Fluorescence Properties Of Luminescence Metal-Organic Framework Constructed By Insertion Of Pyridine-Amide Tripod Ligands And Doping Of Lanthanide Metal Ions

Metal-Organic Framework(MOF)materials,as emerging materials in the past 30 years,have attracted the attention of many researchers since their discovery with advantages such as large specific surface area,porosity,and strong designability.Luminous Metal-Organic Framework(LMOF)is a type of MOF material known for their luminescent properties,at the same time,LMOF material has the advantages of MOF material,such as high design flexibility,enduring porosity,and abundant host-guest interactions within their channels.As a result,LMOF has emerged as a prominent area of research in the field of luminescent materials.In this paper,we designed a bifunctional organic building unit precursor of pyridine-amide tripod on ethyl triphthalate skeleton,and hydrolyzed ester group to obtain bifunctional organic building unit.The structure and luminescence properties of lanthanide complexes of the bifunctional precursor were studied.Based on this,the bifunctional organic building unit was further assembled into the LIFM-28(LIFM,Lehn Institute of Functional Material)material matrix by the strategy of post-synthesis modification,and then reacted with lanthanide metal ions to obtain the corresponding LMOF material.Subsequently,we systematically studied the influence of channel environment changes on the luminescence properties of the tripod rare earth complex in LIFM-28.By adjusting the content of lanthanide metal ions,a case of LMOF material close to white light was obtained.At the same time,the LMOF material assembled with europium has a fluorescence opening effect on picric acid.The study shows that the LMOF material has high sensitivity and good anti-interference for the detection of picric acid,which is a good picric acid detection material.