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以酚羟基为识别位点,蒽醌基和偶氮基为信号报告基团,设计合成了识别阴离子的主体分子2-[(4羟-基苯基)偶氮]蒽醌。紫外-可见吸收光谱结果表明,在DM SO介质中,主体分子可以“裸眼”识别F-和A c-,吸收光谱发生显著变化,溶液颜色由黄色变为蓝绿色,其它阴离子不影响其对F-和A c-的识别。初步探讨了识别机理,表明主体分子与阴离子之间形成氢键促进了分子内电荷转移,使吸收光谱发生显著红移,溶剂对主体分子与阴离子之间的反应存在影响。
With phenolic hydroxyl as the recognition site, anthraquinone and azo groups as signal reporter groups, the main molecule 2 - [(4hydroxyphenyl) azo] anthraquinone was designed and synthesized. The results of UV-Vis absorption spectra show that the host molecule can recognize F- and A c- in “naked eye” and the absorption spectrum changes significantly in DM SO medium. The solution color changes from yellow to blue-green, while the other anions do not affect Identification of F- and A c-. The mechanism of recognition is discussed preliminarily. It indicates that the formation of hydrogen bond between the host molecule and the anion promotes the intramolecular charge transfer, resulting in a significant red shift of the absorption spectrum. The solvent has an influence on the reaction between the host molecule and the anion.