Fig. 7: The control of photochromic fluorescence ranges using a series of mixed solvents (DMSO/DCB) and photowriting and self-erasing behavior of PMC-PMMA film.
From: An ultrawide-range photochromic molecular fluorescence emitter
a The CIE 1931 chromaticity diagram of PMC and PSP in the DMSO/DCB solvent with different DMSO fractions. b Fluorescence image of the photoswitch in the DMSO/DCB solvent with different DMSO fractions. The top ones are PMC and bottom ones are PSP. c, d The illustration, and digital images of anti-counterfeiting patterns of PMC or PSP in mixed solvents. e, f Fluorescence and UV-Vis spectra for photoisomerization and thermal relaxation process of PMC-PMMA film. The insert spectra are thermal relaxation dynamics of absorption at 479 nm of the film and CIE 1931 diagram, respectively. g, h The illustration, and digital images for photowriting, full light-exposure, and self-erasing process of the film.
