Supramolecular Assembly And Highly Efficient Circularly Polarized Lu Minescence Driven By Arene-perfluoroarene Interaction

In the research field of circularly polarized lu minescence(CPL),two important evaluation indicators are the lu minescence dissy mMetry factor(glum)and quantum efficiency(?PL).Chiral organic small molecules have the advantages of high fluorescence quantum efficiency and adjustable emission wavelength and have become the first choice for the study of circular polarized lu minescence.However,organic materials usually have a low glum value,limiting their development and application.In this thesis,we have studied the strategies for achieving highly efficient CPL active materials.Chiral polycyclic aromatic hydrocarbo ns(PAHs)and a variety of fluorinated aromatic hydrocarbon molecules could form co-assembled supramolecular systems driving by arene-perfluoroarene(AP)interactio ns,enabling excellent circularly polarized lu minescent materials.The specific research content is as follows:(1)A variety fluorinated aromatic hydrocarbon molecules octafluoronaphthalene(OFN)?octafluorobipheny(BFN)?and tris(pentafluorophenyl)borane(TiPB)and chiral organic molecule R/S-Py are used to co nstruct AP complexes.And successfully co nstructed arene-perfluoroarene interaction in colloidal suspe nsion liquid and amorphous film state octafluoronaphthalene and R/S-Py to achieve ground state and excited state chiral properties relative to the single component R/S-Py state This is an order of magnitude improvement,and at the same time a higher efficiency of fluorescence emission is achieved.At the same time,detailed morphology and spectroscopic characterization of the formation process of aromatics-perfluoroaromatics interaction were carried out,and the chiral organic molecules R/S-Py of octafluorobiphenyl and tris(pentafluorophenyl)borane were also studied.Influence on the nature of chirality.(2)Co-assembled supramolecular systems based on anthracenyl chiral molecules R/S-An and R/S-NAn and octafluoronaphthalene was studied,and large 1u minescence dissy mMetry factor and lu minescence quantum efficiency were obtained.In the arene-perfluoroarene interaction system co nstructed by R/S-An and octafluoronaphthalene,the chiroptical properties and the 1u minescence quantum efficiency are simultaneously improved.The morphology and spectral changes of the co nstructed R/S-An and octafluoronaphthalene complexes were systematically studied.In conclusion,it is a general strategy to co nstruct highly efficient circularly polarized lu minescence materials driven by arene-perfluoroarene interactio ns.