Construction And Performance Of Diphenylamine-based Metal- Organic Frameworks Construction And Performance Of Diphenylamine-based Metal- Organic Frameworks

Nitrogen-containing compounds have always been important compounds in the fields of medicine,agriculture and materials,so the construction of carbon-nitrogen bonds is very important in organic synthesis.In particular,it is an important subject to explore a synthesis scheme with mild conditions and green economy.Metal-Organic Frameworks?MOFs?are considered to be a new class of porous crystalline materials.Compared with traditional inorganic porous materials,this type of material has excellent porosity,high specific surface area and dense metal sites.It has excellent selectivity and adjustability and can be recycled.It can be used as an excellent heterogeneous catalyst.So it attracted the attention of many chemists.Based on these ideas,two new MOFs were constructed with diphenylamine tetracarboxylic acid ligand,and their structures and properties were explored and used as catalysts to efficiently catalyze the C-N coupling reaction.?1?A new type of Zn-TDPC material was constructed by solvothermal method,using Diphenylamine tetracarboxylic acid as the organic ligand and Zn²⁺.In the a-axis direction,the MOFs have quadrangular Channels of 13.08×6.28?² and 11.42×3.33?²,respectively,and the coordinated unsaturated zinc ion sites are evenly distributed in the Channels.And through single crystal diffraction analysis,elemental analysis test,powder X-ray diffraction,infrared spectroscopy,ultraviolet spectroscopy and thermogravimetric analysis to characterize the structure and properties of Zn-TDPC.The Zn-TDPC is easy to synthesize and has high physicochemical stability.By exploring the physical and chemical properties of Zn-TDPC,the potential application value of the MOFs in the chemical field can be found.?2?A new Cu-TDPC material was constructed by solvothermal method using copper ions and Diphenylamine tetracarboxylic acid ligands,which are highly used in C-N coupling reaction.Observed along the a-axis,the MOFs contain triangular Channels with dimensions8.58×11.86×11.65?² and open Lewis acid catalytic centers.It is used as a heterogeneous catalyst in the C-N coupling reaction,and a good catalytic effect is achieved.At the same time,the reaction conditions were optimized.Phenylboronic acid was used as the arylboronic acid,N,N-dimethylformamide was used as the reaction solvent and the reaction was best at a certain temperature,and the substrate range was expanded.