| Coordination polymers are complexes of ligands with multiple connection points and different metal ions in organic compounds that are infinitely extended in different directions through coordination bonds.Coordination polymers have wide applications in different fields,such as gas adsorption and separation,removal and separation of hazardous materials,catalysis and photocatalysis,electrochemical applications,bio-related applications,and particularly,the detection of dangerous chemicals.In this paper,we are based on the organic ligands 4-?5-carboxypyridin-3-yl?phthalic acid?H3L1?,2,6-bis?2-pyrazin-2-yl?-4-?2,4,6-tricarboxyphenyl?pyridine?H3L2?,4-?triazol-1-yl?phthalic acid?H2L3?,and some different metal salts to synthesis 14 cases of complexes by hydrothermal method.They are listed as follows:[Cd?HL1??H2O?2]n?1??[Co?HL1??H2O?2]n?2??[Zn?HL1??H2O?2]n?3??[Cu?HL1??H2O?2]n?4??[Ni?H3L1??H2O?2]n?5??[Ni?HL1??H2O?2]n?6??{[Ln?L1??H2O?2]n?7-9?[Ln?12??[Cu?HL3?2?H2O?2]n?13?and[Cu?HL3?2]n?14?,which characterized the structure and properties of these complexes.And there are five chapters in this paper:The chapter 1:which introduces history,development,and applications of coordination polymers,and the significance of this thesis is elaborated in detal.The chapter 2:Six complexes were synthesized based on ligand H3L1 and transition metal ion and the magnetic properties of complexes 2,4,5 and 6 were characterized.The chapter 3:Three complexes 7-9 were prepared based on ligand H3L1 and lanthanide metal ions,and the fluorescence of complex 7 and the magnetic properties of complex 8 were characterized.The Chapter 4:Three different complexes 10-12 were synthesized based on the ligand H3L2and the metals Cu?II?and Cd?II?,and the magnetic properties of the complex 10 were studied.The Chapter 5:Based on the H2L3 ligand and the metal Cu?II?,two different complexes 13and 14 are formed.The magnetic properties of the complexes 13 and 14 show that their metal ions exhibit antiferromagnetic coupling. |
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