文献类型：期刊文献

英文题名：An acid-fluorescence and alkali-colorimetric dual channels sensor for Hg2+ selective detection by different coordination manners in aqueous media

作者：Zhang, Xiulan[1];Wang, Yu[1];Yuan, Huihui[2];Guo, Xuhong[1,3];Dai, Bin[1];Jia, Xin[1]

机构：[1]Shihezi Univ, Engn Res Ctr Mat Oriented Chem Engn Xinjiang Bing, Key Lab Mat Oriented Chem Engn Xinjiang Uygur Aut, Key Lab Green Proc Chem Engn Xinjiang Bingtuan,Sc, Shihezi 832003, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：373

起止页码：12

外文期刊名：JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY

收录：;EI(收录号：20240915628897);WOS:【SCI-EXPANDED(收录号:WOS:000458225200002)】；

基金：This study was supported by the National Natural Science Foundation of China (U1703351, 51663021), Bingtuan Excellent Young Scholars, Bingtuan Innovation Team in Key Areas (2015BD003) and Yangtze River scholar research project of Shihezi University (No. CJXZ201401).

语种：英文

外文关键词：Fluorescence; Colorimetric; Mercury ion; Dual-channel

摘要：Due to the advantages of high selectivity, accuracy and mutual calibration, dual-channel sensors have drawn much attention. In this work, a water-soluble fluorescence and colorimetric dual-channel chemosensor (AAT) with both azomonardine and aminothiazole units has been designed and synthesized. Ar-OH and =N- groups, which respectively belonged to azomonardine and thiazole unit, exhibited pH dependent ionization, which leaded AAT exhibiting strong naked-eye visible fluorescence and color in acidic and alkaline solution, respectively. When =N- was ionized in acidic solution, fluorescence was turned on. The colorimetry occurred while the ionization of Ar-OH in alkaline solution. Moreover, the solution pH had a significant impact on the binding efficiency between AAT and Hg2+, resulted in different coordination manners and stoichiometry. At pH 5.0, in the fluorescence channel, the stoichiometry of AAT for Hg2+ was calculated as 1:2 and the linear detection concentration was ranged from 0 to 35 mu M. It was in a range of 0-12 mu M through colorimetric method with the stoichiometry of 1:1 at pH 7.5. Furthermore, neither in fluorescence or in calorimetric channel, AAT showed high specificity toward Hg2+ among numerous cationic and anion ions. Also, AAT realized the Hg2+ identification and determination in river water samples.