A newly reported organometallic complex contains 38 manganese atoms arranged in nested layers, like a set of matryoshka dolls. Its structure combines an inorganic core with a metal-organic outer section; the researchers also reported a strong magnetocaloric effect, a property relevant to cryogenic refrigeration research.
How the 38 manganese atoms are nested
The complex, reported by Tai-Xue Wu and colleagues in Chemical Communications in 2021, has four structural layers. Read from the center outward:
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- Central octahedron: six manganese atoms form the innermost cluster.
- Cuboctahedral shell: 12 manganese atoms surround the central six. Together, these two inner layers form the inorganic
[Mn18(CO3)9]core. - Cubic layer: eight manganese atoms make up a cluster in the outer, metal-organic portion.
- Outer octahedron: a further 12 manganese atoms encapsulate the cubic cluster. These outer layers comprise the
[Mn20]metal-organic periphery.
The counts add to 38 manganese atoms: 18 in the inorganic core and 20 in the metal-organic periphery. Chemistry World described the nested arrangement on 9 March 2021 and identified Hai-Ye Li and Fu-Ping Huang of Guangxi University as study leads. Chemistry World’s report cites the primary paper by Tai-Xue Wu et al., Chemical Communications (2021), DOI 10.1039/d0cc07884k.
How researchers prepared the complex
The report describes a single-step, one-pot solvothermal synthesis. The product was collected after crystallization. In this kind of preparation, outcome can depend on carefully controlled reagent ratios and reaction conditions, including temperature.
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The report does not provide this experiment’s exact reagent ratios, solvent, temperature, reaction duration, yield, or characterization methods. Those details should not be inferred from the brief account; the cited paper is the source for the full experimental procedure.
What its magnetic behavior 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 are relevant to cryogenic refrigeration, but that context does not establish that this particular cluster has been used in a refrigerator or is ready for practical deployment.
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The report provides no quantitative magnetocaloric measurement or named performance statistic. The structural atom counts describe the molecule, not its refrigeration performance.
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