Recognition behavior of 4-sulfonic acid benzene azo 8-hydroxyquinoline to anions in different solvents
YANG Lei， ZHANG Yunxing， WANG Xiaoqin， WANG Zhenhui， AO Huahe， ZHU Zhifei
College of Environmental and Biological Engineering， Fujian Provincial Key Laboratory of Ecology-toxicological Effects & Control for Emerging Contaminants， Putian University， Putian， Fujian， 351100， China
Abstract：In order to prepare quinoline azo derivatives which could dissolve in strong polar solvent and used as subject recognition of anions in solvents， 4-sulfonic acid benzene azo 8-hydroxyquinoline was synthesized using 8-hydroxyquinoline and p-aminobenzenesulfonic acid as raw materials. The structure and behavior of 8-hydroxyquinoline which interacts with many ions was studied by infrared spectrum and UV-Vis spectra. A new system of anion recognition was constructed which possessed high selectivity， good sensitivity and ablitity to detect and conduct negative ions by naked eyes. The result showed that H2PO4(－) could be recognized by SUL-8Hq in acetonitrile， and a new peak appeared at 310 nm，whose intensity was directly proportional to the concentration of H2PO4(－) ion. OCl－ was recognized by SUL-8Hq in water， with the absorption peak at 472 nm increasing with the concentration of OCl－ ion. HPO4(2－) and OCl－ were also able to be recognized in methanol， and better linear relation was observed between new emerging absorption peak value during recognition process and recognized ion concentration. A new method was offered for constructing new recognition system by studying ion recognition principles in different polar solvents.
2019, Vol. 53 
