期刊
MOLECULAR PHYSICS
卷 113, 期 15-16, 页码 2125-2137出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00268976.2015.1007105
关键词
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资金
- UCL Impact Scheme
- EPSRC [EP/J010839/1, EP/E038522/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J010839/1, EP/E038522/1] Funding Source: researchfish
Collisions between I2+ and CO have been investigated using time-of-flight mass spectrometry at a range of centre-of-mass collision energies between 0.5 and 3.0 eV. Following I2++CO collisions, we detect I++CO+ from a single-electron transfer reaction and IO++C+ from bond-forming reactivity. Reaction-window calculations, based on Landau-Zener theory, have been used to rationalise the electron transfer reactivity and computational chemistry has been used to explore the [I-CO](2+) potential energy surface to account for the observation of IO+. In addition, collisions between I2+ and CS2 have been investigated over a range of centre-of-mass collision energies between 0.8 and 6.0 eV. Both single- and double-electron transfer reactions are observed in the I2+/CS2 collision system, an observation again rationalised by reaction-window theory. The monocations IS+ and IC+ are also detected following collisions of I2+ with CS2, and these ions are clearly products from a bond-forming reaction. We present a simple model based on the structure of the [I-CS2](2+) collision complex to rationalise the significantly larger yield of IS+ than IC+ in this bond-forming process.
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