Synthesis of Di- and Trixanthones that Display High Stability and a Visual Fluorescence Response to Strong Acid
作者:Baolin Wang、Jiafeng Shao、Taoshan Xu、Lichuan Chen、Jinlian Zhao、Yongliang Shao、Hao-Li Zhang、Xiangfeng Shao
DOI:10.1002/asia.201402815
日期:2014.11
Three dixanthones (1–3) and an unprecedented C3h‐symmetric trixanthone (4) were synthesized through a three‐step approach in overall yields above 63 %. These compounds possessed a planar π‐conjugated system and formed tight face‐to‐face columnar stacks, as confirmed by single‐crystal structural analysis. In comparison with xanthone, the fluorescence emissions of compounds 1–4 showed significant red‐shifts
三个dixanthones(1 - 3)和一个前所未有Ç 3H -对称trixanthone(4)通过在63%以上的总产率的三步骤方法来合成。这些化合物具有平面π共轭体系,并形成了紧密的面对面柱状堆叠,这已通过单晶结构分析证实。与呫吨酮比较,化合物的荧光发射1 - 4显示显著红移,具有改善的量子产率。此外,化合物的荧光发射1 - 4可以在强酸性环境中进行调制而不会分解,从而导致排放物进一步红移,并增强了排放强度。这些化合物作为光电材料和/或化学传感器具有潜在的应用。