Fluorescence enhancement of cationic diacetylene‐contained polyelectrolyte by anions and cations and application for sensitive and selective detection of Hg2+ |
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| Authors: | Wennan Zeng Lingyun Wang Shuimu Lin Shouping Liu Roger Beuerman Derong Cao |
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| Institution: | 1. State Key Laboratory of Luminescent Materials and Devices, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China;2. School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Hunan, Xiangtan 411201, China;3. Singapore Eye Research Institute, 168751 Singapore |
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| Abstract: | An unusual phenomenon, the fluorescence enhancement of cationic conjugated fluorene‐co‐carbazole‐co‐diacetylene polymers (CPFC) by both anionic and cationic ions, was reported. The fluorescence enhancement of CPFC strongly depended on the nature of the ions and the counterions. In the solution of DMF/H2O, PO , CO and Hg2+ showed the most pronounced fluorescence enhancement response of CPFC (more than 10‐fold). The fluorescence of CPFC was quenched by K4Fe(CN)6, and then could be recovered with the addition of Hg2+. Based on these observations, a simple and sensitive fluorescent “turn‐on” sensor in aqueous solution for Hg2+ was developed by use of a system of CPFC/ K4Fe(CN)6]. © 2011 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2011 |
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| Keywords: | cationic conjugated polyelectrolytes fluorescence “ turn‐on” sensor Hg2+ |
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