4.8 Article

Slow Magnetic Relaxation and Single-Molecule Toroidal Behaviour in a Family of Heptanuclear {Cr(III)Ln(6)(III)} (Ln=Tb, Ho, Er) Complexes

期刊

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 3, 页码 779-784

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201711844

关键词

chromium; clusters; dipolar coupling; lanthanides; single-molecule magnets

资金

  1. Australian Research Council (ARC)
  2. DST-SERB [EMR/2014/00024]
  3. Australia-India AISRF fund
  4. IITB-Monash Research Academy

向作者/读者索取更多资源

The synthesis, magnetic properties, and theoretical studies of three heterometallic {Cr(III)Ln(6) (III)} (Ln=Tb, Ho, Er) complexes, each containing a metal topology consisting of two Ln(3) triangles connected via a Cr-III linker, are reported. The {CrTb6} and {CrEr6} analogues display slow relaxation of magnetization in a 3000Oe static magnetic field. Single-crystal measurements reveal opening up of the hysteresis loop for {CrTb6} and {CrHo6} molecules at low temperatures. Abinitio calculations predict toroidal magnetic moments in the two Ln(3) triangles, which are found to couple, stabilizing a con-rotating ferrotoroidal ground state in Tb and Ho examples and extend the possibility of observing toroidal behaviour in non Dy-III complexes for the first time.

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