Compositions and Structures of Vanadium Oxide Cluster Ions VmOn± (m = 2-20) Investigated by Ion Mobility Mass Spectrometry

Jenna W.J. Wu, Ryoichi Moriyama, Hiroshi Tahara, Keijiro Ohshimo, Fuminori Misaizu

研究成果: Article査読

25 被引用数 (Scopus)


Stable compositions and geometrical structures of vanadium oxide cluster ions, VmOn±, were investigated by ion mobility mass spectrometry (IM-MS). The most stable compositions of vanadium oxide cluster cations were (V2O4)(V2O5)(m-2)/2+ and (VO2)(V2O5)(m-1)/2+, depending on the clusters with even and odd numbers of vanadium atoms. Compositions one-oxygen richer than the cations, such as (V2O5)m/2- and (VO3)(V2O5)(m-1)/2-, were predominantly observed for cluster anions. Assignments of these stable cluster ion compositions, which were determined as a result of collision-induced dissociations in IM-MS, can partly be explained with consideration of spin density distribution. By comparing the experimental collision cross sections (CCSs) obtained from ion mobility measurement with CCSs of the theoretically calculated structures, we confirmed the patterned growth of geometrical structures partially discussed in previous theoretical and spectroscopic studies. We showed that even sized (V2O5)m/2± where m = 6-12 had right polygonal prism structures except for the anionic V12O30-, and for the clusters of odd numbers of vanadium m, cations and anions can either have bridged or pyramid structures. Both of the odd sized structures proposed were derivatives from the even sized right polygonal prism structures. The exception, V12O30-, which had a CCS almost equal to that of the neighboring smaller V11O28-, should have a structure of higher density than the right hexagonal prism, in which it was proposed to be a captured pyramid structure, derived from V11O28-.

ジャーナルJournal of Physical Chemistry A
出版ステータスPublished - 2016 6月 2

ASJC Scopus subject areas

  • 物理化学および理論化学


「Compositions and Structures of Vanadium Oxide Cluster Ions VmOn± (m = 2-20) Investigated by Ion Mobility Mass Spectrometry」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。