| Since the 1990s,metal organic framework compounds have emerged as a new type of material and have attracted wide attention from chemists,due to their wide applications in the field of drug delivery,molecular recognition,gas adsorption and separation,et al.In this paper,seven complexes based on 3-?3-carboxylphenyl?-6-carboxylpyridine?H2CPPCA?with transition metal and rare earth metal were synthesized under reaction system.The complexes were characterized by infrared test,thermogravimetric test,et al.Moreover,fluorescence properties and adsorption performance of the complexes have also been studied.The main contents are as follows:1.Using transition metal Mn with H2CPPCA,a metal organic framework compound MnCPPCAH2O?1?have been design and synthesized under solvothermal conditions.The Compound 1 is isomorphic frameworks with 0D mononuclear structure,and the 0D structures were further linked to form a 3D supramolecular framework through hydrogen bond interaction.The two metal organic framework compounds Cu2?CPPCA?2bpy?H2O?2?2?and Cu2?CPPCA?2bpy?H2O?2?3?have been design,based on H2CPPCA,4,4-dipyridyl,and2,2-dipyridyl with metal Cu.Among them,2 is a 1D chain structure,and a three-dimensional supramolecular structure is further formed by hydrogen bonding.It can be known from the results of single crystal diffraction that 3 is a mononuclear structure,and then it forms a three-dimensional framework by hydrogen bonding.2.Two complexes[Zn?cis-CPPCA??H2O?]n?4?,[Zn?trans-CPPCA??H2O?]n?5?were synthesized by hydrothermal and solvothermal reaction,using organic ligand H2CPPCA and metal Zn salt.When water is used as a solvent,a metal organic framework compound 4 is obtained.4 is a 2D layer structure,and a 3D supramolecular structure is further formed by the?···?stacking interaction.When mixed solvents H2O/CH3CN are used,a 3D metal organic framework compound 5 containing 1D pores was obtained.Because the rotation angles of theC-C bond of the benzene ring and the pyridine ring are different,the ligands in 4 and 5respectively show cis-and trans-structures,thus forming different skeletal structures.In addition,we investigated the relevant fluorescence properties of the metal-organic framework compounds 4 and 5 and found that only the acetone solution can quench the fluorescence of the compound 5,while the metal organic framework compound 4 is no quenching phenomenon.In addition,we found that 4 and 5 can also detect Fe3+.We also performed a dye adsorption and dye-affinitiated fluorescence study on 5.The MB@5 and RhB@5 showed blue light and bright red light and the intencity of fluorescence was stronger than compound5.3.Using H2CPPCA and oxalic acid to react with rare earth metal salts,two homogeneouslanthanidemetalorganicframeworkcompounds Ln2?CPPCA?2?OX??H2O?4?Ln=Eu?6?,Tb?7??is obtained under hydrothermal conditions.It is known from X-ray single crystal diffraction that all of them are 3D open skeleton structures.In addition,we also studied the solid fluorescence and liquid fluorescence of complexes 6 and7,and further tested the fluorescence emission of complexes 6 and 7 in different solvents and metal salts.We found that they can be used as fluorescent probes to detect aniline molecules and Fe3+. |
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