Water-Soluble Hyperbranched Polyelectrolytes with High Fluorescence Quantum Yield: Facile Synthesis and Selective Chemosensor for Hg2+ and Cu2+ Ions

被引：43
作者：
Bao, Biqing [1 ]
Yuwen, Lihui [1 ]
Zhan, Xiaowei [2 ,3 ]
Wang, Lianhui [1 ,4 ]
机构：
[1] Fudan Univ, Adv Mat Lab, Shanghai 200433, Peoples R China
[2] Chinese Acad Sci, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
[3] Chinese Acad Sci, CAS Key Lab Organ Solids, Inst Chem, Beijing 100190, Peoples R China
[4] Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China
来源：
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2010年 / 48卷 / 15期
基金：
中国国家自然科学基金;
关键词：
fluorescence sensor; hyperbranched; polyelectrolytes; synthesis; water-soluble conjugated polymer; PI-CONJUGATED POLYMER; DENDRON SIDE-CHAINS; FUNCTIONALIZED POLYFLUORENE; LUMINESCENT POLYFLUORENES; DERIVATIVES;
D O I：
10.1002/pola.24128
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
New water-soluble hyperbranched polyfluorenes bearing carboxylate side chains have been synthesized by the simple "A2 + B2 + C3" protocol based on Suzuki coupling polymerization. The linear polyfluorene analogue LPFA was also synthesized for comparative investigation. The optical properties of the neutral precursory polymers in CHCl3 and final carboxylic-anionic conjugated polyelectrolytes in buffer solution were investigated. The obtained hyperbranched polyelectrolyte HPFA2 with lower content of branch unit (2%) showed excellent solubility and high fluorescence quantum yield (Phi(F) = 89%) in aqueous solution. Fluorescence quenching of HPFA2 by different metal ions was also investigated, the polyelectrolyte showed high selectivity for Hg2+ and Cu2+ ions relative to other various metal ions in buffer solution. The Stern-Volmer constant K-sv was determined to be 0.80 x 10(6) M-1 for Hg2+ and 3.11 x 10(6) M-1 for Cu2+, respectively, indicating the potential application of HPFA2 as a highly selective and sensitive chemosensor for Hg2+ and Cu2+ ions in aqueous solution. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 3431-3439, 2010
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页码：3431 / 3439
页数：9
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