light red color of the complex solution. Furthermore, the mechanism of recognition of Ag+ by molecular tweezer 7a was studied by a nuclear magnetic titration test and computer molecular simulation, and a rapid detection method of Ag+ using host molecular tweezer 7a was established. Through the determination of Ag+ in milk powder, quinoa and other food samples, it was proved that this novel method had
合成了手性胆甾型分子镊7a,并通过紫外和荧光光谱研究了其对Ag +、Al 3+、Ca 2+等的识别性能。结果表明,在
乙醇/
Tris(1/1,v / v,pH 7.0)缓冲液中,宿主分子镊7a对Ag +具有特异性识别能力,检测限可达1×10 -6 mol/ L等
金属离子对Ag +识别的影响不大。同时,肉眼检测Ag +由络合物溶液的浅红色实现。此外,通过核磁滴定试验和计算机分子模拟研究了分子镊7a识别Ag +的机理,建立了宿主分子镊7a快速检测Ag + 的方法。通过对奶粉、藜麦等食品样品中Ag +的测定,证明该新方法在食品中Ag +的检测中具有良好的应用前景。