A Trigonal Prismatic Mononuclear Cobalt(II) Complex Showing Single-Molecule Magnet Behavior

Single-molecule magnets (SMMs) with one transition-metal ion often rely on unusual geometry as a source of magnetically anisotropic ground state. Here we report a cobalt­(II) cage complex with a trigonal prism geometry showing single ion magnet behavior with very high Orbach relaxation barrier of 15...

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Published inJournal of the American Chemical Society Vol. 137; no. 31; pp. 9792 - 9795
Main Authors Novikov, Valentin V, Pavlov, Alexander A, Nelyubina, Yulia V, Boulon, Marie-Emmanuelle, Varzatskii, Oleg A, Voloshin, Yan Z, Winpenny, Richard E.P
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 12.08.2015
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Summary:Single-molecule magnets (SMMs) with one transition-metal ion often rely on unusual geometry as a source of magnetically anisotropic ground state. Here we report a cobalt­(II) cage complex with a trigonal prism geometry showing single ion magnet behavior with very high Orbach relaxation barrier of 152 cm–1. This, to our knowledge, is the largest reported relaxation barrier for a cobalt-based mononuclear SMM. The trigonal prismatic coordination provided by the macrocyclic ligand gives intrinsically more stable molecular species than previously reported SMMs, thus making this type of cage complexes more amendable to possible functionalization that will boost their magnetic anisotropy even further.
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ISSN:0002-7863
1520-5126
DOI:10.1021/jacs.5b05739