Two novel photochromic bisthienylethene derivatives BTE-NA1 and BTE-NA2 with a six-membered aryl ring of naphthalimide fluorescent moiety as the center ethene bridging unit were synthesized and fully characterized by 1H NMR, 13C NMR, and HRMS. They exhibit considerably high cyclization quantum yield and good fatigue resistance. Interestingly, the fluorescence of BTE-NA1 arising from the naphtha...

We have developed a real-time, dynamic holographic material that exhibits rapid colouration upon irradiation with UV light and successive fast thermal bleaching within tens of milliseconds at room temperature. Photochromic polymer films were prepared by a simple solution-casting method from the benzene solution of the mixture of the photochromic molecule, poly(ethyl acrylate), and poly(phenoxye...

Hackmanites are a family of optically intelligent materials having the ability for reversible photochromism upon X-ray exposure. In article number 2100762, Mika Lastusaari, Tangui Le Bahers and co-workers elucidate how X-rays induce pairing electrons holes to form eraseable color centers in these materials. Understanding their coloration mechanism opens up new possibilities as highly attractive...