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Slow magnetic relaxation in the O-Se-O bridged manganese(III) Schiff base complexes

Abstract

Two new chain complexes consisting of Mn(salen) building block bridged by O-Se-O units, [Mn2(salen)2(L)](ClO4) (1) and {[Mn(salen)]2(L)2}•Y (2) (salen = N,N'-bis(salicylidene)-ethylenediamine, L = 3,4,5-trifluorobenzeneseleninic acid, Y = salicylaldehyde) have been synthesized and characterized structurally and magnetically. In the two complexes above, the 3,4,5-trifluorobenzeneseleninic acid ligand adopt syn–anti bridging coordination mode and all the MnIII ions show distorted octahedral geometry. In complex 1, the [Mn2(salen)2]2+ dimers are connected alternatively by the bridging ligands into an infinite zigzag chain, while the [Mn(salen)]+ monomers are connected alternatively in complex 2. The magnetic measurements reveal that both complexes exhibit slow magnetic relaxation behaviours with effective energy barrier Ueff = 31.2 K for 1 and Ueff = 35.1 K for 2, respectively. These compounds are rare examples of a small number of aromatic selenite based magnetic materials.

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Supplementary files

Article information


Submitted
22 Nov 2019
Accepted
13 Jan 2020
First published
13 Jan 2020

New J. Chem., 2020, Accepted Manuscript
Article type
Paper

Slow magnetic relaxation in the O-Se-O bridged manganese(III) Schiff base complexes

S. Zhang, S. Li, S. Zeng, Y. Shi, D. Wang and L. Chen, New J. Chem., 2020, Accepted Manuscript , DOI: 10.1039/C9NJ05837K

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