Gas-phase ion—molecule reaction in an RF ion trap. Reactivity of the 5d transition series of metal ions (Lu+, Hf+, Ta+, and W+) with O2
✍ Scribed by Yukari Matsuo; Haruka Maeda; Michio Takami
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 346 KB
- Volume
- 201
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Ions in an externally generated laser plasma of heavy metals have been directly confined in an RF ion trap and subjected to ion-molecule reactions. Trapped metal ions as well as their chemical reaction products have been detected with a quadrupole mass spectrometer. The first four ions of Sd transition series (Lu+, Hft, Ta+, W+ ) are found to be highly reactive with 02: Lu+ and Hf+ form monoxide ions whereas Ta+ and W+ first become monoxides and are stabilized as dioxides, being consistent with the reaction processes observed by a recent FTICR measurement. The determined reaction rate increases with the number of 5d electrons, contrary to the FlICR data for HfC and W+. The influence of insufftcient thermalization of ions on the reaction rates is discussed as a possible origin of this discrepancy.