源起于发霉甜苜蓿，脱胎于生化实验室，华法林先生起初作为一种强力灭鼠毒药大杀四方。然而，在进入医药领域的道路上，他却因毒药的身份标签和种种流言而饱受质疑和反对。科学家们揭示了华法林抗凝血的机制，并证明了华法林抗凝治疗对患者的益处。从此，华法林先生以及他的衍生物们成为了抗凝治疗和防治鼠害的前线战士。

Based on the 5-(3, 4-dicarboxyphenoxy) isophthalic acid (H₄dppa) ligand, two lanthanide metal-organic frameworks (Ln-MOFs) were designed and synthesized by hydrothermal synthesis: {(dima)[Dy(dppa)(H₂O)₂]·2.5H₂O}_n (Dy - MOF) and {(dima) [Eu(dppa) (H₂O)₂]·1.5H₂O}_n (Eu - MOF) (dima=dimethylamine cation). The structures were characterized by elemental analysis, infrared spectroscopy, single-crystal X-ray diffraction, etc. Dy-MOF and Eu- MOF are hetero-isomorphic 2D network structures, and adjacent 2D networks further form 3D supramolecular network structures through hydrogen bonding. Fluorescence analysis shows that Dy-MOF and Eu-MOF have excellent fluorescence properties at room temperature, and Dy-MOF has excellent fluorescence sensing properties, which can efficiently and high-sensitively detect a variety of pollutants in water: aniline (ANI), nitrobenzene (NB), tetracycline (TC), pyrimethanil (PTH), and tryptophan (Trp). The fluorescence quenching mechanism of Dy-MOF in detecting pollutants was also investigated.

A coordination polymer {[Cd(H₂dpa)(bpy)]·3H₂O}_n (Cd-CP) was designed and hydrothermal synthesized based on 4-(2, 4-dicarboxyphenoxy) phthalic acid (H₄dpa), 2, 2′-bipyridine (bpy) and Cd(NO₃)₂·4H₂O. The structure was characterized by single-crystal X-ray diffraction, powder X-ray diffraction, elemental analysis, and infrared spectroscopy. Cd-CP belongs to the monoclinic crystal system with the P2₁/c space group and performs in a 1D double-chain structure. The adjacent double chains further form a 3D supramolecular network structure through hydrogen bonding. Thermogravimetric analysis shows that Cd-CP has good thermal stability. Fluorescence analysis showed that Cd-CP had good choosing selectively and was sensitive to metal ions (Fe³⁺ and Zn²⁺), 2, 4, 6-trinitrophenylhydrazine (TRI), and pyrimethanil (Pth). Interestingly, when Cd-CP was used for fluorescence detection of metal ions, it was found to have a fluorescence quenching effect on Fe³⁺ but had an obvious enhancement effect on Zn²⁺. Therefore, we designed an "on-off-on" logic gate. In addition, the mechanism of fluorescence sensing has been deeply explored.

A cadmium-based coordination polymer [Cd₄(L)₄(1,4-bib)₄]·2DMA (CP1) was synthesized under solvothermal conditions, where H₂L=2 hydroxyterephthalic acid, 1, 4 bib=1, 4 bis(imidazol1 ylmethyl) benzene, and DMA=N,N-dimethylacetamide. The structure was characterized by thermogravimetric analysis, elemental analysis, infrared spectroscopy, and single-crystal X-ray diffraction. The single crystal structure shows that CP1 belongs to the orthorhombic system, the space group Pna2₁, Cd(Ⅱ) forms a 2D plane structure through L^2-, and the 2D plane structure forms a 3D network with pcu topology through 1,4-bib. CP1 shows good fluorescence sensing performance and thermal stability and realizes efficient and sensitive detection of 2,4,6-trinitrophenol (TNP), Fe³⁺, and fluridine (FLU). The detection limits were 0.051 μmol·L^-1 (TNP), 0.65 μmol·L^-1 (Fe³⁺), and 0.14 μmol·L^-1 (FLU), respectively. In addition, the mechanism of fluorescence detection of pollutant detection was explored and a portable test paper was successfully prepared. A portable test paper could not only selectively detect FLU, but also showed different fluorescence colors in different concentrations of FLU.