| Metal-Organic Frameworks?MOFs?,as a new porous material,not only possess extremely high surface areas,tunable pore size and recoverability,as well as a wide range of accessible catalytic sites,but also could be introduced into many active sites by means of pre-functionalization and post-synthetic modification.So,metal-organic frameworks developed rapidly in catalytic field in the recent years,which is applied to photocatalysis,electrocatalysis and many heterogeneous catalysts.Tandem reactions and multicomponent reaction are in one pot,which could reduce the use of chemicals,mitigate the generation of pollutants,and shorten reaction time.They are economical,efficient and environment-friendly chemical methods,and have been attracting widespread research interests.In this paper,two new kinds of metal-organic frameworks were synthesized by solvothermal reactions,and their structure,function and catalytic performance were studied.The full paper is divided into four chapters:In the first chapter,we first introduced the research background of MOFs materials and the development of the current situation,and then introduced the MOFs materials research progress in the field of catalysis,series mainly catalytic reaction progress.In the second chapter,a series of 12-connected hexanuclear Ln?Ln=Yb,Dy and Sm?clusters-based MOFs incorporating[Ln6??3-OH?8?COO-?12]and an amino-functionalized ligand?2-amino-benzenedicarboxylate,BDC-NH2?have been synthesizedbysolvothermalreactionswiththeformula[?CH3?2NH2]2[Ln6??3-OH?8?BDC-NH2?6?H2O?6]??solv?x?Ln=Yb?1?,Dy?2?and Sm?3??.These compounds show high chemical stability and generic thermal stability in common organic solvents and water with pH values ranging from 2-12.Due to the existence of-NH2 groups,they show high adsorption capacity of CO2.More strikingly,the Ln clusters afford Lewis acid sites and ligands offer Br?nsted base sites,making them as highly efficient bifunctional catalysts for one-pot tandem deacetalization-Knoevenagel condensation reaction.In the third chapter,we used ligand 4,4',4''-s-triazine-2,4,6-tribenzoic acid?H3TATB?and indium ions through solvothermal reactions to synthesize a coordination polymer with the formula[In?TATB?2?HCOO?3?DMF?3]·2DMF·H2O?4?with double interpenetrating structure,and then introduced its catalytic performance of Biginelli reaction.In the fourth chapter,we summarize the work of the synthesized compounds,tandem reactions and multicomponent reactions,which provides the basis for the application of the metal-organic frameworks materials in tandem reactions and multicomponent reactions. |
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