Synthesis And Properties Of Optical Functional Materials Containing Carbazole/Triphenylamine Units

Aromatic amines(triphenylamine,carbazole)are widely used in photoelectric materials,molecular probes,sensors,and rotation units in aggregation-induced luminescence materials because of their excellent luminescence and hole transport properties.For some polar light-emitting molecules containing arylamine groups,they are often capable of acting as a light-emitting layer material,and at the same time they can function as a carrier layer having a transport function.By introducing an electron donating group such as triphenylamine or carbazole onto the AIE molecule,the transport capability of the molecular hole will increase.The reason is that the introduction of an electron donor makes the light emitting molecule in a state rich in electrons,at which time the electrons are more easily oxidized and holes are left in the orbit to facilitate transport.On the other hand,in the Schiff base molecule(-C=N-)structure,the lone pair of electrons on the N atom can be protonated and can be used to develop pH sensors and acid-chromic materials,while designing aromatic amine group pairs.Schiff base compounds undergo structural modifications that both enhance the properties of the molecule and can increase the molecular type of the compound.In this dissertation,arylamine(triphenylamine,carbazole)groups were used as the benzene skeletons,combined with Schiff base molecules and tetraphenylene molecules with AIE properties,a series of luminescent materials with special properties were designed and synthesized,and their photophysical properties were studied.The nature and application prospects were studied in detail.The details are as follows:1.Design and synthesis of three novel AIE molecules containing carbazole units and tetrastyryl units.1H-NMR was used to characterize the synthesis of a series of intermediates and target products.The optical properties of the target product were investigated by means of ultraviolet spectroscopy,fluorescence spectroscopy and other means.It was shown that the compound is a typical AIE-type luminescent material.Irradiating with a 365 nm UV lamp,the compounds M1 and M2 exhibited different color characteristics in different solvents,demonstrating significant intramolecular charge transfer characteristics.Compound M3 does not have this feature.2.Design and synthesis of star Schiff base compounds containing triphenylamine units for hydrogen chloride gas detection.The structures of the compounds were characterized by 1H-NMR,and the response behavior of the compounds to hydrogen chloride gas under different morphologies(solution,net film,and polymer-doped film)was investigated by using UV spectra.The structure shows that all three compounds can undergo protonation with hydrogen chloride under different conditions,and the UV absorption spectrum shows a significant red shift.Therefore,the three compounds have the potential to be applied to chemical sensors.