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A ring of grids: a giant spin-crossover cluster
Takuya Shiga1, Minami Tachibana1, Hajime Sagayama2
1Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki 305-8571, Japan. shiga@chem.tsukuba.ac.jp.
Chemical Communications (Cambridge, England)
|September 13, 2021
Summary
Researchers synthesized mononuclear and icosanuclear spin-crossover iron(II) complexes using a novel ligand. These complexes exhibit distinct structural features, including bis-chelate and ring-shaped arrangements, paving the way for new material applications.
Area of Science:
- Coordination Chemistry
- Materials Science
- Supramolecular Chemistry
Background:
- Spin-crossover (SCO) complexes are of interest due to their potential applications in sensors and memory devices.
- Designing SCO complexes with tunable properties requires careful control over molecular architecture and metal coordination.
Purpose of the Study:
- To synthesize novel mononuclear and icosanuclear iron(II) spin-crossover complexes.
- To investigate the structural characteristics of these complexes using an asymmetric multidentate ligand.
Main Methods:
- Synthesis of mononuclear [FeII(HL)2](BF4)2 (1) and icosanuclear [FeII20(L)24](BF4)16 (2) complexes.
- Characterization of the complexes' structures, including bis-chelate and ring-shape formations.
Main Results:
- Successful synthesis of two distinct iron(II) spin-crossover complexes.
- Complex 1 features a bis-chelate structure with protonated ligands.
- Complex 2 exhibits a complex ring-shape structure composed of grid moieties and mononuclear units.
Conclusions:
- The study demonstrates the feasibility of creating diverse spin-crossover architectures using a single asymmetric ligand.
- The synthesized complexes offer a platform for exploring structure-property relationships in spin-crossover materials.
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