Eur. Phys. J. D 52, 59-62 (2009)
https://doi.org/10.1140/epjd/e2008-00268-x

Isomer-selected photoreactions of gas-phase cluster ions

Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578, Japan

Corresponding author: ^a misaizu@mail.tains.tohoku.ac.jp

Received: 19 September 2008
Published online: 24 January 2009

Abstract

We have developed an apparatus for investigating isomer-selected photodissociation reactions by ion mobility spectrometry coupled with time-of-flight mass spectrometry. By using this apparatus we optimized ion intensities under isomer-separation condition for carbon cluster ions. Among ions having linear and cyclic isomers, we demonstrated dissociation of isomer-selected C₉⁺ ion at 355-nm photon irradiation. As a result we observed marked difference in the dissociation pathways between from linear isomer and from cyclic isomer. For the purpose of adopting this technique to metal-ligand cluster ions, we also investigated mobility spectrometry of vanadium metal ions with Ar, in addition to electronic state separation for free atomic ions.