A rare example of a double metamagnetic transition leading to 2D and 3D long-range order in the two-dimensional pyrazine- and azido-bridged cobalt(ii) compound [Co(pyz)(N3)2]

Setifi, Z.; Setifi, F.; Benmansour, S.; Liu, X.; Mague, J.T.; Gómez-García, C.J.; Konieczny, P.; Reedijk, J.

doi:doi:10.1039/d2dt00294a

Setifi, Z.; Setifi, F.; Benmansour, S.; Liu, X.; Mague, J.T.; Gómez-García, C.J.; ... ; Reedijk, J. (2022)

A rare example of a double metamagnetic transition leading to 2D and 3D long-range order in the two-dimensional pyrazine- and azido-bridged cobalt(ii) compound [Co(pyz)(N3)2]

The synthesis, characterization, crystal structure and detailed magnetic properties of a pyrazine (pyz) and azido (N₃) bridged cobalt(II) compound of formula [Co(N₃)₂(pyz)] (1) are reported. Compound 1 shows a layered structure formed by Co(II) chains with double μ-N₃(κN¹,N¹) bridges that are further connected by μ-(pyrazine-κN¹,N⁴) bridges. The layers present weak van der Waals interactions between azido terminal groups. The magnetic properties show the presence of a metamagnetic behaviour in 1 with two critical fields of 200 and 400 mT at low temperatures. AC magnetic measurements show the presence of a long-range 2D ferromagnetic order at T_c ≈ 8.0-7.0 K for dc fields above 200 mT and a long-range 3D ferromagnetic order at T_c ≈ 4.5 K for dc fields above 400 mT.

All authors: Setifi, Z.; Setifi, F.; Benmansour, S.; Liu, X.; Mague, J.T.; Gómez-García, C.J.; Konieczny, P.; Reedijk, J.

Date: 2022-04-05

Journal: Dalton Transactions

Volume: 51

Issue: 14

Pages: 5617 - 5623

DOI: doi:10.1039/d2dt00294a

Leiden University Scholarly Publications

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A rare example of a double metamagnetic transition leading to 2D and 3D long-range order in the two-dimensional pyrazine- and azido-bridged cobalt(ii) compound [Co(pyz)(N3)2]