Issue 47, 2021

Synthesis, structures and magnetic properties of dysprosium(iii) complexes based on amino-bis(benzotriazole phenolate) and nitrophenolates: influence over the slow relaxation of the magnetization

Abstract

We report the synthesis and crystal structures of four dysprosium(III) complexes based on the amino-bis(benzotriazole phenolate) ligand (C1NNBiBTP-H2). While a pentagonal bipyramid complex [Dy(C1NNBiBTP-H)Cl2DMF]·THF (1·THF) is obtained in the absence of co-ligands, the association with nitrophenolate derivatives bearing a distinct number and position of nitro groups affords a series of octacoordinated complexes of formulas [Dy(C1NNBiBTP)L1(MeOH)2] (2), [Dy(C1NNBiBTP)L2(MeOH)2] (3) and [Dy(C1NNBiBTP)L3(MeOH)2] (4) (HL1 = 2,4-dinitrophenol; HL2 = 2,4,6-trinitrophenol; HL3 = 2,5-dinitrophenol). Investigations of the magnetic properties reveal that all the complexes exhibit a field-induced slow relaxation of the magnetization, mainly driven by a Raman relaxation. The observed distinct dynamics could be ascribed to the substituents' influence of the nitrophenolate that affects the Dy–O(phenoxide) distance.

Graphical abstract: Synthesis, structures and magnetic properties of dysprosium(iii) complexes based on amino-bis(benzotriazole phenolate) and nitrophenolates: influence over the slow relaxation of the magnetization

Supplementary files

Article information

Article type
Paper
Submitted
12 juil. 2021
Accepted
07 oct. 2021
First published
14 oct. 2021

CrystEngComm, 2021,23, 8343-8350

Synthesis, structures and magnetic properties of dysprosium(III) complexes based on amino-bis(benzotriazole phenolate) and nitrophenolates: influence over the slow relaxation of the magnetization

B. Chen, M. Tsai, Y. Su, P. Lin and J. Long, CrystEngComm, 2021, 23, 8343 DOI: 10.1039/D1CE00909E

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