Abstract
Based on rhodamine 6G, a highly sensitive and selective fluorescent sensor R6G1 for Hg2+ detection had been designed and prepared. It was synthesized through the well-known reaction that thiourea derivatives with amine could easily be transformed into guanidine derivatives with the promotion of Hg2+. By coordination with Hg2+, R6G1 exhibited high sensitivity and selectivity over other metal ions in aqueous systems. Furthermore, fluorescence titration experiments established the well-fitted linearity function of the fluorescent intensity with the concentration of Hg2+ in aqueous solution. The results showed that R6G1 provided high water solubility and high selectivity toward Hg2+ but no significant response toward other competitive cations and anions. It was suggested that the chemosensor would find its application in environmental field requiring rapid and accurate Hg2+ ion analysis.
Acknowledgement
The work was supported by the key project in Yunnan Provincial Education Department (2014Z092), YMU-DEAKIN International Associated Laboratory on Functional Materials, Key Laboratory of Resource Clean Conversion in Ethnic Region, Education Department of Yunnan Province (117-02001001002107), and Joint Research Centre for International Cross-border Ethnic Regions Biomass Clean Utilization in Yunnan.
Notes
Presented at the 8th International Conference on Challenges in Environmental Science & Engineering (CESE-2015) 28 September–2 October 2015, Sydney, Australia