| The structure of the complex can be modified and its function can be adjusted.It has attracted much attention of researchers,and its structure is greatly affected by the ligand.According to the principle of grid chemistry,the topological structure of the complex can be predicted to a certain extent according to the size and shape of the ligand.Generally,compounds containing coordination atoms such as N and O are ideal candidate ligands for the construction of complexes.This thesis is based on group's prophase research on the construction of complexes with2,2'-bipyridine-3,3'-dicarboxylic acid-1,1'-dioxide(H2bpdado)ligand and tetrazine pyridine ligands,further expand the structure type of the complex,deeply explore its performance,and apply it to the field of pollutant fluorescence detection and dye adsorption degradation.This thesis consists of three chapters:Chapter 1:This chapter briefly describes the concept,development process and practical application of complexes,and proposes the basis for the topic selection and research ideas of this thesis.Chapter 2:In this chapter,Zn(?)ion,H2bpdado ligand and 1,2-bis(4-pyridine)-ethane(dpa)ligand are used to construct two complexes by diffusion method:{[Zn0.5(dpa)0.5(bpdado)0.5]·2H2O}n(1),{[Zn1.5(dpa)1.5(bpdado)1.5]·2H2O}n(2).Complex 1 is a 1D structure which consists of Zn(?)ion linking H2bpdado ligand and dpa ligand.When complex 1 exposed to the air,complex 2 will be produced.The original 1D chain is still retained in complex 2,accompanied by the twisting of the ligand structure,the coordination configuration of Zn(?)ions changes from a four-coordinate deformed tetrahedral configuration to a five-coordinate triangular bipyramid configuration and a six-coordinate twisted octahedral configuration.In addition,the results of the properties study show that complex 2 can be used as a fluorescent probe to identify nitrobenzene compounds and antibiotics in the solution.Chapter 3:In this chapter,tetrazine pyridine ligands 3,6-bis(3-pyridyl)-1,2,4,5-tetrazine(3-bptz)and 3,6-bis(4-pyridyl)-1,2,4,5-tetrazine(4-bptz)ligand is selected as the main ligand,with organic small molecule carboxylic acid(trimesic acid H3btc,pyromellitic acid H4btc,L-Aspartic acid L-Asp)as auxiliary ligand and transition metal(Zn?/Mn?/Co?/Cu?),a total of four complexes have been synthesized by hydrothermalmethod:{[Zn(4-bptz)(Hbtc)]·H2O·DMF}n(3),{[Mn(4-bptz)(Hbtc)]·H2O·2DMF}n(4),{[Co(4-bptz)(btc)]·2H2O·DMF}n(5),{[Cu(3-bptz)0.5(L-asp)]·1.5H2O}n(6).Among them,the two complexes 3 and 4 are isostructural complexes with different central metal atoms.The H3btc ligand connects the 1D chain which is formed of the metal ion and the 4-bptz ligand to form a 2D double layer.The 2D double layer then stacked to form a 3D supramolecular structure through hydrogen bond interaction.In 5 and 6,the metal ion and the carboxylic acid ligand to form a 2D surface,the bptz ligand connects the 2D surface to form a 3D structure.The results of the properties study show that the complex 3 can degrade methylene blue(MB)and rhodamine B(Rh B)dyes in water under the catalysis of a465 nm ultraviolet light source,and adsorb congo red dye(CR)without an external ultraviolet light source.Complex 3 can also be used as a fluorescent probe,to identify Fe3+and Mn O4-ions in the solution.In addition,the porosity of complexes 3-6 are better,so its adsorption effect has been studied. |
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