一种基于硝基偶氮双炔囊泡及α-环糊精混合体系的光响应颜色传感器的制备与表征

Under UV irradiation, ordered diacetylene molecules can be polymerized. Generally speaking, optical absorption in poly diacetylene(PDA) occurs via π to π* absorption within the linearπ- conjugated polymer backbone. PDA exhibits intense chromatic switch from blue to red in response to external stimuli including temperature, pH, ions, solvent, stress or ligand interaction. However, most of these chromatic responses are irreversible, and limit their application in sensing. In this paper, photo-controlled inclusion and exclusion reaction of azobenzene-containing polydiacetylene vesicles with a-cyclodextrin were used to act as driving force to induce chromatic transition of PDA vesicles, which provided a novel model system that combines photochemistry and host–guest chemistry for a photo-stimulus-responsive vesicle.