Fig. 7: The photoinduced bending behavior of bulk crystals of U-CB[8]-MPyVB in different sizes under varying UV irradiation time at 25 °C in air.

Three kinds of crystals selected for study: Crystal-A (a), Crystal-B (b), and Crystal-C (c). d Schematic diagram of experimental design. e Function fitting result for quantifying photoinduced bending behavior of Crystal-B.