Synthesis And Properties Of Metal-organic Framework Materials With Thiophene Carboxylic Acid Ligands

Metal-organic frameworks(MOFs)are a new class of porous materials,MOFs have attracted tremendous research are interested in both academia and industry due to their structural diversity,flexibility and tailorability,not only because of exceptionally artistic architectures of this materials,but also because of their justifiably enormous potential for many practical applications.Especially in the application of the catalytic received intense attention.Because it exist catalytic active sites of uniform distribution and large porosity,therefore to ensure that each of the active site can contact.These excellent properties and extensive applications are mostly attributed to the distinct structure and composition of this material.Organic carboxylate ligands have been widely used in synthesizing porous MOFs or magnetic materials with esthetical topologies and unique properties.Therefore,MOFs are very good heterogeneous catalysts.Design and synthesis of functional organic metal framework have aroused people's interest,the design of organic ligand to build a framework of functional metal organic material has an important decisive role.The design of the organic ligands containing functional sites provides a good application value for metal organic frameworks.The introduction of S or thiophene in metal organic framework material is a promising application platform.Using thiophene linear ligand synthesis of metal organic skeleton contains nudity S site,which not only selectively identify metal ions,but also to form a coordination bond,which can choose to adsorb metal ions.Therefore,this paper contain the designs and synthesises of two organic ligands containing thiophene,and synthesize a series of metal organic frameworks with rare earth clusters.The method,structure,characterization and application of this material were studied in detail for the metal ion inspection and adsorption and other properties of this material.In the first chapter,we introduced the development of metal-organic frameworks and the applications of MOFs in various fields,such as heterogeneous catalysis,luminescence,adsorption and separation,and the significance and the progress of this paper.In the second chapter,four series of rare metal organic frameworks {[Ln2L6DMF4]?1.5H2O}n(1)(Ln =Eu(?)(1),Y(?)(2),Dy(?)(3),Yb(?)(4)),has been solventhermally synthesized by Y(?),Er(?),Dy(?),Yb(?)ions and an thieno[2,3-b]thiophene-2,5-dicarboxylic acid.Complexes exhibit triangular channels,The structure and properties of these four complexes were studied.The results showed that the four complexes were isomeric,In particular,the(1)can highly selective sensing of nitrobenzene and Al3+ ions,and the(1)was studied and discussed in detail.In the third chapter,we report a new thiophene-containing europium MOF [Er2(SBDC)3(H2O)2]�4H2O(5)composed of lanthanide metal ions and benzo[1,2-b:4,5-b']dithiophene-2,6-dicarboxylic acid.The compounds exhibit excellent catalytic activities toward the cyanosilylation reaction under solvent-free conditions.In addition,the exposed S-site is contained in the complex pore.The [Er2(SBDC)3(H2O)2]�4H2O reveals high selective adsorption for Cu2+ ions.Finally,we have summarized the structures and functional properties of the five Metal organic frameworks.The research provided a new ideal for the construction and design of metal-organic frameworks.Which provides a new way for the future development of metal organic framework materials.The prospect of MOF application is forecasted.