| Coordination polymers are composed of metal ions and bridging organic ligands as primary constituents linked through covalent bonds and other weak chemical bonds to generate infinitely assembled networks. In the case of ordered structures, they can be named as coordination networks or metal-organic frameworks. The design and synthesis of such crystalline networks with desired structures and properties from ionic or molecular building blocks and analyses of their geometries are termed as crystal engineering. In this paper, we use rigid halogenated carboxylic acids and flexible l,4-bis?2-methylimidazol-1-yl?butane ligands build 14 complexes, and the structure and physical and chemical properties of complexes were also studied. The full text is divided into four parts:The first part is an introduction, we summarize overview of coordination polymers, the role of ligands, application of coordination polymers, coordination polymers based on rigid halogenated carboxylic acids and flexible bis?imidazole? ligands and introduce the topics basis and significance of the paper.In the second part, ten new coordination networks containing rigid fluorocarboxylic acid, flexible bis?imidazole? ligands and transtion metal ions have been successfully synthesized by solvothermal method or diffusion method under different reaction conditions, {[Co0.5?bib?0.5?tftpa?0.5]·0.5H2O}n ?1?, [Cd2?bib??tftpa?2]n ?2?, [Ni0.5?bib?0.5?tftpa?0.5]n ?3?, {[Co0.5?tftpa??H2O?]·0.5bib·EtOH}n ?4?,{[Cd0.5?tftpa??H2O?]·0.5bibEtOH}n ?5?, [Cd3?bib?3?tftpa?3?MeOH?3]n ?6?, and [Cd?bib??tftpa??MeOH?]n ?7?,[Cu0.5?bib?0.5?tftpa?0.5]n ?8?,{[Zn0.5?bib?0.5?tftpa?0.5]·0.5H2O}n ?9?, [Cd?bib??tftpa??EtOH?]n ?10?, ?bib=1,4-bis?2-methylimidazol-1-yl?butane, H2tftpa= tetrafluoroterephthalic acid?. The synthesized coordination polymers have been characterized by X-ray powder diffraction, elemental analysis, IR spectra, thermogravimetric analysis, focus on the fluorescence properties of complexes and which are expected to find potential application value.In the third part, four new coordination networks based on rigid bromocarboxylic acid, flexible bis?imidazole? ligands and transtion metal ions have been successfully synthesized by solvothermal method, [Cu2?bib?2?tbtpa?2]n ?11?, [Cd?bib?0.5?H2tbtpa??H2O?]n ?12?, {[Ni2?bib??5-Br-H2ip?2H2O]·0.5H2O}n?13?,{[Ni?bib??5-Br-H2ip?]·DMA}n?14?, ?bib= 1,4-bis?2-methylimidazol-1-yl?butane, H2tbtpa= tetrabromoterephthalic acid,5-Br-Hbip= 5-bromoisophthalic acid?. The crystal structure and physical and chemical performance of the target coordination polymers have been characterized.The fourth part is the conclusion. |
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