Syntheses,structures,luminescent and magnetic properties of two coordination polymers based on a flexible multidentate carboxylate ligand

Two coordination polymers,{[Cu;（tci）;（DMAc）;]-6DMAc 2H;O};（1） and {[Cu;（tci）;（tpt）;（H;O）;].2DMAc-2H;O};（2）(H;tci = tris（2-carboxyethyI）isocyanurate,tpt = 2,4,6-tris（4-pyridyl）-l,3,5-triazine,DMAc = N,/V-dimethylacetamide),have been constructed under solvothermal conditions.Both polymers were structurally characterized by single crystal X-ray diffraction,elemental analyses,IR spectra,thermogravimetric（TG） analyses and powder X-ray diffraction（RXPD）.1 shows a（3,4）-connected 2D layer structure comprising Cu;（CO;）4 paddle-wheel units,which are further bridged by C-H…O interactions to give a 3D supramolecular network.The introduction of tpt produces different framework for 2 that comprises a dinuclear and a mononuclear Cu（Ⅱ） building units,which are further bridged together by tci;and tpt ligands to give a 4-connected 2D topological net.Adjacent 2D layers are packed together via C-H…O interactions and π…π stacking interactions to form a 3D supramolecular structure.In addition,the luminescent properties and the solid-state UV-vis spectra of 1 and 2 were explored.Furthermore,antiferromagnetic exchange interactions were unveiled in the Cu;（COO）;units of 1.