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首页> 外文期刊>Inorganic Chemistry Communications >A highly sensitive and selective ratiometric and colorimetric sensor for Hg~(2+) based on a rhodamine-nitrobenzoxadiazole conjugate
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A highly sensitive and selective ratiometric and colorimetric sensor for Hg~(2+) based on a rhodamine-nitrobenzoxadiazole conjugate

机译：基于罗丹明-硝基苯并恶二唑共轭物的Hg〜（2+）高灵敏度和选择性比例色度传感器

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摘要

An effective Hg~(2+)-specific probe (1) was designed and prepared based on a rhodamine-nitrobenzoxadiazole conjugate. The sensing behavior of this probe was studied by UV-visible and fluorescence spectroscopy. With Hg~(2+), the probe displayed both colorimetric responses and ratiometric changes. The ratio of the absorption intensities at 525 and 460 nm for the two chromophores in the probe increased from 0.17 to 0.46. The probe exhibited excellent selectivity and sensitivity towards Hg~(2+) over other metal ions, which could be attributed to the Hg~(2+)-triggered ring opening of the spirolactam of the rhodamine moiety and the formation of a 1:1 1-Hg~(2+) complex.
机译：基于罗丹明-硝基苯并恶二唑共轭物，设计并制备了有效的Hg〜（2+）特异性探针（1）。通过紫外可见和荧光光谱研究了该探针的传感行为。使用Hg〜（2+）时，探针显示比色响应和比率变化。探针中两个生色团在525和460 nm处的吸收强度之比从0.17增加到0.46。该探针对Hg〜（2+）的选择性和灵敏度优于其他金属离子，这可能归因于若丹明部分螺内酰胺的Hg〜（2+）触发的开环和1：1的形成1-Hg〜（2+）络合物

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