Syntheses And Properties Of Coordination Polymers Based On A Resorcin[4]Arene Modified By Pyridylthio Groups

Herein,we prepared a functional resorcin[4]arene ligand modified by pyridylthio groups(L).Through the assembly of cadmium and copper salts with L,three distinctive coordination polymers[Cu₂L₂]?0.5CH₃OH?1.5H₂O?2CN(1),[Cd Cl₂L]?5DMF?2CH₃OH?2H₂O(2)and[Cd₂L(bdc)₂(DMF)]?2DMF?3CH₃OH?H₂O(3)have been solvothermally synthesized(H₂bdc=p-phthalic acid).Three coordination polymers were characterized by TGA,FT-IR,PXRD and element analyses and their crystal structure were determined by X-ray single crystal diffraction.Among them,1 exhibits a 3D structure linked by Cu(?)and L ligands,while 2 and3 are both charming layers.The bowl-shaped ligands of each layer in 2 are inserted into two adjacent layers,resulting in a interlocked 3D supramolecular structure.1 displays efficient and selective catalytic performance for azide-alkyne cycloaddition(AAC)reactions owing to its lewis acid sites.The results show that 1 exhibits well heterogeneous catalytic capability for AAC reaction in the formation of 1,2,3-triazoles as well as?-OH-1,2,3-triazoles.In addition,the catalytic performance of 2 on solvent-free Knoevenagel condensation reaction was studied due to its large porosity.Remarkably,as heterogeneous catalysts,1 and 2 could be recycled by preserving the catalytic capability and structural integrity.