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A manganese complex reported in 2021 contains 38 manganese atoms arranged in four nested structural layers. Its architecture resembles a set of nesting dolls, and the researchers reported a strong magnetocaloric effect. That finding is a laboratory result—not evidence that this particular cluster is already used in refrigeration.
How the 38 manganese atoms are arranged
The structure has four nested components, grouped into an inorganic core and an outer metal-organic periphery:
- Central octahedron: Six manganese centers form the innermost cluster.
- Cuboctahedral shell: Twelve manganese centers surround the central six. Together, these two inner layers form the
[Mn18(CO3)9]inorganic core. - Outer cube: Eight manganese centers make up a cubic cluster in the periphery.
- Outermost octahedron: The remaining twelve manganese centers form an octahedral layer around the cube. The two outer layers make up the
[Mn20]metal-organic periphery.
In total, the inner core contains 18 manganese centers and the outer periphery contains 20, giving the reported complex its 38-manganese-atom count. The resemblance to nesting dolls describes how one cluster is enclosed by another; it does not mean the structure is made of separate, removable pieces.
How the researchers prepared the complex
Chemistry World’s 9 March 2021 report describes a solvothermal, single-step, one-pot synthesis. The product was collected after crystallization. The report notes that such syntheses can depend on carefully controlled reagent ratios and conditions such as temperature, but does not provide the exact ratios, solvent, temperature, reaction time, yield, or characterization methods used for this experiment.
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What the magnetic result does—and does not—show
The report says the complex displays a strong magnetocaloric effect: applying a magnetic field causes the material to heat up. Magnetocaloric materials have found use as cryogenic refrigerants, but that is context for the broader class. The report does not establish that this particular cluster has been used in a refrigerator, is commercially available, or is ready for practical deployment.
No quantitative magnetocaloric measurement or named performance statistic is given in the report. The structural counts describe the cluster’s architecture, not its cooling performance, so they should not be read as performance figures.
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Where to find the scientific report
The study is by Tai-Xue Wu and coauthors in Chemical Communications (2021), DOI 10.1039/d0cc07884k. Chemistry World’s account identifies Hai-Ye Li and Fu-Ping Huang of Guangxi University as study leads. The primary paper is the appropriate source for detailed structural characterization and quantitative magnetic measurements.
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