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Updated: Jun 7, 2025
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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
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A [Mn8] Defective Supertetrahedron T3 and Its Dimeric [Mn16] Analogue
Antonis Anastassiades1, Dimitris I Alexandropoulos1,2, Ashlyn Hale3
1Department of Chemistry, University of Cyprus, Nicosia 1678, Cyprus.
Crystal Growth & Design
|November 13, 2024
Summary
The new 2-(pyridin-2-yl)propane-1,3-diol ligand facilitated the creation of two novel manganese clusters. These clusters exhibit antiferromagnetic interactions and unique structural cores, showcasing the ligand
Area of Science:
- Inorganic Chemistry
- Materials Science
- Magnetochemistry
Background:
- Polynuclear manganese clusters are of interest for their magnetic properties.
- Developing new ligands is crucial for synthesizing complex metal clusters.
Purpose of the Study:
- To explore the use of 2-(pyridin-2-yl)propane-1,3-diol (pypdH2) in synthesizing novel manganese clusters.
- To characterize the structure and magnetic properties of the resulting polynuclear manganese complexes.
Main Methods:
- Synthesis of two new mixed-valence polynuclear manganese clusters: [Mn8O5(pypd)(hmp)3(O2CCMe3)8] (1) and [Mn16O10(N3)2(pypd)2{(py)2CO2}4(O2CEt)12] (2).
- Structural characterization of the clusters.
- Direct current (dc) magnetic susceptibility studies to investigate magnetic exchange interactions.
Main Results:
- Compound 1 features a novel [Mn7III MnII(μ4-O)2(μ3-O)3(μ-OR)5]8+ core, resembling a supertetrahedron T3.
- Compound 2, a dimeric analogue of 1, possesses a [Mn14III MnII2(μ4-O)4(μ3-O)6(μ-N3)2(μ3-OR)2(μ-OR)8]14+ core.
- Both complexes exhibit dominant antiferromagnetic exchange interactions and small ground state spin values.
Conclusions:
- The polyol-like chelating ligand 2-(pyridin-2-yl)propane-1,3-diol (pypdH2) is effective in stabilizing high nuclearity 3d metal clusters.
- The synthesized clusters present unique structural motifs and magnetic properties.
- This work expands the library of ligands capable of forming complex polynuclear metal assemblies.
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