Metal-Organic Complexes Based On Cinnamic Acid Derivative Ligands And C₃ Symmetry Ligands:Synthesis,Structure And Performance Studies

Metal Organic framework materials?Metal-Organic Frameworks,MOFs?as a kind of porous material,the gas adsorption and separation,heterogeneous catalysis,photo electromagnetic properties showed a good application prospect,has attracted much interest among researchers at home and abroad.In this paper,based on the theory of crystal engineering,the preparation of novel structure,good performance of MOFs,for the purpose of chose 3-hydroxy cinnamic acid?L1?,4-hydroxy cinnamic acid?L2?and a carboxylic acid ligands L3[4,4',4"-?minus1,3,5-triazine-2-triyltrisulfanediyl?tribenzoic acid]as the main ligand,and 15 complexes or coordination polymers were successfully synthesized by using different nitrogen ligands as complementary.All of these complexes were tested by single crystal X-ray diffraction,IR and elemental analysis,and the related thermal properties and fluorescence were further studied.The main work achievements are as follows:1.With 3-hydroxycinnamic acid?L1?as the first ligand,one metal complex was successfully prepared,with the following formula:La?L1?3?2,2'-bipy??1?.2.Five metal complexes were prepared with 4-hydroxycinnamic acid?L2?as the first ligand.The molecular formula was as follows:[Zn?L2?2?4,4'-bipy??H20?2]n?2?,ZnCl?L2??2,2'-bipy?·3H2O?3?,[Zn?4,4'-bipy?2?H2O?4]n·2nL2?4?,Ln?L2?3?H20?2[Ln = Dy?5?,Y?6?]3.Nine metal coordination polymers were successfully prepared with C₃ symmetrical carboxylic acid ligand L3 as the first ligand.The molecular formula was as follows:[Co3?L3?2?C5NH5?]n?7?[Cd3?L3?2?DMA?2?C12H10N2?]n·2n?C2H3N??8?[LnL3?H20?2]n[Ln = Dy?9?,Pr?10?,Gd?11?,La?12?,Nd?13?,Sm?14?,Tb?15?]4.Of complexes?1??2??4??5?and?6?the thermogravimetric analysis,and the complexes?9???15?for the X-ray powder diffraction analysis?PXRD?and the complexes?2?,complexes?9???15?the fluorescence performance tests,showed a strong solid fluorescence emission.Overall,these complexes are synthesized by a solvothermal method,introduces their structure,crystal structure and their description of some compounds were PXRD analysis,thermogravimetric analysis and fluorescence performance test,PXRD test and calculation of fitting of them,and analyzes their weight loss and fluorescence.