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- W4328109499 startingPage "111241" @default.
- W4328109499 abstract "Herein, three new fluorostyrylindazoles bearing one, three and five fluorine atoms (FPIZ, TFPIZ and PFPIZ) have been synthesized. Interestingly, the crystal of PFPIZ bent back away from the lighht source at the initial stage of 365 nm light irradiation, and then it showed phototropic bending when prolong the irradiation time without changing the irradiation direction. It was found that the photo-induced [2 + 2] cycloaddition could lead to the expansion and contraction of the unit cell in different directions, and in turn trigger the crystal to exhibit macroscopic mechanical moving. Meanwhile, the photochemical reaction was reasonable for the photochromism of the PFPIZ, which is helpful for the visual observation of the photomechanical effects. For instance, the fluorescence of the crystals of PFPIZ was changed from blue-purple to white under 365 nm irradiation. Besides, TFA (trifluoroacetic acid) could quench the emission of the synthesized fluorostyrylindazoles to different degree in solutions as well as in the films. The acidochromism of the styrylindazole derivatives was originated from the protonation of indazole by acid. The design of multi-stimuli response crystalline materials would be helpful for the fabrication of intelligent photoactuators and fluorescence sensors." @default.
- W4328109499 created "2023-03-22" @default.
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- W4328109499 date "2023-07-01" @default.
- W4328109499 modified "2023-09-25" @default.
- W4328109499 title "Photoactuation, photochromism and acidochromism of styrylindazole-based crystalline materials" @default.
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- W4328109499 doi "https://doi.org/10.1016/j.dyepig.2023.111241" @default.
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