Two-dimensional Co–Ln networks bridged by phenyl pyrimidyl substituted nitronyl nitroxides: structural and magnetic properties

2018 ◽  
Vol 47 (13) ◽  
pp. 4672-4677 ◽  
Author(s):  
Guifang Sun ◽  
Jianni Guo ◽  
Meng Yang ◽  
Lu Xi ◽  
Licun Li ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Two Dimensional ◽  
Nitronyl Nitroxide ◽  
Nitronyl Nitroxides ◽  
Structural And Magnetic Properties

Two novel 2D Co–Ln complexes have been obtained, which represent the first examples of nitronyl nitroxide bridged 2D Co–Ln complexes.

scholarly journals Two-Dimensional Nitronyl Nitroxide–Cu Networks Based on Multi-Dentate Nitronyl Nitroxides: Structures and Magnetic Properties

2021 ◽  
Vol 7 (5) ◽  
pp. 73
Author(s):  
Hongdao Li ◽  
Jiao Lu ◽  
Jing Xie ◽  
Pei Jing ◽  
Licun Li
Keyword(s):  
Magnetic Properties ◽  
Pyridine Ring ◽  
Layer Structure ◽  
Magnetic Behavior ◽  
Antiferromagnetic Coupling ◽  
Two Dimensional ◽  
Nitronyl Nitroxide ◽  
Ferromagnetic Interaction ◽  
Tetradentate Ligands ◽  
Nitronyl Nitroxides

Two multi-dentate nitronyl nitroxide radicals, namely, bisNITPhPy ([5-(4-pyridyl)-1,3-bis(1′-oxyl-3′-oxido-4′,4′,5′,5′-tetramethyl-4,5-hydro-1H-imidazol-2-yl)]benzene) and NIT-3Py-5-4Py (2-{3-[5-(4-pyridyl)]pyridyl}-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide), were assembled with CuII ions to obtain two-dimensional heterospin 2p–3d coordination polymers [Cu7(hfac)14(bisNITPhPy)2]n (1) and [Cu2(hfac)4(NIT-3Py-5-4Py)]n (2) (hfac: hexafluoroacetylacetonate). In both compounds, the bisNITPhPy and NIT-3Py-5-3Py radicals acted as pentadentate and tetradentate ligands, respectively, to connect with CuII ions, generating a 2D layer structure. The analysis of the magnetic behavior indicated that strong antiferromagnetic coupling and ferromagnetic interaction (J = 17.1 cm−1) coexisted in 1. For 2, there were ferromagnetic couplings between the CuII ion and NO group, as well as the CuII ion and radical via the pyridine ring with J1 = 32.8 and J2 = 2.2 cm−1, respectively.

Structural and magnetic properties of Mn(SCN)2(C2H5OH)2, a new two-dimensional Heisenberg magnet

1979 ◽  
Vol 19 (1) ◽  
pp. 306-317 ◽  
Author(s):  
J. N. McElearney ◽  
L. L. Balagot ◽  
J. A. Muir ◽  
R. D. Spence
Keyword(s):  
Magnetic Properties ◽  
Two Dimensional ◽  
Heisenberg Magnet ◽  
Structural And Magnetic Properties

Structural and magnetic properties of random mixture graphite intercalation compounds

1990 ◽  
Vol 5 (2) ◽  
pp. 422-434 ◽  
Author(s):  
Masatsugu Suzuki ◽  
Louis J. Santodonato ◽  
Mildred Yeh ◽  
Samuel M. Sampere ◽  
Andrew V. Smith ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Intercalation Compounds ◽  
Ferromagnetic Phase ◽  
Two Dimensional ◽  
Graphite Intercalation Compounds ◽  
Weiss Temperature ◽  
Graphite Intercalation ◽  
Co Concentration ◽  
Structural And Magnetic Properties

The structural and magnetic properties of the stage 2 CocNi1−cCl2- and COcFe1−cCl2-graphite intercalation compounds (GICs) for 0 ≤ c ≤ 1 have been studied by x-ray scattering and dc magnetic susceptibility. The stage 2 CocNi1−cCl2-GICs approximate two-dimensional randomly-mixed ferromagnets with XY spin symmetry. The average effective magnetic moment Peff, the Curie-Weiss temperature θ, and the paramagnetic-to-ferromagnetic phase transition temperature Tc have been determined as continuously varying functions of Co concentration c. They indicate that the Co2+ and Ni2+ spins are randomly distributed on the triangular lattice sites of each intercalate layer. They also show that the intraplanar exchange interaction J(Co–Ni) between the Co2+ and Ni2+ spins is enhanced and is larger than the interaction J(Co–Co) between two Co2+ spins and J(Ni–Ni) between two Ni2+ spins. This enhanced interaction, J(Co–Ni), can be expressed as J(Co–Ni) = 1.28 [J(Co–Co) · J(Ni–Ni)]1/2. The stage 2 CocFc1−cCl2-GICs approximate two-dimensional randomly mixed ferromagnets with competing spin anisotropy. The dc magnetic susceptibility results suggest that Co2+, Fe3+ rather than Fe2+ are distributed in the intercalate layer. The repeat distance along the c-axis (d-spacing) versus Co concentration deviates from Vegard's law which states that the d-spacing is proportional to Co concentration. The broad peak of d-spacing observed at c = 0.75 is discussed in terms of the double layer model developed by Jin and Mahanti.

Mg-doping effect on structural and magnetic properties on two-dimensional triangular lattice LiVO2

2010 ◽  
Vol 107 (9) ◽  
pp. 09E108 ◽  
Author(s):  
Yang Li ◽  
Weipeng Wang ◽  
Xiaoxiang Li ◽  
Lihua Liu ◽  
Aihua Wang ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Triangular Lattice ◽  
Doping Effect ◽  
Two Dimensional ◽  
Mg Doping ◽  
Structural And Magnetic Properties

Ferromagnetic Intermolecular Interaction and Crystal Structure of α-Nitronyl Nitroxide

1989 ◽  
Vol 173 ◽  
Author(s):  
Kunio Awaga ◽  
Tamotsu Inabe ◽  
Yusei Maruyama
Keyword(s):  
Crystal Structure ◽  
Temperature Dependence ◽  
Intermolecular Interaction ◽  
Magnetic Coupling ◽  
Two Dimensional ◽  
Nitronyl Nitroxide ◽  
Magnetic Susceptibilities ◽  
X Ray ◽  
Nitronyl Nitroxides ◽  
Coulomb Attraction

ABSTRACTThe temperature dependence of the magnetic susceptibilities for several ±-nitronyl nitroxides have been measured. It is found that the intermolecular magnetic coupling in these radical crystals changes from antiferromagnetic to ferromagnetic depending on the substituents at ±-position. X-Ray crystal analysis and MO calculation have been carried out on the ferromagnetic ±-nitronyl nitroxide, 2-(4-nitrophenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazolyl-1-oxy 3-oxide, revealing a two-dimensional ferromagnetic network linked by the Nδ+...0δ− Coulomb attraction.

Structural and magnetic properties of Co(urea)2Cl2⋅2H2O: A two‐dimensional Ising system with hidden canting

1981 ◽  
Vol 75 (1) ◽  
pp. 431-439 ◽  
Author(s):  
Richard L. Carlin ◽  
Kyong O. Joung ◽  
A. van der Bilt ◽  
H. den Adel ◽  
C. J. O’Connor ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Two Dimensional ◽  
Ising System ◽  
Structural And Magnetic Properties

Structural and magnetic properties of two-dimensional layered BiFeO3 from first principles

2021 ◽  
Vol 103 (8) ◽  
Author(s):  
Chao Liu ◽  
Guodong Zhao ◽  
Tao Hu ◽  
L. Bellaiche ◽  
Wei Ren
Keyword(s):  
Magnetic Properties ◽  
First Principles ◽  
Two Dimensional ◽  
Structural And Magnetic Properties
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