Switching properties of fluorescent photochromic poly(methyl methacrylate) with spironaphthoxazine and D-π-A type pyran-based fluorescent dye

Fluorescent photochromic poly(methyl methacrylate) (PMMA) with spironaphthoxazine (SPO) and D-π-A type pyran-base fluorescent dye as a fluorophore was synthesized by typical free radical copolymerization. The poly(MMA-co-SPO-co-fluorophore) in both solution and solid film exhibited excellent photoregulated fluorescence switching behavior and reversible modulation of fluorescence intensity using alternating irradiation with UV and visible light. The poly(MMA-co-SPO-co-fluorophore) also showed viscosity and conductivity switching behaviors along with photoresponse.

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► Fluorescent photochromic poly(NIPAM-co-SPO-co-D-π-A dye) prepared by radical polymerization.
► Both solution and film exhibited excellent photoregulated fluorescence switching with UV/vis.
► Reversible modulation of photochromism and fluorescence was achieved by irradiation with UV/vis.
► Polymer showed viscosity and conductivity switching along with photoresponse.