1
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Setifi Z, Setifi F, Benmansour S, Liu X, Mague JT, Gómez-García CJ, Konieczny P, Reedijk J. 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)(N 3) 2]. Dalton Trans 2022; 51:5617-5623. [PMID: 35318476 DOI: 10.1039/d2dt00294a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
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 Tc ≈ 8.0-7.0 K for dc fields above 200 mT and a long-range 3D ferromagnetic order at Tc ≈ 4.5 K for dc fields above 400 mT.
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Affiliation(s)
- Zouaoui Setifi
- Laboratoire de Chimie, Ingénierie Moléculaire et Nanostructures (LCIMN), Université Ferhat Abbas Sétif 1, Sétif 19000, Algeria. .,Département de Technologie, Faculté de Technologie, Université 20 Août 1955-Skikda, Skikda 21000, Algeria
| | - Fatima Setifi
- Laboratoire de Chimie, Ingénierie Moléculaire et Nanostructures (LCIMN), Université Ferhat Abbas Sétif 1, Sétif 19000, Algeria.
| | - Samia Benmansour
- Departmento de Química Inorgánica, C/Dr. Moliner, 50, 46100 Burjasot, Valencia, Spain.
| | - Xiangyu Liu
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China.
| | - Joel T Mague
- Department of Chemistry, Tulane University, New Orleans, LA, USA.
| | - Carlos J Gómez-García
- Departmento de Química Inorgánica, C/Dr. Moliner, 50, 46100 Burjasot, Valencia, Spain.
| | - Piotr Konieczny
- Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342 Krakow, Poland.
| | - Jan Reedijk
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands.
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2
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Coexistence of Spin Canting and Metamagnetism in a One-Dimensional Mn(II) Compound Bridged by Alternating Double End-to-End and Double End-On Azido Ligands and the Analog Co(II) Compound. MAGNETOCHEMISTRY 2021. [DOI: 10.3390/magnetochemistry7040050] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Two new compounds of general formula [M(N3)2(dmbpy)] in which dmbpy = 5,5′-dimethyl-2,2′-bipyridine, and M = Mn(II) or Co(II), have been solvothermally synthesized and characterized structurally and magnetically. The structures consist of zig-zag polymeric chains with alternating bis-µ(azide-N1)2M and bis-µ(azide-N1,N3)2M units in which the cis-octahedrally based coordination geometry is completed by the N,N’-chelating ligand dmbpy. The molecular structures are basically the same for each metal. The Mn(II) compound has a slightly different packing mode compared to the Co(II) compound, resulting from their different space groups. Interestingly, relatively weak interchain interactions are present in both compounds and this originates from π–π stacking between the dmbpy rings. The magnetic properties of both compounds have been investigated down to 2 K. The measurements indicate that the manganese compound shows spin-canted antiferromagnetic ordering with a Néel temperature of TN = 3.4 K and further, a field-induced magnetic transition of metamagnetism at temperatures below the TN. This finding affords the first example of an 1D Mn(II) compound with alternating double end-on (EO) and double end-to-end (EE) azido-bridged ligands, showing the coexistence of spin canting and metamagnetism. The cobalt compound shows a weak ferromagnetism resulting from a spin-canted antiferromagnetism and long-range magnetic ordering with a critical temperature, TC = 16.2 K.
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3
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Yue Q, Gao EQ. Azide and carboxylate as simultaneous coupler for magnetic coordination polymers. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2018.12.002] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Wang JY, Yang Q, Zhang YQ, Che GB, Zhao JP, Liu FC. Two isomorphous azide/formate Mn( ii) coordination polymers show spin-canted antiferromagnetism only in the formate system. Inorg Chem Front 2018. [DOI: 10.1039/c7qi00789b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
We reported two isomorphous azide/formate MnII complexes: the azide complex had normal antiferromagnetic coupling, while a canted antiferromagnet with a Néel temperature of TN = 38.5 K was obtained in the formate system.
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Affiliation(s)
- Jiao-Yang Wang
- School of Chemistry and Chemical Engineering
- TKL of Organic Solar Cells and Photochemical Conversion
- Tianjin University of Technology
- Tianjin
- 300384 China
| | - Qian Yang
- School of Science
- Tianjin University of Science & Technology
- Tianjin
- China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- P. R. China
| | - Guang-Bo Che
- Key Laboratory of Preparation of Environmental Friendly
- Jilin Normal University
- Ministry of Education
- Changchun
- China
| | - Jiong-Peng Zhao
- School of Chemistry and Chemical Engineering
- TKL of Organic Solar Cells and Photochemical Conversion
- Tianjin University of Technology
- Tianjin
- 300384 China
| | - Fu-Chen Liu
- School of Chemistry and Chemical Engineering
- TKL of Organic Solar Cells and Photochemical Conversion
- Tianjin University of Technology
- Tianjin
- 300384 China
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