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Letzner M, Gruen S, Habig D, et al. High resolution spectroscopy of HCl-water clusters: IR bands of undissociated and dissociated clusters revisited. J Chem Phys. 2013;139(15):154304doi: 10.1063/1.4824858.
Letzner, M., Gruen, S., Habig, D., Hanke, K., Endres, T., Nieto, P., Schwaab, G., Walewski, �. �., Wollenhaupt, M., Forbert, H., Marx, D., & Havenith, M. (2013). High resolution spectroscopy of HCl-water clusters: IR bands of undissociated and dissociated clusters revisited. The Journal of chemical physics, 139(15), 154304. https://doi.org/10.1063/1.4824858
Letzner, Melanie, et al. "High resolution spectroscopy of HCl-water clusters: IR bands of undissociated and dissociated clusters revisited." The Journal of chemical physics vol. 139,15 (2013): 154304. doi: https://doi.org/10.1063/1.4824858
Letzner M, Gruen S, Habig D, Hanke K, Endres T, Nieto P, Schwaab G, Walewski Ł, Wollenhaupt M, Forbert H, Marx D, Havenith M. High resolution spectroscopy of HCl-water clusters: IR bands of undissociated and dissociated clusters revisited. J Chem Phys. 2013 Oct 21;139(15):154304. doi: 10.1063/1.4824858. PMID: 24160510.
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J Chem Phys. 2013 Oct 21;139(15):154304. doi: 10.1063/1.4824858.

High resolution spectroscopy of HCl-water clusters: IR bands of undissociated and dissociated clusters revisited.

The Journal of chemical physics

Melanie Letzner, Sarah Gruen, Daniel Habig, Kenny Hanke, Torsten Endres, Pablo Nieto, Gerhard Schwaab, Łukasz Walewski, Miriam Wollenhaupt, Harald Forbert, Dominik Marx, Martina Havenith

Affiliations

  1. Lehrstuhl für Physikalische Chemie II, Ruhr-Universität Bochum, 44780 Bochum, Germany.

PMID: 24160510 DOI: 10.1063/1.4824858

Abstract

We report a detailed study on the IR spectroscopy of HCl-water complexes in superfluid helium nanodroplets in the frequency range from 2660 to 2675 cm(-1). We have recorded spectra of HCl-H2(16)O as well as of HCl-H2(18)O complexes and compared these results with theoretical predictions. In addition, we have carried out mass-selective intensity measurements as a function of partial pressure of HCl as well as of H2(18)O (pick-up curves). The results support a scenario where the IR-absorption in this part of the spectrum contains contributions from undissociated as well as from dissociated clusters with Cl(-)(H2O)3(H3O)(+) being the smallest dissociated complex. These findings are corroborated by additional electric field measurements yielding the orientation of the vibrational transition moment with respect to the permanent dipole moment. As a result we are able to assign a broad absorption band starting at 2675 cm(-1) to dissociated HCl-water clusters (HCl)1(H2O)n with n ≥ 4. The two narrow absorption lines at 2667.9 cm(-1) and 2670 cm(-1) are assigned to an undissociated cluster, in agreement with previous studies.

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