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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A highly selective chromo- and fluorogenic dual responding fluoride sensor: naked-eye detection of F- ion in natural water via a test paper
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A highly selective chromo- and fluorogenic dual responding fluoride sensor: naked-eye detection of F- ion in natural water via a test paper

机译：高度选择性的发色和发荧光双响应氟化物传感器：通过试纸用肉眼检测天然水中的F-离子

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摘要

A highly selective and sensitive chromogenic and fluorogenic dual signal responding fluoride-sensor 1, comprising a Ru-bipy fluorophore (bipy = 2,2'-bipyridine) and a 2,4-dinitrophenylhydrazone chromophore was prepared and spectroscopically characterized. Uv-vis titrations with F-revealed the appearance of a new intense absorption band centered at about 580 nm which was accompanied by a dramatic change in color from yellow to magenta, with the association constant logK being 6.71 +/- 0.04. Fluorescence spectra showed that upon addition of F-, the emission intensities enhanced significantly without any change in the excited and emission wavelengths, suggesting a potential photoinduced electronic transfer ( PET) signaling transduction mechanism. An easy-to-prepare test paper which was obtained by putting a filter paper into an acetonitrile solution of 1, can detect F- in aqueous media, indicating the potential application for detecting F- in natural aqueous environments without any spectroscopic instrumentation. Spectroscopic titrations of the free ligand were also studied for comparison.
机译：制备了高选择性和灵敏的发色和荧光双信号响应氟化物传感器1，该传感器包含Ru-bipy荧光团（bipy = 2,2'-联吡啶）和2,4-二硝基苯基hydr发色团，并进行了光谱表征。用F进行的Uv-vis滴定揭示了一个新的强吸收带的出现，该吸收带集中在约580 nm处，伴随着颜色从黄色到品红色的剧烈变化，缔合常数logK为6.71 +/- 0.04。荧光光谱表明，加入F-后，发射强度显着增强，而激发和发射波长没有任何变化，表明潜在的光诱导电子转移（PET）信号转导机制。通过将滤纸放入1的乙腈溶液中获得的易于制备的试纸可以检测水性介质中的F-，这表明在不使用任何光谱仪器的情况下在天然水性环境中检测F-的潜在应用。还研究了游离配体的光谱滴定以进行比较。

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