem A
December 2024
I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany.
Article Synopsis
- The molecular ion HCCCH was studied using a cryogenic ion trap and leak-out spectroscopy at very low temperatures (4 K).
- For the first time, high-resolution measurements were obtained for the fundamental ν band (antisymmetric H-C-H stretch) and the combination band ν + ν (C≡C stretch and CH rock).
- This research, supported by advanced quantum chemical calculations, significantly improved the accuracy of the rotational constant for HCCCH by seventy times compared to previous studies.
Leak-out spectroscopy as alternative method to rare-gas tagging for the Renner-Teller perturbed HCCH and DCCD ions.
Phys Chem Chem Phys
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Radboud University, FELIX Laboratory, Institute for Molecules and Materials, Nijmegen, The Netherlands.
Infrared messenger-tagging predissociation action spectroscopy (IRPD) is a well-established technique to record vibrational spectra of reactive molecular ions. One of its major drawbacks is that the spectrum of the messenger-ion complex is taken instead of that of the bare ion. In particular for small open-shell species, such as the Renner-Teller (RT) affected HCCH and DCCD, the attachment of the tag may have a significant impact on the spectral features.
View Article and Find Full Text PDFIn vivo MR imaging for tumor-associated initial neovascularization by supramolecular contrast agents.
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View Article and Find Full Text PDFHigh-resolution ro-vibrational and rotational spectroscopy of HCO.
Phys Chem Chem Phys
July 2023
I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany.
The ro-vibrational and pure rotational spectra of the linear ion HCO have been investigated in a 4 K cryogenic ion trap instrument. For this, a novel action spectroscopic technique, called leak-out-spectroscopy (LOS, Schmid , 2022, , 8111), has been utilized and characterized. In total, 45 ro-vibrational transitions within the fundamental band of the C-H stretching mode were measured with a band center at 3237.
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