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  • Temperature-Induced Structu...
    Xu, Mei-Yu; Liang, Guang-Yuan; Feng, Jian-Shen; Liang, Guang-Ming; Wang, Xiu-Jian

    Crystal growth & design, 03/2022, Letnik: 22, Številka: 3
    Journal Article

    Three new types of lanthanide coordination polymersone-dimensional (1D) {Ln­(TCMA)­(HTCMA)·(DMF)·(H2O)2} n (1–2), three-dimensional (3D) {Ln­(TCMA)­(NO3)} n (3–4), and zero-dimensional (0D) Ln4­(TCMA)4­(OH)4­(H2O)8 (5–6) (Ln = Eu, Tb) have been hydrothermally synthesized by using the ligand N,N,N-tris­{(2′-carboxy­1,1′-biphenyl-4-yl)­methyl}­methylammonium chloride (H3TCMA+­Cl). Interestingly, the 1D chain and 3D Ln-MOFs can be transformed to a more stable 0D cage structure by changing temperature-induced ligand’s configuration transformation, which is attributed to the ligand’s semirigid feature. Furthermore, the crystal structures of 1–6 were characterized and confirmed by X-ray single-crystal analysis, X-ray diffraction (XRD), thermogravimetric analysis (TGA), ultimate analysis, and infrared (IR) spectroscopy. The luminescence detection results show that the 3D Eu-MOFs have good sensitivity and selectivity to detect Fe3+ ions in methanol solutions. And, with careful adjustment of metal ratios (Eu/Tb) in the reaction mixtures, color tuning was easily achieved. Moreover, lifetime data and quantum yield are reported for these complexes (1–6) prepared in this study.