Affiliation:
1. Key Laboratory of Eco‐functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco‐environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University Lanzhou Gansu 730070 China
2. Key Laboratory of Environment‐Friendly Composite Materials of the State Ethnic Affairs Commission, Gansu Provincial Biomass Function Composites Engineering Research Center, College of Chemical Engineering, Northwest Minzu University (Northwest University for Nationalities) Xibei Xincun Lanzhou Gansu 730000 China
Abstract
Comprehensive SummaryThe cyanide anion (CN–) is known to be one of the most toxic anions. Therefore, there is an urgent need to develop a reliable, sensitive, selective, rapid and effective method for the detection of CN–. Here, a self‐assembly strategy based on pillar[5]arene P5 and azine derivative AZ was used to construct supramolecular sensors, and it was found that the detection effect of CN– was significantly improved by the assembly strategy. The sensitivity of the assembled sensor P5‐AZ to CN– is more than 10 times higher than that of AZ. The detect mechanism was further investigated by theoretical calculations and 1H NMR. The results showed that AZ detects CN– by a deprotonation process with fluorescence enhancement, while P5‐AZ improves the sensitivity of CN– recognition through hydrogen bonding, anion‐π and anion‐dipole interactions, as well as the strong bonding ability of the assembly. Supramolecular assembly P5‐AZ has the advantages of low toxicity, high sensitivity, and more importantly, it provides a method to detect CN– sensitivity in the aqueous phase and organisms by host‐guest assembly.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Gansu Province