This paper reports on durable and nearly temperature-independent (at 298-328 K) T-type photochromism of colloidal Cu-doped ZnS nanocrystals (NCs). The color NC powder changes from pale yellow to dark gray by UV light irradiation, the back a time scale several tens seconds minutes after stopping while decoloration reaction is accelerated submillisecond in solutions. much faster than those conven...

A recently reported protolytic gating effect on the ring closing reaction of an oligo(phenylene ethynylene) (OPE) embedded difurylperfluorocyclopentene (S) with a dimethylaminophenyl chain link in each of the side arms, was quantitatively analyzed in detail. The reaction system (So, SoH(+), SoH2(2+), Sc, ScH(+), ScH2(2+)) comprising three protolytic forms in both open and closed configuration, ...

A photochromic supramolecular nanofibre, composed of a diarylethene derivative, exhibits hydrodynamic alignment upon exposure to the audible sound. The aligned nanofibre outputs linear dichroism (LD), whose wavelength region can be switched reversibly with UV and visible light.

Two new photochromic compounds bearing a dithienylethene unit have been designed, synthesized, and well characterized. The first contains platinum dialkynyl moiety whereas the second bears simple phenyl-dimethylamino fragment. Both demonstrated an excellent behavior. This efficient photochromism is springboard for significant photomodulation of second-order nonlinear optical properties, determi...