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 7 2021
Accepted
07 10 2021
First published
14 10 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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