作者:Weiwei Huang、Hongyan Su、Hai Lin、Huakuan Lin
DOI:10.1007/s10847-010-9871-8
日期:2011.6
A novel highly sensitive colorimetric receptor 1 for acetate based on N-(4-oxa-3-one-phenanthrene-2-carbonyl)-p-nitrophenylhydrazine was designed, synthesized and characterized. Experiments showed that the receptor 1 can selectively recognize acetate in DMSO solution and aqueous solution. The ability of recognition and the bond between receptor 1 and anions were determined using visual inspection, UV–Vis analyses and 1H NMR experiments. In particular, the UV–Vis analyses showed the whole process included two stages: in the first step, the hydrazine form of 1 interacted with acetate through hydrogen bonding with an obvious color change from yellow to purple upon addition of a small amount of AcO−. In the second step, as increasing the addition of AcO−, the color changed from purple to deep yellow, which displayed the deprotonation of the receptor 1.
设计、合成并表征了一种基于 N-(4-氧杂-3-酮菲-2-羰基)-对硝基苯肼的新型高灵敏度醋酸盐比色受体 1。实验表明,受体 1 能在二甲基亚砜溶液和水溶液中选择性地识别醋酸盐。通过目测、紫外可见光分析和 1H NMR 实验确定了受体 1 的识别能力以及受体 1 与阴离子之间的结合。其中,紫外可见光分析表明,整个过程包括两个阶段:第一步,1 的肼形式通过氢键与醋酸盐相互作用,加入少量 AcO- 后,颜色明显由黄色变为紫色。在第二步中,随着 AcO- 添加量的增加,颜色从紫色变为深黄色,这表明受体 1 发生了去质子化反应。