A Novel D-pi-A Conjugated Polymer Chemosensor Based on Benzo[c][1,2,5] selenadiazole for Highly Selective and Sensitive Recognition of Mercury (II) Ions

作者：Li Duanqin; Li Hui; Liu Miaochang; Chen Jiuxi; Ding Jinchang; Huang Xiaobo^*; Wu Huayue

来源：Macromolecular Chemistry and Physics, 2014, 215(1): 82-89.

DOI：10.1002/macp.201300542

• benzoselenadiazole
• D-pi-A conjugated polymers
• fluorescent sensors
• mercury detection
• naked-eye indicators

A novel-donor-pi-acceptor-type conjugated polymer based on the benzo[c][1,2,5]selenadiazole moiety and the fluorene group via an alkyne module is prepared by the the Sonogashira-Hagihara reaction. The polymer displays an absorption peak at a longer wavelength at 477 nm and shows orange fluorescence at 576 nm. The responsive optical properties of the polymer on various metal ions are investigated by fluorescence emission and UV-vis absorption spectroscopy measurements. Compared with other metal cations, Hg2+ shows the most pronounced UV-vis absorption and fluorescence response of the polymer. The visible color and the fluorescence color of the polymer sensor both disappear after addition of Hg2+, which can be easily detected by the naked eye. The results indicate this kind of polymer containing benzoselenadiazole units can be used as a highly selective and sensitive chemosensor for Hg2+ detection.

• 出版日期2014-1
• 单位温州大学