Photophysical properties and photostability of novel symmetric polycyclicphenazine-type fluorescent dyes and the dye-doped films

Novel symmetric polycyclicphenazine-type fluorescent dyes have been synthesized and characterized in solution and in polymer films. The dyes exhibited two strong absorption bands at around 365–428 nm and 519–567 nm and an intense fluorescence band at around 560–600 nm (Ф = 0.70–0.87) in 1,4-dioxane. The dye-doped polymer films showed excellent wavelength conversion function that efficiently convert ultraviolet and yellow lights into red light (Ф = 0.61–0.92). Moreover, the photostability of the dye-doped PS, PMMA, and PLA films has been investigated.

► Structural isomers of new phenazine-type fluorescent dyes have been synthesized.
► These dyes absorbed at around 380 nm and 530 nm and emitted at around 560–600 nm.
► The dye-doped polymer films showed an efficient fluorescence and good photostability.