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Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
Published on: February 5, 2022
Cluster-based networks: 1D and 2D coordination polymers based on {MnFe2(μ3-O)}-type clusters.
Galina M Dulcevscaia1, Irina G Filippova, Manfred Speldrich
1Institute of Applied Physics, Academy of Sciences of Moldova, Academiei 5, MD-2028 Chisinau, Republic of Moldova.
Inorganic Chemistry
|April 25, 2012
Summary
This study introduces new manganese-iron coordination polymers using mixed-valent manganese and iron clusters. Magnetic studies reveal dominant antiferromagnetic interactions within these novel materials.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Coordination Chemistry
Background:
- Heterometallic coordination polymers offer tunable properties by combining different metal ions.
- Cluster-based coordination polymers provide well-defined structural units for designing advanced materials.
Purpose of the Study:
- To synthesize novel heterometallic manganese-iron cluster-based coordination polymers.
- To investigate the structural diversity and magnetic properties of these new materials.
Main Methods:
- Reaction of pre-formed mixed-valent manganese(II/III) and iron(III) pivalate clusters.
- Single-crystal X-ray diffraction for structural elucidation.
- Magnetic susceptibility measurements and data modeling.
Main Results:
- Three new heterometallic {Mn(II)Fe(III)(2)} coordination polymers were synthesized: 1D chains (3, 4) and a 2D layer (5).
- Structural analysis revealed μ(3)-oxo trinuclear pivalate clusters as the core building blocks.
- Dominant antiferromagnetic interactions were observed between metal centers in all synthesized compounds.
Conclusions:
- A straightforward synthetic route to heterometallic Mn-Fe cluster-based coordination polymers was established.
- The structural diversity is influenced by the coordination mode of hexamethylenetetramine (hmta).
- The magnetic properties are characterized by significant antiferromagnetic coupling, with intercluster interactions playing a crucial role.
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