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A 3D Cu(ii) tetrazolate coordination polymer based on pentanuclear units with a large coercive field

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Abstract

A novel 3D coordination polymer {[Cu4.5 (BTZE)1.53-OH)3(μ-OH)(SO4)(H2O)1.5·4H2O]}n (1) was synthesized by a solvothermal reaction of 1,2-bis(tetrazol-5-yl) ethane (BTZE) with copper sulfate. Compound (1) contained triangular [Cu33-OH)] cluster based magnetic Δ-chains linked with in situ generated μ2-BTZE ligands to form a 2D cyclic annular layer. This 2D layer structure was further modified with sulfate and symmetry-related μ3-OH groups, extending to a 3D coordination framework structure. The magnetic performance of (1) was characterized in the temperature range of 2–300 K in terms of direct-current and alternating-current magnetic susceptibilities, revealing that (1) was a canted ferromagnet with a critical temperature (Tc) of 9.5 K. Notably, (1) behaved as a hard magnet with a coercive field of 2.3 kOe at 2 K, showing significant unique characteristics compared to those of the reported spin canting systems based on pure Cu(II) ions.

Graphical abstract: A 3D Cu(ii) tetrazolate coordination polymer based on pentanuclear units with a large coercive field

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Supplementary files

Article information


Submitted
21 Oct 2019
Accepted
28 Nov 2019
First published
28 Nov 2019

Dalton Trans., 2020, Advance Article
Article type
Paper

A 3D Cu(II) tetrazolate coordination polymer based on pentanuclear units with a large coercive field

W. Sun, L. Li, X. Liu, S. Liu, C. Ke, Q. Zhang and X. Zhang, Dalton Trans., 2020, Advance Article , DOI: 10.1039/C9DT04113C

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