Synthesis And Photoluminescence Of Supramolecular Functional Materials

Organic materials with thermal activation delayed fluorescence(TADF)and aggregation-induced fluorescence(AEE)are functional materials with broad application prospects,and research in recent years has developed rapidly.In 2001 and 2012,Academician Tang Benzhong and Professor Adachi made pioneering research on aggregation-induced fluorescence and thermal activated delayed fluoreseence,respectively,which attracted widespread attention in the scientific community.This paper will focus on the design and preparation of supramolecular coordination polymer functional materials.In particular,supramolecular polymers have been studied in the field of aggregation-induced fluorescent functional materials and thennally activated delayed fluorescent functional materials.?.By applying two donor-acceptor motif molecules,5,10-di(pyridin-4-yl)-5,10-dihydrophenazine(L1)and10,10'-di(pyridin-3-yl)-10H,10'H-9,9'-spiroacridine(L2),as ligands and CuI/AgCF3CO2 as metal salt,we synthesized three coordination polymers,namely,{Cu4(L1)2I4}(CP1),{Cu(L2)I·CHCl3}(CP2)and {Ag(L2)CO2CF3·CHCl3}(CP3).X-ray crystallographic analysis revealed that three coordination polymers all feature one-dimensional(1-D)linear chains which are consisting of molecular boxlike units-.In comparison with low photoluminescence quantum yield(PLQ Y)of two ligands,three coordination polymers,CPI,CP2 and CP3,present more intense photoluminescence with PLQY of 15%,46%and 34%at room temperature respectively.The PL emission of CPI and CP2 at room temperature could be attributed to the fast phosphorescence with lifetime both around 5?s due to effective intersystem crossing(ISC).Whilst,it is worth noting that CP3 exhibit thermally activated delayed fluorescence(TADF)emission at room temperature.?.We designed and synthesized a series of novel fulvene-boron complexes,which are a novel class of organic acceptors.Experiments have shown that Complexes L3 with a donor-acceptor-donor(D-A-D)structure has significant aggregation-induced fluorescence(AIE)properties in the eomplexes we designed and synthesized.