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A two-dimensional octacyanomolybdate(V)-based ferrimagnet: {[Mn(II)(DMF)4]3[Mo(V)(CN)8]2}n
Jeffrey R Withers1, Dongfeng Li, Jeremy Triplet
1Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506-0055, USA.
Inorganic Chemistry
|May 23, 2006
Summary
A novel 2D network {[Mn(II)(DMF)4]3[Mo(V)(CN)8]2}n was synthesized. This ferrimagnetic material exhibits unique magnetic properties and transforms into a new magnetic phase upon heating.
Area of Science:
- Coordination Chemistry
- Materials Science
- Magnetism
Background:
- Molybdenum-cyanide clusters are versatile building blocks for coordination polymers.
- Investigating magnetic properties of extended networks is crucial for developing new magnetic materials.
Purpose of the Study:
- To synthesize and characterize a novel two-dimensional coordination network using a molybdenum-cyanide cluster and manganese ions.
- To investigate the magnetic properties of the resulting material and its thermal transformation.
Main Methods:
- Reaction of [HNBu3]3[Mo(V)(CN)8] with manganese(II) p-toluenesulfonate in N,N'-dimethylformamide (DMF).
- X-ray crystallography for structural determination of the 2D network.
- Magnetic susceptibility measurements to determine magnetic behavior and phase transitions.
Main Results:
- Formation of a 2D network {[Mn(II)(DMF)4]3[Mo(V)(CN)8]2}n (1) with a 4:2:6 ratio of Mn(II) and Mo(V) units, forming 12-membered rings.
- Compound 1 exhibits ferrimagnetism with a Néel temperature (TN) of 8 K and frequency-dependent magnetic behavior.
- Heating compound 1 results in a new magnetic phase with a higher TN of 21 K, lacking linkage isomerism.
Conclusions:
- The synthesis successfully yielded a novel 2D coordination network with interesting structural and magnetic properties.
- The material displays ferrimagnetic behavior and undergoes a phase transition upon heating, indicating potential for tunable magnetic applications.
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