Synthesis And Properties Of Multifunctional Coordination Polymers Based On Rigid Aromatic Ligands

Coordination polymers are 1D,2D,and 3D structures composed of metal ions and organic ligands into an infinite array.Due to the different coordination modes of metal ions,the diversity of organic ligands and the differences in preparation methods,the structures and pore channels of the coordination polymers have rich possibilities and adjustable design.So coordination polymers have attracted wide attention in many fields such as luminescence,catalysis,gas storage and separation.Therefore,it is of great significance to design and develop multi-functional coordination polymers.Based on function oriented design train of thought,some aromatic carboxylic ligands was synthesized,through regulating the influence of different factors（including solvents,pH,synthetic methods,temperature,ratio of reactants,cooling rate,etc.）,to construct the different series of novel multifunctional coordination polymers,and its glow in sensing,catalytic ability of CO₂ cycloaddition was studied.The main contents of this issue are as follows:（1）The research background,development status and related fields of coordination polymers are briefly introduced.The construction ideas,synthesis methods and properties of coordination polymers in different fields are reviewed.（2）A series of transition metal coordination polymers based on methoxy carboxylic ligand were designed and synthesized.The results showed that L¹-Zn can catalyze the CO₂ cycloaddition reaction well,with high catalytic conversion,short reaction time and wide range of substrates.The stable heterogeneous structure is easy to be used for catalyst separation and recycling.L¹-Zn as sensors,for in the ion of Fe（Ⅲ）,Cr（Ⅵ）has the very good quenching recognition performance,to Cr（Ⅲ）with fluorescence enhancement recognition function,and has good selectivity.For nitro explosives,picric acid can be highly selective identification,visual detection limit of10^-66 M.（3）A series of metal complexes based on naphthylimide carboxylic ligand were designed and synthesized.L²-Zn has excellent fluorescence,the Fe（Ⅲ）,Cr（Ⅵ）,picric acid showed good sensor performance,good selectivity and sensitivity.It is a catalyst with high catalytic conversion,short reaction time and wide range of suitable substrates.L²-Eu exhibits white luminescence under excitation at 365nm,but the regulation of its color coordinates to achieve pure white light emission requires further study.