Synthesis and photophysical properties of thiolactone derivatives
摘要:
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. (C) 2013 Elsevier Ltd. All rights reserved.
Imidazole-Based Dithienylethenes: Synthesis, Photochromism, and Effects of Metal Ions
作者:C. Zhang、Z. Chen、C. Jiang、Guang-Ao Yu、S. H. Liu、J. Yin
DOI:10.1080/15421406.2012.762497
日期:2013.6.1
A series of imidazole-bridging dithienylethenes was synthesized by the condensation of thiophene-based diketone and methoxyl-substituted benzaldehyde. Their UVVis 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.