Single-molecule magnet behavior for an antiferromagnetically superexchange-coupled dinuclear dysprosium(III) Complex

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DOIResolve DOI: http://doi.org/10.1021/ja109706y
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TypeArticle
Journal titleJournal of the American Chemical Society
Volume133
Issue14
Pages53195328; # of pages: 10
AbstractA family of five dinuclear lanthanide complexes has been synthesized with general formula [LnIII2(valdien)2(NO3)2] where (H2valdien = N1,N3-bis(3-methoxysalicylidene)diethylenetriamine) and LnIII = EuIII1, GdIII2, TbIII3, DyIII4, and HoIII5. The magnetic investigations reveal that 4 exhibits single-molecule magnet (SMM) behavior with an anisotropic barrier Ueff = 76 K. The step-like features in the hysteresis loops observed for 4 reveal an antiferromagnetic exchange coupling between the two dysprosium ions. Ab initio calculations confirm the weak antiferromagnetic interaction with an exchange constant JDy−Dy = −0.21 cm−1. The observed steps in the hysteresis loops correspond to a weakly coupled system similar to exchange-biased SMMs. The Dy2 complex is an ideal candidate for the elucidation of slow relaxation of the magnetization mechanism seen in lanthanide systems.
Publication date
LanguageEnglish
AffiliationNRC Steacie Institute for Molecular Sciences; National Research Council Canada
Peer reviewedYes
NPARC number19727342
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Record identifier60293498-69d5-462e-9628-1877529522f7
Record created2012-03-29
Record modified2016-05-09
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