Abstract

A novel conjugated Schiff base-based chemosensor DAP, N′-((1E,2E)-3-(4-(dimethylamino)phenyl)allylidene)-3-nitrobenzohydrazide, has been synthesized. DAP showed significant selectivity toward mercury ion by color change of pale yellow to orange. Detection limit was 0.11 μM, which is lower than the value (2.48 μM) recommended by Health Canada. DAP could recognize and quantify mercury ion in real water samples. The binding mode of DAP and Hg²⁺ was demonstrated, based on Job plot, IR spectra and ESI-MS.

Graphic abstract

A novel conjugated Schiff base-based chemosensor DAP was developed for the detection of mercury ion by color change of pale yellow to orange. DAP with low detection limit (0.11 μM) could quantify mercury ion in real water samples.

中文翻译：

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基于共轭席夫碱的化学传感器，用于选择性检测汞离子

摘要

合成了一种新型的基于共轭席夫碱的化学传感器DAP，N '-（（（1E，2E）-3-（4-（二甲基氨基）苯基）亚烷基）-3-硝基苯并酰肼。DAP通过从浅黄色变为橙色的颜色显示出对汞离子的显着选择性。检测限为0.11μM，低于加拿大卫生部建议的值（2.48μM）。DAP可以识别和量化真实水样中的汞离子。基于作业图，红外光谱和ESI-MS，证明了DAP和Hg ²⁺的结合方式。

图形摘要

开发了一种新型的基于希夫碱的共轭化学传感器DAP，用于通过浅黄色到橙色的颜色变化来检测汞离子。低检测限（0.11μM）的DAP可以定量分析真实水样中的汞离子。