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Titolo:
Binding energies of alkali metal halide cluster ions: calculated by electrostatic models and measured by the kinetic method
Autore:
Wang, G; Cole, RB;
Indirizzi:
Xavier Univ, Dept Chem, New Orleans, LA 70125 USA Xavier Univ New OrleansLA USA 70125 Dept Chem, New Orleans, LA 70125 USA Univ New Orleans, Dept Chem, New Orleans, LA 70148 USA Univ New Orleans New Orleans LA USA 70148 Chem, New Orleans, LA 70148 USA
Titolo Testata:
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
fascicolo: 1-3, volume: 108, anno: 2000,
pagine: 153 - 162
SICI:
0368-2048(200007)108:1-3<153:BEOAMH>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
THERMOCHEMICAL DETERMINATIONS; MOLECULES;
Keywords:
bond dissociation energy; kinetic method; cluster ions; rigid-ion model; polarizable ion model;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Wang, G Xavier Univ, Dept Chem, 7325 Palmetto St, New Orleans, LA 70125 USA Xavier Univ 7325 Palmetto St New Orleans LA USA 70125 LA 70125 USA
Citazione:
G. Wang e R.B. Cole, "Binding energies of alkali metal halide cluster ions: calculated by electrostatic models and measured by the kinetic method", J ELEC SPEC, 108(1-3), 2000, pp. 153-162

Abstract

Experimental measurement of the binding energy of gaseous alkali halide clusters has been difficult. Recently, Chen and Cooks (J. Mass Spectrom. 1997;32:1258) reported the application of the kinetic method to the measurementof relative bond dissociation energies via competitive fragmentation of mixed ionic clusters [M1XM2](+) generated in a mass spectrometer. In this study the binding energies of various alkali metal halide cluster ions of the form [M1XM2](+) or [X1MX2](-) have been calculated using both the rigid-ionmodel and the polarizable-ion model. The kinetic method was employed to measure the dissociation energies of triatomic cluster ions consisting of different alkali metal ions and halides. Good correlations between the calculated and measured differences in competitive dissociation energies were found for both positively and negatively charged cluster ions. Results further demonstrate the applicability of the kinetic method to measuring the relative bond dissociation energies for ionic compounds. However, it is noted that the kinetic method does not measure the absolute bond dissociation energybetween a cation and an anion in the initial state of the tri-atomic cluster ion. (C) 2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 15/07/20 alle ore 20:25:59