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Issue 15, 2014
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A size resolved investigation of large water clusters

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Abstract

Size selected water clusters are generated by photoionizing sodium doped clusters close to the ionization threshold. This procedure is free of fragmentation. Upon infrared excitation, size- and isomer-specific OH-stretch spectra are obtained over a large range of cluster sizes. In one application of this method the infrared spectra of single water cluster sizes are investigated. A comparison with calculations, based on structures optimized by genetic algorithms, has been made to tentatively derive cluster structures which reproduce the experimental spectra. We identified a single all-surface structure for n = 25 and mixtures with one or two interior molecules for n = 24 and 32. In another application the sizes are determined at which the crystallization sets in. Surprisingly, this process strongly depends on the cluster temperature. The crystallization starts at sizes below n = 200 at higher temperatures and the onset is shifted to sizes above n = 400 at lower temperatures.

Graphical abstract: A size resolved investigation of large water clusters

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Publication details

The article was received on 09 Dec 2013, accepted on 17 Feb 2014 and first published on 17 Feb 2014


Article type: Perspective
DOI: 10.1039/C3CP55185G
Citation: Phys. Chem. Chem. Phys., 2014,16, 6859-6871
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    A size resolved investigation of large water clusters

    U. Buck, C. C. Pradzynski, T. Zeuch, J. M. Dieterich and B. Hartke, Phys. Chem. Chem. Phys., 2014, 16, 6859
    DOI: 10.1039/C3CP55185G

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