Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 20, Pages 5864-5868Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201411190
Keywords
erbium; magnetic hysteresis; mononuclear; prolate lanthanides; single-molecule magnets
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Funding
- US Department of Energy, Materials Sciences Division [DE-SC0012582]
- EC REA within the Marie Curie International Outgoing Fellowship, project MultiCyChem [PIOF-GA-2011-298569]
- U.S. Department of Energy (DOE) [DE-SC0012582] Funding Source: U.S. Department of Energy (DOE)
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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(SiMe3)(2)}(3)Cl]center dot 2THF, which exhibits slow relaxation of the magnetization under zero dc field with an effective barrier to the reversal of magnetization (Delta 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.
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