| In recent years,lanthanide-organic frameworks?Ln-MOFs?have increased great attention for their potential applications as sensors,optical devices,catalysis,et al.However,sufferring from syntheses conditions and thermo/water stability of materials,it is still difficult to afford Ln-MOFs with defined structures and properties.The rational choice of organic ligands plays an important role for the construction of Ln-MOFs.In this work,we designed and sythesized two new functionalized organic carboxylic acid to generate two series of Ln-MOFs.Their structures have been characterized by Single-crystal X-ray diffffraction analysis,X-ray diffraction?XRD?,TGA,EDX,FIR,and so on.We also evaluated their applications as non-linear optical materials and fluorescent sensors.1.Synthesis and Properties of Lanthanide-organic Frameworks materials Based on Low Symmetric Tricarboxylic AcidsIn this work,an Eu?III?-based metal-organic framework[Eu2L2?DMF??H2O?2]·2DMF·H2O[H3L=5-?1-carboxynaphthalen-4-yl?benzene-1,3-dioic acid]?1?has been synthesized and structurally characterized.This compound can be used as an efficient sensor for the detection of Cu2+,Fe3+and 4-nitrophenol with low detection limits of 1.83×10-55 M,1.22×10-55 M and 3.63×10-55 M respectively.It also displays a high second-harmonic generation response,which is 2.0 times that of KDP.2.Tb3+Post-Functionalization of UiO-67 Type MOF for Efficient Detection of Aniline,Cr2O72-and Fe3+in Aqueous SolutionIn this work,we reported a lanthanide-affinity group pyridin-4?1H?-one decorated UiO-67 type MOF?UiO-67-PO?.Through post-synthetic modification,Tb3+can be encapsulated in the pores by coordination bonds with pyridin-4?1H?-one.The Tb3+-loaded Tb3+@UiO-67-PO exhibits strong luminescence and water-stability for the sensitization and protection provided by the framework.Tb3+@UiO-67-PO can serve as an efficient sensor for detection of aniline,Cr2O72-and Fe3+in aqueous solution. |
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