Syntheses and structures of three transition metal coordination polymers based on 5-Aminonicotinic acid

•Three new coordination polymers based on 5-Aminonicotinic acid with different structures.•The effects of the reaction solvents, temperatures and metal cations have been discussed.•The amino groups of 5-Aminonicotinic acid also take part in coordination.•The solid-state photoluminescence for 1 and 2 were also studied.

Three new coordination polymers (CPs) based on rigid ligand 5-Aminonicotinic acid (5-anaH), [Cd(5-ana)2]·(H2O)2 (1), [Cd(5-ana)(HCOO) ] (2) and [Cu(5-ana)2] (3), have been synthesized under different solvent media and temperatures. All CPs are characterized by single crystal X-ray diffraction, elemental analysis, IR spectroscopy, powder X-ray diffraction and thermogravimetric analysis. Compound 1 is a two-dimensional (2D) (4,4)-connected layered structure contains 1D open channels. 2 shows a 2-nodal (3,5)-connected three-dimensional (3D) framework with {52·6}{53·63·73·8} topology. While 3 displays a 3D (3,6)-connected homochiral framework with {42·6}2{44·62·85·104} topology. The solid-state photoluminescence for 1 and 2 were also studied.

Graphical abstractThree new coordination polymers (CPs) based on rigid ligand 5-Aminonicotinic acid (5-anaH), [Cd(5-ana)2]·(H2O)2 (1), [Cd(5-ana)(HCOO)] (2) and [Cu(5-ana)2] (3), have been synthesized under different solvent media and temperatures. 1 is a 2D (4,4)-connected layered structure which contains 1D open channel. 2 shows a 2-nodal (3,5)-connected 3D framework. While 3 displays a 3D (3,6)-connected homochiral framework. The significant structural differences between these CPs are related to the reaction solvents, temperatures and metal cations. The solid-state photoluminescence for 1 and 2 were studied.Figure optionsDownload full-size imageDownload as PowerPoint slide