Photochromism of dihydroindolizines. Part XX: Synthesis and photophysical behavior of fluorenyldihydroindolizines photochromes based “Click” chemistry strategy
作者:Saleh A. Ahmed、Ismail I. Althagafi、Basim H. Asghar、Khalid S. Khairou、Hussni A. Muathen
DOI:10.1016/j.jphotochem.2016.05.025
日期:2016.9
spectroscopic tools. Polychromatic light irradiation of the photochromic DHIs led to ring opened colored betaines, which underwent reversible thermal 1,5-electrocyclization. The red to reddish-violet betaines returned back through 1,5-electrocyclization to the corresponding DHIs with diverse rate constants depending on the subsitutents in fluorene terminal triazole moieties. The unique photochromic properties
通过“点击”化学策略通过不同的化学方法和化学方法生产了新型的带有不同炔属连接物-共轭物的取代2,7-二取代三唑并芴(区域A)和取代哒嗪为杂环碱的新型光致变色二氢吲哚并嗪(DHI)。光化学途径。在分析和光谱学工具的基础上,建立了新的光致变色三唑-二氢吲哚并嗪的化学结构。光致变色DHI的多色光辐照导致开环的彩色甜菜碱进行了可逆的热1,5电环化。红色到淡紫色的甜菜碱通过1,5-电环化返回到相应的DHI,这些DHI具有不同的速率常数,具体取决于芴末端三唑部分中的取代基。