Syntheses And Structures Of Coordination Polymers Based On A New Schiff Base Ligand

In this work,four coordination polymers,namely [Fe₂（L）（OH）（DMF）]·[OH]（1）,[（CH₃）₂NH₂]₂·[Mn₃（L）₂（H₂O）₄]·2DMF（2）,[Ni₂L（teta）]·2DMF·H₂O（3）and [（CH₃）₂NH₂]·[CuHL]·H₂O（4）,based on a novel dicarboxyl-functionalized Schiff base ligand,1,2-cyclohexanediamino-N,N’-bis(^3-methoxy-5-p-carboxyphenyl-diazo-salicylidene)（H₄L）and neutral ligand 5,7,7,12,14,1^4-hexamethyl-1,4,8,11-tetraazacylotetradecane（teta）,have been synthesized.In complex 1,L^4-anions linked Fe³⁺ ions into a unique binuclear double chain.Hydrogen bonds connect the chains into a two dimensional supramolecular layer.In complex 2,Mn²⁺ cations are bridged by L^4-anions to form a layer.In complex 3,Ni²⁺ ions are held by L^4-anions and teta ligands to yield a chain.In complex 4,HL^3-anions are linked Cu²⁺ ions to frunish a dimer.The dimers are further linked by hydrogen bonds to form a supramolecular layer.The complexes were characterized by elemental analysis,infrared spectroscopy,X-ray powder diffraction and UV-vis spectroscopy.In addition,the adsorption property on dyes of complex 2 has been studied.The result shows that 2 has efficient adsorptions on methylene blue,gold orange II and neutral red.