An Artificial Tongue Fluorescent Sensor Array for Identification and Quantitation of Various Heavy Metal Ions
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- 作者：Wang Xu ; Changliang Ren ; Chai Lean Teoh ; Juanjuan Peng ; Shubhankar Haribhau Gadre ; Hyun-Woo Rhee ; Chi-Lik Ken Lee ; Young-Tae Chang
- 刊名：Analytical Chemistry
- 出版年：2014
- 出版时间：September 2, 2014
- 年：2014
- 卷：86
- 期：17
- 页码：8763-8769
- 全文大小：410K
- ISSN：1520-6882
文摘
Herein, a small-molecule fluorescent sensor array for rapid identification of seven heavy metal ions was designed and synthesized, with its sensing mechanism mimicking that of a tongue. The photoinduced electron transfer and intramolecular charge transfer mechanism result in combinatorial interactions between sensor array and heavy metal ions, which lead to diversified fluorescence wavelength shifts and emission intensity changes. Upon principle component analysis (PCA), this result renders clear identification of each heavy metal ion on a 3D spatial dispersion graph. Further exploration provides a concentration-dependent pattern, allowing both qualitative and quantitative measurements of heavy metal ions. On the basis of this information, a 鈥渟afe-zone鈥?concept was proposed, which provides rapid exclusion of versatile hazardous species from clean water samples based on toxicity characteristic leaching procedure standards. This type of small-molecule fluorescent sensor array could open a new avenue for multiple heavy metal ion detection and simplified water quality analysis.