Issue 15, 2018

Synthesis, structure and magnetic properties of tris(pyrazolyl)methane lanthanide complexes: effect of the anion on the slow relaxation of magnetization

Abstract

We report on the synthesis, structure and investigation of magnetic properties of a series of six heteroleptic complexes of the general formula [Ln(Tpm)X3yMeCN (Tpm = tris(3,5-dimethylpyrazolyl)methane; Ln = Tb, Dy, Er; X = NO3, Cl and y = 1 or 2). We demonstrate that the observation of a field-induced slow relaxation of magnetization is highly dependent on the anion's nature. While nitrate moieties appear to be suitable to stabilize the oblate electronic density of Dy3+, chloride ions generate an equatorial crystal-field allowing the slow relaxation of the prolate Er3+ ions.

Graphical abstract: Synthesis, structure and magnetic properties of tris(pyrazolyl)methane lanthanide complexes: effect of the anion on the slow relaxation of magnetization

Supplementary files

Article information

Article type
Communication
Submitted
02 Feb 2018
Accepted
01 Mar 2018
First published
02 Mar 2018

Dalton Trans., 2018,47, 5153-5156

Synthesis, structure and magnetic properties of tris(pyrazolyl)methane lanthanide complexes: effect of the anion on the slow relaxation of magnetization

J. Long, D. M. Lyubov, T. V. Mahrova, A. V. Cherkasov, G. K. Fukin, Y. Guari, J. Larionova and A. A. Trifonov, Dalton Trans., 2018, 47, 5153 DOI: 10.1039/C8DT00458G

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