Most luminescent materials are greatly limited in their applications due to strong fluorescence quenching in solid state or high doping concentration.Therefore,it is particularly important to research and develop new materi-als that can exhibit excellent luminescent properties in aggregated states.Four compounds based on the thiophene ethylene skeleton structure,Br-thph,Br-2thph,Thph-czm,and 2Thph-czm were synthesized in this paper.The photophysical properties of this type of compound have been studied in detail in low concentration solutions,aggre-gates,and solid films.The results showed that all four compounds exhibited significant aggregation induced lumines-cence properties,with weak luminescence in low concentration solutions,but exhibited strong luminescence with in-creasing concentration or in aggregated states.Among them,compounds Br-thph and Br-2thph exhibit 410 and 180 times enhanced luminescence compared to low concentration solutions,while Thph-czm and 2Thh-czm exhibit 78 and 40 times enhanced luminescence,respectively.Moreover,all four compounds exhibited significant mechanoflu-orochromic effects and exhibited a certain spectral blue shift.Through preliminary exploration of the photophysical properties of these compounds,it is indicated that these novel thiophene ethylene derivatives have potential applica-tion value in anti-counterfeiting and display fields.
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