Study of small chlorine‐doped potassium clusters by thermal ionization mass spectrometry |
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Authors: | F M Veljkovi? J B Djustebek M V Veljkovi? A A Peri?‐Gruji? S R Veli?kovi? |
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Institution: | 1. Faculty of Technology and Metallurgy, University of Belgrade, , 11120 Belgrade, Serbia;2. VIN?A Institute of Nuclear Sciences, University of Belgrade, , 11001 Belgrade, Serbia |
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Abstract: | The theoretical calculations have predicted that nonmetal‐doped potassium clusters can be used in the synthesis of a new class of charge‐transfer salts which can be considered as potential building blocks for the assembly of novel nanostructured material. In this work, KnCl (n = 2–6) and KnCln?1 (n = 3 and 4) clusters were produced by vaporization of a solid potassium chloride salt in a thermal ionization mass spectrometry. The ionization energies (IEs) were measured, and found to be 3.64 ± 0.20 eV for K2Cl, 3.67 ± 0.20 eV for K3Cl, 3.62 ± 0.20 eV for K4Cl, 3.57 ± 0.20 eV for K5Cl, 3.69 ± 0.20 eV for K6Cl, 3.71 ± 0.20 eV for K3Cl2 and 3.72 ± 0.20 eV for K4Cl3. The KnCl+ (n = 3–6) clusters were detected for the first time in a cluster beam generated by the thermal ionization source of modified design. Also, this work is the first to report experimentally obtained values of IEs for KnCl+ (n = 3–6) and KnCln?1+ (n = 3 and 4) clusters. The ionization energies for KnCl+ and KnCln?1+ clusters are much lower than the 4.34 eV of the potassium atom; hence, these clusters should be classified as ‘superalkali’ species. Copyright © 2012 John Wiley & Sons, Ltd. |
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Keywords: | KnCl clusters KnCln− 1 clusters ‘ superalkali’ thermal ionization ionization energies |
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