C₃ Symmetry Electron-deficient Compound To Build A Star System Research MOF

the metal- organic framework materials has attracted more and more attention,Because of the potential value in many fields such as catalysts, separation, gas storage, optical, electrical and magnetic materials and other aspects.In this paper, we have synthesized a new type of electron-deficient C₃ symmetry star compound by Bromoiodobenzene and Borate benzene.The Suzuki and Sonogashira, ester hydrolysis, We have designed and synthesised of a star structure pyridine / carboxylic acid functional tridentate ligand, and then used solvothermal successfully built a series of structures relatively new, relatively unique properties metal-organic framework materials.We have used the scanning electron microscopy（SEM） and transmission electron microscopy（TEM）, and other characterization techniques to determine the structures of these compounds, suspect there may be have good gas adsorption.This paper is divided into three parts:The synthesis and characterization of ligand. We have used the 5-bromo-2-iodo-pyrimidine as a starting material, synthesized two isomeric structure having a tridentate ligand compound 8and 9.We have characterized a series of moleculars of synthesised by nuclear magnetic resonance（NMR）, MADLI-TOF mass, UV-visible spectrophotometer（UV） and other means.Second,Synthesis and Characterization of Organometallic framework materials. We use Compound 8 and 9 as a ligand to the preparation of metal organic framework materials.We use the scanning electron microscope（SEM）, transmission electron microscopy（TEM）, scanning electron microscopy（ESEM） to test the metal-organic framework materials of some basic physical properties, the results show that the materials has not only shape the rules, and has crystallography feature.In order to compare the performance of compound 8, we have done some characterization results of the compound 9 which showed really good symmetricalthree-carboxylic acid ligands than asymmetric performance.Third,with the synthesis and characterization. We investigate compounds 8 and 9 with a bit of silverat at room temperature. We use UV, fluorescence to characterize the resulting complexes.From the results of the characterization of the pyrimidine ring nitrogen atom on the ligand and the carboxylic acid easily with silver ions and ligands influence the spatial structure and optical characteristics of the compound, and by scanning electron（SEM） and transmission electron microscopy（TEM） of trifluoro ligand mesylate were characterized by titration.