A reversible fluorescence "off-on-off" sensor for sequential detection of aluminum and acetate/fluoride ions
A reversible fluorescence "off-on-off" sensor for sequential detection of aluminum and acetate/fluoride ions
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DOI：
10.1016/j.talanta.2015.05.053
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发表时间：
2015-11-01
期刊：
影响因子：
6.1
通讯作者：
Singh, Ashok Kumar
中科院分区：
文献类型：
--
作者：
Gupta, Vinod Kumar;Mergu, Naveen;Singh, Ashok Kumar
合成了一种新的罗丹明功能化荧光席夫碱CS，并研究了其对各种金属离子的比色和荧光响应。在其他竞争金属离子存在下，该传感器对Al~(3+)具有高选择性和高灵敏度的比色响应和“关-开”荧光响应。这些光谱变化在光谱的可见光区域足够大，因此可以用肉眼进行探测。研究证明，CS-Al~(3+)络合物的形成是完全可逆的，可以通过解离作用与ACO-/F~-反应。结果表明，该传感器为Al3+和ACO-/F-的顺序检测提供了荧光“关-开-关”的策略。(C)2015爱思唯尔公司版权所有。
A new rhodamine functionalized fluorogenic Schiff base CS was synthesized and its colorimetric and fluorescence responses toward various metal ions were explored. The sensor exhibited highly selective and sensitive colorimetric and "off-on" fluorescence response towards Al3+ in the presence of other competing metal ions. These spectral changes are large enough in the visible region of the spectrum and thus enable naked-eye detection. Studies proved that the formation of CS-Al3+ complex is fully reversible and can sense to AcO-/F- via dissociation. The results revealed that the sensor provides fluorescence "off-on-off' strategy for the sequential detection of Al3+ and AcO-/F-. (C) 2015 Elsevier B.V. All rights reserved.