The ring-closed isomers showed stronger antibacterial activity than the corresponding ring-open isomers (E. coli up to 16 times).
与相应的开环异构体相比,闭环异构体具有更强的抗菌活性(对大肠杆菌的抗菌活性高达 16 倍)。
Dithienylethenes containing aromatic carbons: Synthesis, photochromism and anion recognition
作者:Wenju Liu、Fang Hu、Zhiming Chen、Ziyong Li、Jun Yin、Guang-Ao Yu、Sheng Hua Liu
DOI:10.1016/j.dyepig.2015.01.004
日期:2015.4
A series of novel dithienylethenes with different aromatic carbons were efficiently synthesized using a four-component Ugi reaction and their structures confirmed by NMR spectroscopy, mass spectroscopy (MS) and elemental analysis. Their photochromic properties and fluorescence behaviors have been measured upon irradiation with UV light in solution. Investigations on their photochromic properties indicated that the dithienylethene derivatives had good reversibility upon irradiation with UV or visible light. In addition, they displayed excellent fluorescence switchable behavior. It was found that the degree of conjugation in the aromatic ring had a great effect on their photochromism and fluorescence properties. Moreover, the anthracene-based dithienylethene derivatives displayed high selectivity towards iodide and the pyrene-based dithienylethenes derivatives could act as a colorimetric fluonde sensor. (C) 2015 Elsevier Ltd. All rights reserved.