Open AccessA Trigonal Prismatic Mononuclear Cobalt(II) Complex Showing Single-Molecule Magnet Behavior
Author(s) -
Valentin V. Novikov,
Alexander A. Pavlov,
Yulia V. Nelyubina,
MarieEmmanuelle Boulon,
Оleg А. Varzatskii,
Yan Z. Voloshin,
Richard E. P. Winpenny
Publication year - 2015
Publication title -
journal of the american chemical society
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 7.115
H-Index - 612
eISSN - 1520-5126
pISSN - 0002-7863
DOI - 10.1021/jacs.5b05739
Subject(s) - chemistry , trigonal prismatic molecular geometry , cobalt , magnet , trigonal pyramidal molecular geometry , crystallography , relaxation (psychology) , magnetic anisotropy , trigonal crystal system , anisotropy , ground state , coordination geometry , ligand (biochemistry) , molecule , ion , single molecule magnet , magnetic relaxation , nuclear magnetic resonance , atomic physics , inorganic chemistry , magnetic field , magnetization , crystal structure , hydrogen bond , physics , optics , social psychology , psychology , receptor , biochemistry , octahedron , organic chemistry , quantum mechanics
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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