环糊精包埋方酰胺衍生物基化学探针的制备及其阴离子识别

Preparation of β-Cyclodextrin Encapsulated Squaramide Based Chemosensor for the Selective Detection of I^- and NO₂^-

摘要: 制备了新型β-环糊精包埋方酰胺衍生物SA（1，2，3，8-四氢环丁b喹喔啉-1，2-二酮）的化学探针，用于I^-和NO₂^-的选择性识别.利用紫外-可见吸收光谱考察了包合物与F^-、Cl^-、Br^-、I^-、PF₆^-、SO₄^2-、CO₃^2-、NO₃^-、NO₂^-的相互作用.结果表明，I^-和NO₂^-的存在下包合物溶液的紫外-可见吸收光谱分别在262和365 nm处吸收强度显著增强出现特征吸收峰，揭示了探针对I^-和NO₂^-具有较好的定性选择识别，并通过滴定试验分别对I^-和NO₂^-进行了定量分析.

Abstract: A β-cyclodextrin encapsulated squaramide derivative SA (cyclobutab quinoxaline-1,2 (3H, 8H)-dione) were synthesized for the selective sensing of I^- and NO₂^- in aqueous solution in competitive fashion. With I^- and NO₂^-, the encapsulated probe shows a highly characteristic UV-Vis absorbance enhancement at centered 262 and 365 nm, respectively over other tested ions. Furthermore, the quantitative analysis of the both target anions was successfully achieved by the absorption titration, making the fast and trace amount detection of I^- and NO₂^- possible by probe.