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首页> 外文期刊>Advanced Functional Materials >Highly Selective and Reversible Optical, Colorimetric, and Electrochemical Detection of Mercury(Ⅱ) by Amphiphilic Ruthenium Complexes Anchored onto Mesoporous Oxide Films
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Highly Selective and Reversible Optical, Colorimetric, and Electrochemical Detection of Mercury(Ⅱ) by Amphiphilic Ruthenium Complexes Anchored onto Mesoporous Oxide Films

机译：固定在中孔氧化膜上的两亲钌配合物对汞（Ⅱ）的选择性和可逆光学，电化学检测

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摘要

The colorimetric, fluorimetric, and electrochemical detection of mercury ions by functionalized ruthenium sensitizers in aqueous and non-aqueous solutions and on anchored TiO_2 films are investigated. Mercury ions coordinate reversibly to the ruthenium sensitizers, inducing a color change and increasing the phosphorescence intensity significantly. The electrochemical data of the adsorbed sensitizer on TiO_2 films show a reversible couple, owing to the percolation through electronic couplings between -NCS ligands of neighboring molecules; upon exposure to a Hg~(2+) -containing solution, the electrical signal is appreciably reduced. The detection limit for mercury(Ⅱ) ions using UV-vis spectroscopy in homogeneous aqueous solutions is estimated to be ～ 20 ppb. The results presented herein have important implications in the development of reversible colorimetric, fluorimetric, and electrochemical on-off sensors based on nano-crystalline semiconductor films for the simple, swift, and selective detection of mercury ions in solution.
机译：研究了功能化钌敏化剂在水溶液和非水溶液中以及在TiO_2固定膜上对汞离子的比色，荧光和电化学检测。汞离子可逆地与钌敏化剂配位，引起颜色变化并显着增加磷光强度。 TiO_2薄膜上吸附的敏化剂的电化学数据显示出可逆的偶合，这是由于相邻分子的-NCS配体之间通过电子耦合渗透所致。当暴露于含Hg〜（2+）的溶液中时，电信号明显降低。紫外可见光谱法在均匀水溶液中对汞（Ⅱ）离子的检出限估计为〜20 ppb。本文提出的结果对于基于纳米晶体半导体膜的可逆比色，荧光和电化学开关传感器的开发具有重要意义，该传感器可用于简单，快速和选择性地检测溶液中的汞离子。

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