the assembly can be reversibly switched by alternating UV/visible light irradiation. Meanwhile, the morphology of the coassembly of 12·DTE changed to film from original pieces of gel 1 in ethyl acetate. When 12·DTE was irradiated by UV light, the film morphology was converted into aggregated flakes. Moreover, the surfacewettability of the complex can also be switched by light irradiation. The photochromic