基于含偶氮酚羟基席夫碱新型简单比色传感器

通过简单的步骤合成了一个新型的N-(2-羟基-5-氯二苯酮基)-N'-[2-羟基-5-偶氮苯基-苯甲醛]-1,2-二苯胺受体，并有很高的产率．利用紫外光谱研究了受体的阴离子识别的性质．结果表明受体对F^-、AcO^-和H₂PO₄^-有很高的结合能力，而对Cl^-、Br^-和I^-没有结合能力．在受体的二甲基亚砜溶液中加入三种有结合能力的阴离子时，溶液展示了从无色到黄色的明显颜色变化，可以通过裸眼识别．在其它卤素离子存在下受体可以担当氟离子的传感器．紫外数据证明受体与阴离子通过氢键的相互作用形成1:1化学计量比的复合物.

A Colorimetric Receptor Based on Schiff-Base Bearing Azo-Phenolic Hydroxy Group

A novel N-(2-hydroxy-5-chlorodibenzophenone)-N0-[2-hydroxy-5-azophenyl-benzaldehyde]-1,2-diaminobenzene receptor has been synthesized by simple steps with good yields. The anion recognition properties were studied by ultraviolet-visible spectroscopy. The resultsshowed that the receptor had a higher affinity to F^-, AcO^-, and H₂PO₄^-, but no evident binding with Cl^-, Br^-, and I^-. Upon addition of the three former anions to the receptors in DMSO, the solution exhibited an obvious color change from colorless to yellow, which could be observed by the naked eye, thus the receptor could act as a fluoride ion sensor even in the presence of other halide ions. The UV-Vis data indicates that a 1:1 stoichiometric complex is formed through hydrogen bonding interactions between receptor and anions.