Isomer separation of iron oxide cluster cations by ion mobility mass spectrometry

Keijiro Ohshimo, Tatsuya Komukai, Ryoichi Moriyama, Fuminori Misaizu

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51 Citations (Scopus)


Geometrical structures of iron oxide cluster cations have been analyzed by ion mobility mass spectrometry. The series of (FeO)n+ and FenOn + 1+ cluster cations were predominantly observed in a mass spectrum at high ion-injection energy into a drift cell. Arrival time distributions in the ion mobility spectrometry indicate that two structural isomers coexist for the (FeO)n+ clusters at n ¥ 5. By comparison of experimental collision cross sections determined from the arrival times with theoretical ones, two-dimensional ring and sheet structures were assignable for (FeO)n+ (n = 3-8). In addition to these isomers, compact three-dimensional structures were also found to be stable at (FeO)n+ (n 6). Thus, the two-dimensional and three-dimensional structural isomers coexist for (FeO)n + (n = 6-8).

Original languageEnglish
Pages (from-to)3899-3905
Number of pages7
JournalJournal of Physical Chemistry A
Issue number22
Publication statusPublished - 2014 Jun 5


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