Functional-group-regulated stimuli-responsive banana-shaped α-cyanostilbene derivatives: Dual-state emission, AIEE, acidochromism and their applications in anti-counterfeiting, fingerprint recognition and OLEDs

The research of structure-property relationships is of great significance for exploring the luminescent mechanism, the design of functional materials with desired photoelectric properties and facilitating practical applications. In this paper, a series of cyanostilbene derivatives (TS-R) with different functional groups were synthesized by one step under mild conditions and characterized. Their photoelectric properties and structure-property relationships have been researched. The results indicate that TS-R have solution and solid dual-state emission (DSE) property, aggregation-induced emission enhancement (AIEE) effect, solvatochromism behavior and stimuli-responsive fluorescence characteristic for acid. The photoelectric properties can be changed by introducing different functional groups at the molecular same position of TS-R. The applications of TS-R were also investigated. The results indicate that TS-R can be used in fluorescent anti-counterfeiting, fingerprint recognition and light emitting diode (LED).