Citation: Miao-Miao Hong, Ai-Feng Liu, Ying Xu, Dong-Mei Xu. Synthesis and properties of three novel rhodamine-based fluorescent sensors for Hg²⁺[J]. Chinese Chemical Letters, ;2016, 27(6): 989-992. doi: 10.1016/j.cclet.2016.03.027 shu

Synthesis and properties of three novel rhodamine-based fluorescent sensors for Hg²⁺

Miao-Miao Hong ^a,b, ,
Ai-Feng Liu ^a,b ,
Ying Xu ^c ,
Dong-Mei Xu ^a,b

a College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China;
b Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Soochow University, Suzhou 215123, China;
c Testing and Analysis Center, Soochow University, Suzhou 215123, China

Received Date: 30 January 2016
Revised Date: 11 March 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 21074085), the Priority Academic Program Development of Jiangsu Higher Education Institutions, the Graduate Student Innovation Training Project of Jiangsu Province (No. KYLX_1241), and the State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials.

Three novel rhodamine-based Hg²⁺ fluorescent sensors were designed and synthesized. The sensors could work in semi-aqueous solutions with nearly neutral pH and showed high selectivity and sensitivity to Hg²⁺ with remarkable fluorescence enhancement. For these three sensors, the linear working range broadened (0-80, 0-100 and 0-140 mmol/L, respectively) and the sensitivity increased (7.7, 15.5 and 17.6 folds of the fluorescence enhancement and 512, 66.2 and 37.6 ppb of the detection limit) with the rising of the thiourea-unit numbers. Furthermore the sensors exhibited excellent interference immunity tomultiple environmentally and biologically relevant metal ions. Pond and tap water assay showed good practicability of the sensors. The number of the bound Hg²⁺ equaling to that of the thiourea units and the irreversible recognition process implied a new interaction way between Hg²⁺ and the sensor.
- Rhodamine,
- Polyethylenepolyamine,
- Thiourea,
- Fluorescent sensor,
- Hg²⁺
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Synthesis and properties of three novel rhodamine-based fluorescent sensors for Hg2+

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Synthesis and properties of three novel rhodamine-based fluorescent sensors for Hg²⁺