A new flowing afterglow-guided ion beam tandem mass spectrometer. Applications to the thermochemistry of polyiodide ions

被引：61

作者：

Do, K ^{[1
]}

Klein, TP ^{[1
]}

Pommerening, CA ^{[1
]}

Sunderlin, LS ^{[1
]}

机构：

[1] NO ILLINOIS UNIV, DEPT CHEM, DE KALB, IL 60115 USA

来源：

JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY | 1997年 / 8卷 / 07期

关键词：

D O I：

10.1016/S1044-0305(97)00116-5

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

A new flowing afterglow-guided ion beam tandem mass spectrometer has been constructed. The tandem mass spectrometer has a linear quadrupole-octopole-quadrupole geometry. The apparatus has been successfully tested or the measurement of reaction rates and endothermic reaction thresholds. The new instrument has been used to determine 0 It bond strengths in two polyiodide ions: D(I-2-I-) = 126 +/- 6 kJ/mol and D(I-2-I-3(-)) = 49 +/- 6 kJ/mol. These values compare well to recent computational results. Electron affinity (EA)(I-3) = 4.15 +/- 0.12 eV can be derived from this work and values in the literature. (C) 1997 American Society for Mass Spectrometry.

引用

页码：688 / 696

页数：9

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[1] DETERMINATION OF ION-LIGAND BOND-ENERGIES AND ION FRAGMENTATION ENERGIES OF ELECTROSPRAY-PRODUCED IONS BY COLLISION-INDUCED DISSOCIATION THRESHOLD MEASUREMENTS [J].