Preparation Of Styrene-based Aggregation-induced Emission Materials And Their Fluorescence Detection Of Nitro Explosive

Today’s Society,Explosives and human production are closely linked,they are widely used in the industrial field.Among all kinds of explosives,nitroaromatics explosives(NACs)are widely used in military operations,construction blasting and manufacturing.But while NACs brings convenience to production,it also brings shadows.NACs is the tool of choice for many terrorists to commit crimes,which endangers the safety of human life and property.After using NACs,its residues can also pollute the environment,so the identification and detection of NACs has been a hot research topic in the world.Scientists have developed a large number of detection methods for NACs,among which fluorescence-based probe recognition method is regarded by many researchers.This is because the fluorescence probe has the advantages of high sensitivity,fast response,maneuverability and selective recognition.Then,on the basis of fluorescence detection,the probe with aggregation-induced luminescence(AIE)was further developed.Because NACs are electron deficiency and AIEgens are mostly electron-rich compounds,they can respond to each other to quench the AIEGENS fluorescence and detect NACs with this rapid,sensitive response.In this paper,we first synthesized compounds EB1-4 with different numbers of tristyryl and tetrastyryl as terminal groups using ethyl benzoate as the backbone,these compounds were characterized by UV absorption spectra and fluorescence emission spectra,and proved to have excellent AIE properties.Through the theoretical calculation of the density function,it is proved that the main mechanism of AIE phenomenon is intramolecular rotation arrest.These compounds were then made into fluorescence sensors for NACs recognition,and the fluorescence titration experiments showed that they had good sensing performance for all six nitro aromaticity.Finally,self-assembly method combined with paper-based composites was used to make low-cost fiber recognition test paper for fast recognition of NACs.Secondly,the compound L1-2 with AIE effect was synthesized by using phenimidazole as the framework and styryl as the terminal group.Then through the theoretical calculation of the density function,it is proved that the AIE phenomenon is caused by the combination of intramolecular vibration and intramolecular rotation.These compounds were then made into fluorescent probes,and the fluorescence titration experiments showed that they had good sensing properties for all aromaticity of nitro group.Finally,L1-2 was attached to paper base to make low-cost fiber recognition test paper for fast recognition of NACs.