Fig. 4
a An SP small molecule that shows photoinduced solid–liquid transitions and b the details. c Linear statistical copolymers containing SP with photoswitchable Tgs. d A fluorescent hydrazone and e its photoinduced crystal–isotropic transitions (left: fluorescence images, right: polarizing images). Reproduced with permission from Shao et al. [186]. Copyright 2018, American Chemical Society. f, g Acyclic and cyclic hydrazones that change their Tms upon light exposure. h Linear homopolymers of hydrazone that show photoinduced Tg changes. i Formation and disappearance of microfibrils on DAE crystals via photoinduced crystal-to-liquid transitions. Reproduced with permission from Uchida et al. [191]. Copyright 2006, John Wiley and Sons. j Photoinduced crystal-to-liquid transition of an asymmetric heteroaromatic 1,2-diketone. Reproduced with permission from Komura et al. [193]. Copyright 2023, the Royal Society of Chemistry
