Abstract
(1-methyl-1H-benzo[d]imidazol-2-yl) methanol (Hmbm) reacts with Mn(ClO4)2·6H2O to form heptanuclear disks [Mn7(mbm)12]·2(ClO4) (1) under ambient conditions. The heptanuclear cluster was previously described as a double calix unit with the hydroxides in the middle. The seven Mn(II) ions are essentially coplanar as expected for all edge-sharing octahedra, which can be intituled as a segment of Mg(OH)2 layer of brucite, so it is a symmetric disk. ESI–MS of crystals showed its stability in solution. Time-dependent mass spectrometry (MS) from solutions at different period of the assembly reveal a hierarchical sequence, [MnIII(mbm)2]+ → [MnII2(mbm)3]+ → [MnII4(mbm)6(ClO4)]+ → [MnIIIMnII6(mbm)12(ClO4)2]+.
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Acknowledgements
This work was supported by the National Science Foundation for Distinguished Young Scholars of China (No. 21525101), the NSF of Hubei Province (No. 2017CFA006), the NSF of Guangxi Province (No. 2017GXNSFDA198040) and the BAGUI talent program. M. K. is funded by the CNRS-France.
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Jiang, LP., Zeng, MH. Crystallography and Mass-Spectrometry of Heptanuclear Disk Mn(II) Cluster. J Clust Sci 33, 1831–1837 (2022). https://doi.org/10.1007/s10876-021-02062-z
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DOI: https://doi.org/10.1007/s10876-021-02062-z