Reversible Photocontrol of Surface Wettability between Hydrophilic and Superhydrophobic Surfaces on an Asymmetric Diarylethene Solid Surface

Abstract

By alternate UV and visible light irradiation, reversible topographical changes were observed on a newly synthesized diarylethene microcrystalline surface between the rough crystalline surface of an open-ring isomer and flat eutectic surfaces. The contact angle changes of a water droplet between 80° and 150° and peak intensities changes of the open-ring isomer in XRD patterns within 2 h of repeating cycle were observed. The results indicated that reversibly photogenerated rod-shaped crystals on the surface were produced based on the lattice of the open-ring isomer crystals in the subphase.

Photoinduced reversible switching of porosity in molecular crystals based on star-shaped azobenzene tetramers

“…36). It is likely that the mixture of E-and Z-isomers leads to the formation of an eutectic 16,24,44 . Consequently, the photogenerated material is amorphous, in agreement with XRPD data.…”

An efficient and sensitive chemosensor based on salicylhydrazide for naked-eye and fluorescent detection of Zn2+

“…Among the various photochromic compounds, diarylethenes are gaining increasing attention in the eld of photo-electronics, such as optical memory media and photo-switching devices, due to their high thermal stability, excellent fatigue resistance, and characteristic bistability. 48,49 In the current work, we reported a Zn 2+ chemosensor with a 2,4-dihydroxybenzoyl hydrazine unit. Salicylhydrazide is one of the important members in Schiff base family because it offers a number of possibilities for different modes of coordination with transition metal ions.…”

Switchable and Reversible Superhydrophobic Surfaces: Part One

“…The chemical structure of the diarylethene can also be changed in order to modify the microcrystalline structures. For example, the surface morphology could be modified by sulfonation of the thiophene rings [138].…”