Ferromagnetic exchange coupling in sodium biscarbonatocuprate(II) trihydrate

1982 ◽  
Vol 35 (8) ◽  
pp. 1537 ◽  
Author(s):  
AK Gregson ◽  
NT Moxon ◽  
RR Weller ◽  
WE Hatfield
Keyword(s):  
Magnetic Susceptibility ◽  
Linear Chain ◽  
Data Set ◽  
Magnetic Susceptibility Data ◽  
Temperature Range ◽  
Susceptibility Data ◽  
Ferromagnetic Exchange ◽  
Ferromagnetic Interactions ◽  
G Value ◽  
Best Fit

The magnetic properties of sodium biscarbonatocuprate(II) trihydrate, Na2Cu(CO2)2,3H2O, have been measured in the temperature range 1.8-42 K. Magnetic susceptibility and magnetization measurements provide evidence for ferromagnetic interactions in this linear-chain compound. The magnetic susceptibility data are compatible with a Heisenberg linear chain; the best-fit parameters for the complete data set are: J 1.22 �0.04cm-1, g 2.18 � 0.01, and zJ'-0.28 � 0.02cm-l. Data in the temperature range 7-42K yield the best-fit parameters J1.37 � 0.08 cm-1, g 2.12 � 0.01, and zJ' 0.0 cm-1. The g value from this fit agrees with the g value of 2.10 obtained from a fit of the data in the temperature range 10-42 K to the Curie-Weiss law.

Ferromagnetic interactions in a dicyanamide-bridged multinuclear metal-organic framework [Pr3NH]+ [Mn(dca)3]−·H2O

2019 ◽  
Vol 74 (6) ◽  
pp. 485-489
Author(s):  
Yuan Huang ◽  
Xiu-feng Yu ◽  
Zhen Rong ◽  
Yi-chun Ai ◽  
Kun Qian ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Magnetic Measurements ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
X Ray Diffraction ◽  
Magnetic Susceptibility Data ◽  
X Ray ◽  
Susceptibility Data ◽  
Metal Organic ◽  
Ferromagnetic Interactions

AbstractA new complex [Pr3NH]+ [Mn(dca)3]− · H2O (dicyanamide = dca−) was synthesized, in which the Mn2+ cations are bridged by end-to-end dca anions to form three-dimensional [Mn(dca)3]nn− networks and tripropylammonium cations reside in the cavities of these networks. The complex has been characterized by single-crystal X-ray diffraction, infrared spectroscopy, elemental analysis, and magnetic measurements. Magnetic susceptibility data indicate ferromagnetic interactions among the MnII ions.

Structure and magnetic exchange in poly-bis(pyrazine)bis(methanesulfonato-O)-copper(II). One-dimensional exchange in a two-dimensional polymer

1987 ◽  
Vol 65 (2) ◽  
pp. 420-426 ◽  
Author(s):  
John S. Haynes ◽  
Steven J. Rettig ◽  
John R. Sams ◽  
Robert C. Thompson ◽  
James Trotter
Keyword(s):  
Magnetic Susceptibility ◽  
Heavy Atom ◽  
Linear Chain ◽  
Differential Scanning Calorimetric ◽  
Magnetic Exchange ◽  
Magnetic Susceptibility Data ◽  
Susceptibility Data ◽  
Pyridine Complex ◽  
Calorimetric Studies ◽  
Square Array

Crystals of poly-bis(pyrazine)bis(methanesulfonato-O)copper(II) are orthorhombic, a = 8.199(1), b = 13.130(1), c = 6.913(1) Å, Z = 2, space group Pnnm. The structure was solved by conventional heavy atom methods and was refined by full-matrix least-squares procedures to R = 0.025 and Rw = 0.033 for 1226 reflections with I ≥ 3σ(I). The complex contains parallel sheets, each sheet consisting of a square array of copper(II) ions bridged by two types of bidentate pyrazine ligands. The CuN4O2 chromophore is tetragonally elongated; the equatorial plane contains two pyrazine nitrogen atoms (Cu—N(1) = 2.058(2) Å) and two oxygen atoms from monodentate methanesulfonate ligands (Cu—O(1) = 1.956(1) Å); the axial sites are occupied by bridging pyrazine groups with significantly longer Cu—N bond lengths (Cu—N(2) = 2.692(2) Å) Magnetic susceptibility studies (82 to 4.2 K) reveal antiferromagnetic behaviour with a susceptibility maximum at about 6.2 K. Exchange coupling in the complex is considered to take place primarily via the more strongly bound, equatorially coordinated pyrazine ligands. Analysis of the magnetic susceptibility data according to a Heisenberg linear chain of interacting S = 1/2 spins yields best fit values of J = −3.82 cm−1 and g = 2.13. Vibrational and electronic spectroscopic and differential scanning calorimetric studies on the title compound and, for comparison, on the related mononuclear pyridine complex, bis(methanesulfonato)-tetrakis(pyridine)copper(II), are also reported.

Synthesis, crystal structure, and magnetic properties of the complex [(CH3)3NH]2 [Co(NCS)4]

2018 ◽  
Vol 73 (8) ◽  
pp. 571-575
Author(s):  
Yang Jie ◽  
Huang Yuan ◽  
Zhong YouQuan ◽  
Fang Ting ◽  
Hao Fan ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Infrared Spectroscopy ◽  
Magnetic Measurements ◽  
X Ray Diffraction ◽  
Magnetic Susceptibility Data ◽  
X Ray ◽  
Susceptibility Data ◽  
Ferromagnetic Interactions

AbstractA new complex [(CH3)3NH]2[Co(NCS)4], in which zero-dimensional [Co(NCS)4]n2− anions are balanced by 2n [(CH3)3NH]+ cations, was synthesized. The complex has been characterized by single X-ray diffraction, infrared spectroscopy, elemental analysis, and magnetic measurements. Magnetic susceptibility data indicate ferromagnetic interactions among the CoII ions.

scholarly journals Collective Magnetic Behavior of 11 nm Photo-Switchable CsCoFe Prussian Blue Analogue Nanocrystals: Effect of Dilution and Light Intensity

2021 ◽  
Vol 7 (7) ◽  
pp. 99
Author(s):  
Linh Trinh ◽  
Eric Rivière ◽  
Sandra Mazerat ◽  
Laure Catala ◽  
Talal Mallah
Keyword(s):  
Magnetic Susceptibility ◽  
Light Intensity ◽  
Prussian Blue ◽  
Magnetic Behavior ◽  
Magnetic Interaction ◽  
Light Irradiation ◽  
Prussian Blue Analogue ◽  
Magnetic Susceptibility Data ◽  
Susceptibility Data

The collective magnetic behavior of photoswitchable 11 nm cyanide-bridged nanoparticles based of the Prussian blue analogue CsCoFe were investigated when embedded in two different matrices with different concentrations. The effect of the intensity of light irradiation was studied in the less concentrated sample. Magnetization studies and alternating magnetic susceptibility data are consistent with a collective magnetic behavior due to interparticle dipolar magnetic interaction for the two compounds, even though the objects have a size that place them in the superparamagnetic regime.

Magnetic Properties of Liquid Crystals Incorporating Metal Centres

1989 ◽  
Vol 175 ◽  
Author(s):  
Wolfgang Haase ◽  
Stefan Gehring ◽  
Bettina Borchers
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Liquid Crystals ◽  
Molecular Interactions ◽  
Magnetic Susceptibility Data ◽  
Susceptibility Data ◽  
Magnetic Effects ◽  
Diamagnetic Anisotropy

AbstractMagnetic susceptibility data (300–520 K) of monomeric and dimeric mesogenic copper(II) compounds are presented. Different magnetic effects arising from the paramagnetic Cu(II)-centres and the diamagnetic anisotropy of the mesogenic groups are observed and discussed with respect to possible inter molecular interactions.

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