title: Fluorescence and morphology modulation in a photochromic diarylethene self-assembly system.
abstract: Switchable supramolecular self-assemblies on the basis of interaction between melamine group containing photochromic diarylethene unit (DTE) and naphthalimide derivate (1) were designed and fabricated. 1 can gelate several aprotic solvents with different morphologies. The gel turned into partial gel in ethyl acetate with the addition of DTE as a guest molecule. Both the absorption and fluorescence spectra of the assembly can be reversibly switched by alternating UV/visible light irradiation. Meanwhile, the morphology of the coassembly of 1(2)·DTE changed to film from original pieces of gel 1 in ethyl acetate. When 1(2)·DTE was irradiated by UV light, the film morphology was converted into aggregated flakes. Moreover, the surface wettability of the complex can also be switched by light irradiation. The photochromic diarylethene unit is able to modulate the fluorescence and morphology of the assembled system only by virtue of light irradiation. Therefore, these results provide further insights into fluorescence and morphology controlling, especially application in upscale smart responsive materials.
authors: Department of Chemistry, Fudan University, Shanghai, 200433, PR China.
authors: Xinhua
authors: X
authors: Cao
authors: Jing
authors: J
authors: Zhou
authors: Ying
authors: Y
authors: Zou
authors: Mingming
authors: M
authors: Zhang
authors: Xudong
authors: X
authors: Yu
authors: Song
authors: S
authors: Zhang
authors: Tao
authors: T
authors: Yi
authors: Chunhui
authors: C
authors: Huang
mesh_terms: D005030:Ethylenes / Q000737:chemistry* / Q000528:radiation effects; D005453:Fluorescence; D005782:Gels; D008027:Light; D012997:Solvents; D014227:Triazines; D017155:Wettability
chemical_list: D005030:Ethylenes; D005782:Gels; D012997:Solvents; D014227:Triazines; C011907:melamine