Abstract
A pair of 2D MOFs, [Tm4(ipO)4(H2O)4] (1) and [Tm2(ipO)2(DMF)(H2O)] (2), have been solvothermally synthesized using 2-hydroxyisophthalic acid (H3ipO) ligand. Both of them are structurally characterized by single-crystal X-ray diffraction, IR, TGA and PXRD. They all consist of [Tm2] Secondary Building Units (SBUs), in which two TmIII ions are double bridged by the Ophenol from ipO3− ligands. It is interesting that the tiny change of the reaction solvents has resulted in structural dissimilarity between them. Two types of centrosymmetric SBUs, namely, [Tm2(ipO)2] and [Tm2(ipO)2(H2O)2], are observed in 1. While 2 is built by the SBUs of [Tm2(ipO)2(DMF)(H2O)], in which two TmIII centers show distinct coordination geometries. Furthermore, the difference in the linkages between the SBUs of two MOFs are also found, though two MOFs show rather similar 2D framework structures. The mesurements of variable temperature magnetic susceptibility revealed the occurrence of weak antiferromagnetic interaction between the TmIII centers in two systems.
Graphical Abstract
A pair of 2D TmIII MOFs based on [Tm2] Secondary Building Units have been prepared with 2-hydroxyisophthalic acid ligand. Different coordinated solvents have induced the structural dissimilarity between two MOFs. Magnetic investigation indicated the antiferromagnetic interactions in both systems.
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This work was financially supported by the National Natural Science Foundation of China (Grants 21961008 and 22075058).
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Pan, HD., Wu, CE., Chen, JH. et al. A Pair of 2D MOFs Based on [Tm2] Secondary Building Units: Syntheses, Structural Variation and Magnetic Properties. J Clust Sci 34, 1769–1776 (2023). https://doi.org/10.1007/s10876-022-02347-x
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DOI: https://doi.org/10.1007/s10876-022-02347-x