1152809-45-4Relevant academic research and scientific papers
Selective photoconversion of photochromic diarylethenes and their properties
Liu, Huan-Huan,Chen, Yi
, p. 2223 - 2227 (2012)
Selective photoconversions of photochromic diarylethene derivatives has been described using diarylethene derivative 1a as a model compound. Upon irradiation with 254 nm light, 1a undergoes photocyclization to yield the ring-closed isomer 1b in the absence of oxygen, or is transformed to the thiolactone derivative 1c in the presence of oxygen (in the air), respectively. It was found that 1b can be reversed back to 1a with visible light irradiation, the ring-opening and ring-closing photoswitch can be performed in the absence of oxygen. 1c is, however, photo-inactive and cannot be reversed back to 1a with UV or visible light irradiation. It was also found that 1c shows fluorescence whereas both 1a and 1b show no fluorescence. The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.
Synthesis and photophysical properties of thiolactone derivatives
Liu, Huan-Huan,Chen, Yi
, p. 1872 - 1876 (2013/03/13)
A class of bis-thiolactone derivatives is prepared by photo-conversion of photochromic diarylethenes with a bis (5-chloro-2-methylthiophen-3-yl) system in moderate yields (50-60%). Bis-thiolactone derivatives show fluorescence in solution with moderate fluorescent quantum yields (0.11-0.17). Reaction mechanism exhibits that the photo-conversion of diarylethenes to bis-thiolactone derivatives undergoes a two-step reaction: photocyclization and photo-oxidation.
Imidazole-based dithienylethenes: Synthesis, photochromism, and effects of metal ions
Zhang,Chen,Jiang,Yu, Guang-Ao,Liu,Yin
, p. 1 - 7 (2013/06/27)
A series of imidazole-bridging dithienylethenes was synthesized by the condensation of thiophene-based diketone and methoxyl-substituted benzaldehyde. Their UV-Vis absorption and fluorescent spectra were investigated before and after irradiation with UV light. It is worth mentioning that the metal ions such as Cd2+, Cu2+, Fe3+ can obviously enhance the intensity of emission spectra.
