Synthesis, structure, and magnetic properties of M(N 3) 2(bpy)

Duan Danilović; Youcef Hamida; C. L. Lin; Tan Yuen; Kunhao Li; Jing Li

doi:10.1063/1.3677774

Synthesis, structure, and magnetic properties of M(N ₃) ₂(bpy)

Duan Danilović, Youcef Hamida, C. L. Lin, Tan Yuen, Kunhao Li, Jing Li

Rutgers University

Research output: Contribution to journal › Article

1 Citation (Scopus)

Abstract

Powder crystalline metal-organic frameworks (MOF), M(N ₃) ₂(bpy) (where M Ni, Co, Cu, and bpy 4,4′-bipyridine), were successfully synthesized by mixing M(II) salts with solutions of 4,4′-bipyridine and NaN ₃. All three MOFs crystallize in an orthorhombic crystal system with the space group Cmmm (No. 65), which is isostructural to that of 2D-Fe(N ₃) ₂(bpy). The M(II) ions are coordinated with four azide ligands (N ₃) in equatorial plane forming linear magnetic chains. Isothermal magnetization, magnetic susceptibility, and heat capacity measurements were performed. No clear phase transitions were observed. The intra-chain magnetic interaction was found to be ferromagnetic for the Co and Ni compounds, and antiferromagnetic for the Cu compound. The data were fit to theoretical models, and the variation in the exchange interactions was interpreted in terms of the geometric distortions on the octahedral M(II) sites.

Original language	English
Article number	07E335
Journal	Journal of Applied Physics
Volume	111
Issue number	7
DOIs	https://doi.org/10.1063/1.3677774
Publication status	Published - Apr 1 2012

ASJC Scopus subject areas

Physics and Astronomy(all)

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Danilović, D., Hamida, Y., Lin, C. L., Yuen, T., Li, K., & Li, J. (2012). Synthesis, structure, and magnetic properties of M(N ₃) ₂(bpy). Journal of Applied Physics, 111(7), [07E335]. https://doi.org/10.1063/1.3677774

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title = "Synthesis, structure, and magnetic properties of M(N 3) 2(bpy)",

abstract = "Powder crystalline metal-organic frameworks (MOF), M(N 3) 2(bpy) (where M Ni, Co, Cu, and bpy 4,4′-bipyridine), were successfully synthesized by mixing M(II) salts with solutions of 4,4′-bipyridine and NaN 3. All three MOFs crystallize in an orthorhombic crystal system with the space group Cmmm (No. 65), which is isostructural to that of 2D-Fe(N 3) 2(bpy). The M(II) ions are coordinated with four azide ligands (N 3) in equatorial plane forming linear magnetic chains. Isothermal magnetization, magnetic susceptibility, and heat capacity measurements were performed. No clear phase transitions were observed. The intra-chain magnetic interaction was found to be ferromagnetic for the Co and Ni compounds, and antiferromagnetic for the Cu compound. The data were fit to theoretical models, and the variation in the exchange interactions was interpreted in terms of the geometric distortions on the octahedral M(II) sites.",

author = "Duan Danilovi{\'c} and Youcef Hamida and Lin, {C. L.} and Tan Yuen and Kunhao Li and Jing Li",

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AU - Yuen, Tan

AU - Li, Kunhao

AU - Li, Jing

PY - 2012/4/1

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N2 - Powder crystalline metal-organic frameworks (MOF), M(N 3) 2(bpy) (where M Ni, Co, Cu, and bpy 4,4′-bipyridine), were successfully synthesized by mixing M(II) salts with solutions of 4,4′-bipyridine and NaN 3. All three MOFs crystallize in an orthorhombic crystal system with the space group Cmmm (No. 65), which is isostructural to that of 2D-Fe(N 3) 2(bpy). The M(II) ions are coordinated with four azide ligands (N 3) in equatorial plane forming linear magnetic chains. Isothermal magnetization, magnetic susceptibility, and heat capacity measurements were performed. No clear phase transitions were observed. The intra-chain magnetic interaction was found to be ferromagnetic for the Co and Ni compounds, and antiferromagnetic for the Cu compound. The data were fit to theoretical models, and the variation in the exchange interactions was interpreted in terms of the geometric distortions on the octahedral M(II) sites.

AB - Powder crystalline metal-organic frameworks (MOF), M(N 3) 2(bpy) (where M Ni, Co, Cu, and bpy 4,4′-bipyridine), were successfully synthesized by mixing M(II) salts with solutions of 4,4′-bipyridine and NaN 3. All three MOFs crystallize in an orthorhombic crystal system with the space group Cmmm (No. 65), which is isostructural to that of 2D-Fe(N 3) 2(bpy). The M(II) ions are coordinated with four azide ligands (N 3) in equatorial plane forming linear magnetic chains. Isothermal magnetization, magnetic susceptibility, and heat capacity measurements were performed. No clear phase transitions were observed. The intra-chain magnetic interaction was found to be ferromagnetic for the Co and Ni compounds, and antiferromagnetic for the Cu compound. The data were fit to theoretical models, and the variation in the exchange interactions was interpreted in terms of the geometric distortions on the octahedral M(II) sites.

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