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Issue 16, 2002
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A first glimpse at the acidic proton vibrations in HCl–water clusters via supersonic jet FTIR spectroscopy

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Abstract

The first mid-IR spectra of the proton vibrational dynamics in isolated HCl–water clusters are presented. Pulsed expansions of HCl and water in rare gases through a slit nozzle are probed by an FTIR spectrometer in the 2000–3300 cm−1 range. Distinct absorptions by small HCl and HCl–water clusters are superimposed on broad bands, partly due to electrolytically dissociated HCl. A firm assignment of the 1 : 1 complex (at 2723.5 cm−1) is provided together with a more tentative assignment of the 1 : 2 complex (near 2464 cm−1). The results are compared to condensed phase, matrix isolation and theoretical studies as well as exploratory quantum-chemical calculations. A rationale for the low abundance of small molecular HCl–water clusters beyond the 1 : 1 complex is given.

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Publication details

The article was received on 20 May 2002, accepted on 27 Jun 2002 and first published on 15 Jul 2002


Article type: Communication
DOI: 10.1039/B204840J
Citation: Phys. Chem. Chem. Phys., 2002,4, 3933-3937

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    A first glimpse at the acidic proton vibrations in HCl–water clusters via supersonic jet FTIR spectroscopy

    M. Weimann, M. Fárník and M. A. Suhm, Phys. Chem. Chem. Phys., 2002, 4, 3933
    DOI: 10.1039/B204840J

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