新型钳状芳杂环杯[4]芳烃修饰电极对银离子的分子识别研究

合成了25,27-二羟基-26,28-双(3-苯并噻唑基硫代丙氧基)-5,11,17,23-四叔丁基杯4]芳烃,并将其研制成PVC膜化学修饰电极.探讨了膜电极的修饰方法及伏安性能对金属离子的识别及其识别机理.结果表明,采用涂层-刻痕法制备的修饰电极在0.2mol/LHNO3溶液中对银离子有很灵敏的伏安响应,在5.0×10-8～1.3×10-6mol/L范围内氧化峰电流与银离子呈线性关系,检测限为3.8×10-8mol/L.用该法测定了一些实际样品,结果令人满意.

Preparation of PVC Membrane Electrode Modified by Novel Calix[4]arene Derivative and Electrochemical Recognition for Ag+ in Acidic Solution

Novel PVC membrane glassy carbon electrode modified by 25,27-dihydroxy-26,28-bis(3-benzothiazolylthiapropoxy)-5,11,17,23-tetra-tert-butyl calixarene(CAL-GCE) was firstly reported. The preparation method, voltammetric characteristic of the modified electrode and application in recognition for metal ions were investigated. The results show that the CAL-GCE has a selective voltammetic response to silver ion in 0.2 mol/L HNO3 solution and can be applied in analysis. The calibration curve of Ag + ion covered a range of 5.0×10-8-1.3×10-6 mol/L, and the detection limit of the presented method for Ag + ion was 3.8×10-8 mol/L. The method was simple, sensitive and reliable. The mechanism of the interaction of this system was also discussed.