Study On The Method Of Constructing Circularly Polarized Luminescent Materials

Circularly polarized luminescence?CPL?materials had widely application in 3D display,information storage,molecular photo-switch,CPL laser and CPL sensor due to the different intensity of left-circularly polarized light and right-circularly polarized light.Therefore,it is of great significance to study the construction of CPL materials with high g_lum values by simple and effective methods.The basic method of CPL material construction is to combine chiral groups with luminescent groups.Herein,three ways for building circularly polarized luminescent materials were designed,which were constructed based on covalent bond,coordination bond and co-assembly.The specific contents are as follows:?1?The C₃ symmetric molecule 1,3,5-phenyl-triamide derivative,which contained three benzoic acid moieties,as the precursor,the supramolecular chiral btaba-assembly was obtained in a completely achiral system by vortex agitation self-assembly?VAA?.With btaba-assembly as the chiral center,we designed two co-assembly strategies to obtain CPL active optical switch materials without any chiral precursors.The supramolecular optical switch material not only has good reversible property,but also has a high glum value(10^-2).?2?The Zr-CMOF-1 was designed synthesized by chiral ligand R-4 and Zr Cl₄,PXRD measurewas tested to verified its structure.Cationic dye acridine orange and DASPI were doped into Zr-CMOF-1.Zr-CMOF-1 and DASPI@Zr-CMOF-1 exhibited CPL signals,and g_lum value reached10^-3 level.?3??S,S?-4TA,which was synthesised based on tartaric acid derivative,and 2,4,6-triformyl triphenylenol induced by S-PEA were designed as chiral ligands to respectively formed Covalent Organic Frameworks with 2NH₂-DPA via hydrothermal method.However,the result of XRD and BET measure exhibited that neither COFs were not obtained,while some polymers with poor porous property were obtained,and both of them showed no CPL signals.