Synthesis and Properties of Photochromic Diarylethenes Bearing Thiazole Moiety

Photochromism of a new symmetrical diarylethene with a trimethylsilylacetylene unit

“…Relatively, the fluorescence of 1o could be recovered by irradiation with appropriate visible light (λ > 510 nm). Therefore, the fluorescent modulation efficiency of 1o was 30% in hexane.The result showed that the change of the emission intensity of 1o is reversible and 1o is useful for application as the fluorescence switches [14]. …”

“…photoirradiation with 297 nm light when excited at 290 nm. Obviously, the fluorescence of 1o could be modulated by light, reversibly [12][13][14]. Once irradiated with 297 nm light, the emission intensity of 1o would decrease slowly along with the forming of closed-ring isomer [13].…”

Synthesis and Photophysical Properties of 5-N-Arylamino-4-methylthiazoles Obtained from Direct C–H Arylations and Buchwald–Hartwig Aminations of 4-Methylthiazole

“…In particular, the introduction of electron-donating groups to the carbon atom at the 5-position of thiazoles can lead to typical donor–acceptor (D-A) systems . Therefore, a range of derivatives with oxygen-containing functional groups at that position has been developed, and their effect on the photophysical properties has been examined. Recently, we have reported the synthesis of 5- N -arylamino-2,4-diarylthiazoles from the reaction of secondary thioamides and thioformamides .…”