Fig. 5: Characterization of the dynamics of photoisomerization and thermal relaxation, and the time-dependent fluorescence chromism of PMC photoswitch in CHCl3 (25 mW cm–2, 25 °C unless mentioned).
From: An ultrawide-range photochromic molecular fluorescence emitter
a, b Absorbance at 500 nm and emission at 400 nm/640 nm for 5 cycles of time-dependent photoisomerization and thermal relaxation process. The yellow areas represent photoisomerization process, and the blue areas represents thermal relaxation process. The rate constant of photoisomerization process k2 is (0.29 ± 0.03) s–1, and rate constant of thermal relaxation process k3 is (223.10 ± 5.59) s–1 (see Supplementary Tables 3 and 4). c Half-life of thermal relaxation process and photoisomerization extent of light irradiation and thermal relaxation process through time-dependent dynamic UV-Vis absorption and fluorescence emission spectra. n = 5 independent experiments, with the bar data indicating mean ± SD. d Time-dependent 3D-fluorescence spectra of thermal relaxation process. e, f The CIE 1931 chromaticity diagram, and fluorescence images of thermal relaxation process at certain time including 0 min (PSP state), 1 min, 5 min, 15 min, 30 min, 60 min, 90 min, 120 min, and 300 min.
