The presentation will describe replacing the sodium ion in both the manganese-based and aluminum-based 12-metallacrown-4 molecules using either other alkali metal ions or a series of ammonium-based species. These species were selected since they have the same charge as sodium.  The purpose of replacing the sodium ion with other species is to better understand the role of the sodium ion in determining the single-molecule magnet behavior of these metallacrown complexes.  In these metallacrowns, the sodium ion is bound to the complex opposite of the central lanthanide metal ion.  Since the other alkali metals have similar binding properties, they should also bind to the metallacrown via the ring oxygen atoms. The synthesis of manganese- and aluminum-based 12-MC-4 molecules with various carboxylate anions will also be described.  Any structural changes may lead to different magnetic communication between the ring metal atoms and the central lanthanide atom; thus, the SMM behavior of these molecules may be different than the metallacrowns that have a sodium ion bound to the metallacrown opposite of the lanthanide atom. <br/>

Synthesis and structure of metallacrowns with varying alkali metal substitutions

255th National Meeting (2018)

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