Phthalocyanine supported dinuclear Ln(III) complexes: the solvent-induced change of magnetic properties in dysprosium(iii) analogues.

Author(s) Ge, J.Y.; Wang, H.Y.; Li, J.; Xie, J.Z.; Song, Y.; Zuo, J.L.
Journal Dalton Trans
Date Published 2017 Mar 07
Abstract

Three dinuclear lanthanide complexes, [Ln2(thd)4Pc]·2C6H6 (Hthd = 2,2,6,6-tetramethylheptanedione, Ln = Sm (1), Tb (2), Dy (3)), have been synthesized based on phthalocyanine (Pc). They can be reversibly transformed into [Ln2(thd)4Pc] (Ln = Sm (1'), Tb (2'), Dy (3')) via desolvation and resolvation of the lattice benzene molecules. This change generates dramatic influences on the structural and magnetic properties of the dysprosium analogue. In complex 3, one crystallographically independent metal center is observed, and it exhibits a single relaxation process of magnetization with an energy barrier of 55.7 K. Upon desolvation, the resulting complex 3' contains two types of metal centers, and shows the field-induced single-molecule magnetic behavior with two thermally activated magnetic relaxation processes. The anisotropy barriers for 3' are as high as 63.3 K and 109.6 K, respectively. This work confirms that the solvated molecules can finely tune the magnetic relaxation mechanisms.

DOI 10.1039/c7dt00298j
ISSN 1477-9234
Citation Ge J-, Wang H-, Li J, Xie J-, Song Y, Zuo J-. Phthalocyanine supported dinuclear Ln(III) complexes: the solvent-induced change of magnetic properties in dysprosium(iii) analogues. Dalton Trans. 2017;46(10):3353-3362.

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