Fluorescence array-based sensing of metal ions using conjugated polyelectrolytes

ACS Applied Materials & Interfaces
Yi WuChunyan Tan

Abstract

Array-based sensing offers several advantages for detecting a series of analytes with common structures or properties. In this study, four anionic conjugated polyelectrolytes (CPEs) with a common poly(p-pheynylene ethynylene) (PPE) backbone and varying pendant ionic side chains were designed. The conjugation length, repeat unit pattern, and ionic side chain composition were the main factors affecting the fluorescence patterns of CPE polymers in response to the addition of different metal ions. Eight metal ions, including Pb(2+), Hg(2+), Fe(3+), Cr(3+), Cu(2+), Mn(2+), Ni(2+), and Co(2+), categorized as water contaminants by the Environmental Protection Agency, were selected as analytes in this study. Fluorescence intensity response patterns of the four-PPE sensor array toward each of the metal ions were recorded, analyzed, and transformed into canonical scores using linear discrimination analysis (LDA), which permitted clear differentiation between metal ions using both two-dimensional and three-dimensional graphs. In particular, the array could readily differentiate between eight toxic metal ions in separate aqueous solutions at 100 nM. Our four-PPE sensor array also provides a practical application to quantify Pb(2+) and Hg(2...Continue Reading

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Citations

Feb 18, 2016·Chemical Communications : Chem Comm·Fang PuXiaogang Qu
Dec 29, 2015·ACS Applied Materials & Interfaces·Yuanyuan ZhouYongqiang Cheng
Sep 24, 2015·ACS Applied Materials & Interfaces·Zhifang ChenYuyang Jiang
Apr 19, 2016·Analytical Chemistry·Sari PihlasaloHarri J Härmä
Jun 1, 2016·Journal of Agricultural and Food Chemistry·Zhuangsheng LinJulie M Goddard
Jul 15, 2016·ACS Applied Materials & Interfaces·Jinsong HanUwe H F Bunz
Feb 13, 2016·Chemical Communications : Chem Comm·Wei-Tao DouXiao-Peng He
Aug 31, 2017·The Analyst·David G SmithElizabeth J New
Jan 3, 2019·Chemistry, an Asian Journal·Pradipta Behera, Mrinmoy De
Jun 21, 2017·Topics in Current Chemistry·Jan FreudenbergUwe H F Bunz
Oct 25, 2020·Journal of Hazardous Materials·Xiang-Ping ZhangHao-Hua Deng
Feb 26, 2021·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Xiupei YangJie Zhang
Oct 14, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Radhakanta GhoshArun K Nandi

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