[Eu@Sn6Bi8]4−: A Mini-Fullerane-Type Zintl Anion Containing a Lanthanide Ion


  • This work was supported by the Fonds der Chemischen Industrie FCI (Chemiefonds-Stipendium for F.L.), the Deutsche Forschungsgemeinschaft (DFG), the University of Bordeaux, the Région Aquitaine, GIS Advanced Materials in Aquitaine (COMET Project), and the CNRS. We are grateful to Dr. U. Linne and J. Bamberger for ESI-MS measurements.


original image

La cage aux folles: The [Eu@Sn6Bi8]4− anion (see picture: Sn/Bi blue/orange, Eu black) is the first example of an intermetalloid cluster anion that embeds a lanthanide ion in the solid state. Magnetic measurements and calculations both point to an S=7/2 ground state and indicate ionic interactions of the EuII ion with the main-group-metal cage. ESI mass spectrometry suggest that the cage forms from two seven-atom hemispheres.