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Xu, Mei-Yu; Liang, Guang-Yuan; Feng, Jian-Shen; Liang, Guang-Ming; Wang, Xiu-Jian
Crystal growth & design, 03/2022, Letnik: 22, Številka: 3Journal Article
Three new types of lanthanide coordination polymersone-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.
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