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A Trigonal‐Pyramidal Erbium(III) Single‐Molecule Magnet
Author(s) -
Brown Andrew J.,
Pinkowicz Dawid,
Saber Mohamed R.,
Dunbar Kim R.
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201411190
Subject(s) - lanthanide , single molecule magnet , magnet , magnetization , chemistry , relaxation (psychology) , prolate spheroid , molecule , condensed matter physics , crystallography , magnetic field , ion , physics , social psychology , psychology , organic chemistry , quantum mechanics , classical mechanics
Given the recent advent of mononuclear single‐molecule magnets (SMMs), a rational approach based on lanthanides with axially elongated f‐electron charge cloud (prolate) has only recently received attention. We report herein a new SMM, [Li(THF) 4 [Er{N(SiMe 3 ) 2 } 3 Cl]⋅2 THF, which exhibits slow relaxation of the magnetization under zero dc field with an effective barrier to the reversal of magnetization (Δ E eff / k B =63.3 K) and magnetic hysteresis up to 3 K at a magnetic field sweep rate of 34.6 Oe s −1 . This work questions the theory that oblate or prolate lanthanides must be stabilized with the appropriate ligand framework in order for SMM behavior to be favored.