期刊
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
卷 279, 期 1, 页码 5-9出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijms.2008.09.001
关键词
Molecular clusters; Black-body radiation; FT-ICR mass spectrometry; Intracluster reactions
资金
- Deutsche Forschungsgemeinschaft
- Fonds der Chemischen Industrie
- European Union in the Research Training Network
- Bruker Daltonics
A novel design for a temperature-controlled ICR cell is described for use in black-body infrared radiative dissociation (BIRD) Studies of weakly bound systems like water clusters. Due to several improved design features, it provides a very uniform black-body radiation environment, and at the same time maintains efficient pumping for a low collision rate oil the order of 10(-2) s(-1). At the lowest temperatures reached, nominally 89 K cell plate temperature, water evaporation effectively ceases, while intracluster reactions in V+(H2O), with a small activation energy are still observed. BIRD rate constants for Ag+(H2O)(n), n = 4-6, are shown in the temperature range T = 160-320 K. For n = 6, a linear Arrhenius plot with R-2 = 0.9943 is obtained without any calibration, confirming the suitability of the cell for quantitative BIRD studies. (C) 2008 Elsevier B.V. All rights reserved.
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