College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China.
College of Chemical Engineering, Qinghai University, Xining 810016, China.
Molecules. 2021 Nov 17;26(22):6919. doi: 10.3390/molecules26226919.
Chiral cholesteric molecular tweezer was synthesized, and its recognition properties for Ag, Al, Ca etc., were investigated by UV and fluorescence spectra. The results showed that in ethanol/Tris (1/1, /, pH 7.0) buffer solution, the host molecular tweezer had a specific recognition ability for Ag, the detection limit was up to 1 × 10 mol/L, and other metal ions had little effect on Ag recognition. At the same time, the naked-eye detection of Ag was realized by the light red color of the complex solution. Furthermore, the mechanism of recognition of Ag by molecular tweezer was studied by a nuclear magnetic titration test and computer molecular simulation, and a rapid detection method of Ag using host molecular tweezer was established. Through the determination of Ag in milk powder, quinoa and other food samples, it was proved that this novel method had a good application prospect for the detection of Ag in food.
手性胆甾相分子钳的合成及其对 Ag、Al、Ca 等的识别性能进行了紫外和荧光光谱研究。结果表明，在乙醇/Tris（1/1，/，pH7.0）缓冲溶液中，主体分子钳对 Ag 具有特殊的识别能力，检测限高达 1×10-6mol/L，而其他金属离子对 Ag 的识别影响很小。同时，通过复合物溶液的浅红色实现了对 Ag 的肉眼检测。此外，通过核磁共振滴定试验和计算机分子模拟研究了分子钳对 Ag 的识别机理，建立了一种利用主体分子钳快速检测 Ag 的方法。通过对奶粉、藜麦等食品样品中 Ag 的测定，证明了该新方法在食品中 Ag 的检测中具有良好的应用前景。
