Fluorescence diarylethene derivatives

Another fluorescent diarylethene derivative is compound 22, in which dithienylethene moieties are connected to fluorescent bis(phenylethynyl)anthracene. When the dithienylethene unit converted to the closed-ring isomer upon irradiation with 313 nm light, the fluorescence quantum yield decreased from... 

T. Fukaminato, T. Sasaki, T. Kawai, N. Tamai, M. Me, Digital photoswitching of fluorescence based on the photochromism of diarylethene derivatives at a single-molecule level, J. Am. Chem. Soc, 126, 14843-14849... 

Some selected examples of 1,2-diarylethenes were shown in this review. Miyasaka and Irie et al. revealed the three-photon cyclization and two-photon cycloreversion of diarylethens (223) by a near-infrared femtosecond laser pulse at 1.28 pm. They also found single-molecule fluorescence photoswitching of a diarylethene-perylenebisimide dyad (225)." " Photomechanical effects of two-component cocrystal (226) composed of 1,2-diarylethene derivative and perfluoronaphthalene or hydrogen-bonded diarylethene-imidazoline crystalline (227) were examined. A variety of photochromic reactions of 1,2-diarylethenes in crystalline states were reported by Iiie et al. ... 

A number of photochromic systems have been extensively investigated that undergo cis-trans isomerization (indigos, azo compounds) cleavage (spiropyrans), electrocyclic processes (fulgides, 1,2-diarylethenes) [8.229, 8.244, 8.245], For instance, cis-trans isomerization of a thio-indigo derivative allows the reading of pyrene excimer or monomer fluorescence [8.246]. The 1,2-dithienylethene system presents particularly attractive interconversion properties by photoreversible cyc-litation [8.245],... 

---