Composition dependence of magnetic relaxation for CoIIxNiII1−x chain-based compounds with mixed double azide–tetrazolate bridges

Min Cheng; You-Song Ding; En-Qing Gao; Zhicheng Zhang; Qin-Xiang Jia

doi:10.1039/C6DT00927A

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Composition dependence of magnetic relaxation for Co ^II_xNi ^II_1−x chain-based compounds with mixed double azide–tetrazolate bridges†

Min Cheng,^a You-Song Ding,^b En-Qing Gao,^c Zhicheng Zhang^a and Qin-Xiang Jia*^a

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* Corresponding authors

^a Department of Chemistry, School of science, Xi'an Jiao Tong University, No.28, Xianning West Road, xi'an, shaan xi, China
E-mail: qinxiangjia1984@mail.xjtu.edu.cn

^b Center for Applied Chemical Research Frontier Institute of Science and Technology, Xi'an Jiaotong University, No.99, Yanxiang Road, xi'an, Shaanxi, China

^c Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, Shanghai 200062, China

Abstract

Seven isomorphous 2D Co^II_xNi^II_1−x (0 ≤ x ≤ 1) compounds based on ferromagnetic chains with mixed double [(μ-EO-N₃)(μ-N–N-tetrazolate)] (EO = end-on) were synthesized and then structurally and magnetically characterized. They are formulated as [Co^II_xNi^II_1−x(L)(N₃)(H₂O)]·H₂O (1–7), (x = 1 (1), 0.86 (2), 0.74 (3), 0.39 (4), 0.14 (5), 0.10 (6), 0 (7); L = 3-(5-tetrazole)-N-oxide-pyridine). Magnetic studies revealed that the homo-metallic compounds (1 and 7) behave as metamagnets, while the hetero-metallic compounds (2–6) show interesting composition-dependent slow relaxation due to the synergy effect of Co^II and Ni^II ions.

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Article information

DOI: https://doi.org/10.1039/C6DT00927A
Article type: Paper
Submitted: 08 Mar 2016
Accepted: 29 Mar 2016
First published: 29 Mar 2016

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Dalton Trans., 2016,45, 8028-8035

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Composition dependence of magnetic relaxation for Co^II_xNi^II_1−x chain-based compounds with mixed double azide–tetrazolate bridges

M. Cheng, Y. Ding, E. Gao, Z. Zhang and Q. Jia, Dalton Trans., 2016, 45, 8028 DOI: 10.1039/C6DT00927A

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Dalton Transactions