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Ir(iii) complex-based phosphorescence and electrochemiluminescence chemodosimetric probes for Hg(ii) ions with high selectivity and sensitivity

机译:IR(III)基于复合物的磷光和电化学发光的HG(II)离子具有高选择性和灵敏度的离子探针

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摘要

Mercury, one of the most prevalent toxic metal elements, poses severe risks to human health and the environment. Several molecular probes have been developed for colorimetric and fluorometric detection of Hg(ii) ions. Nevertheless, development of a rapid, selective, and sensitive probe for Hg(ii) ions remains important. Herein, we report three Ir(iii) complex-based phosphorescence and electrochemiluminescence chemodosimeters for the selective detection of Hg(ii) ions. The acetylacetonate ancillary ligand of probe 1 reacts selectively with the Hg(ii) ion, inducing phosphorescence enhancement with a concomitant blue-shift. Meanwhile, the Hg(ii) ion selectively quenches the phosphorescence of probe 2. Probes 1 and 2 showed low detection limits (LOD) of 73 and 160 nM, respectively. In addition, the Hg(ii) ion level was successfully monitored by the electrochemiluminescence decrement of probe 9 with a good linear correlation between 0 and 40 M, with a detection limit of 170 pM.
机译:汞是最普遍的有毒金属元素之一,对人类健康和环境产生严重风险。 已经开发了几种分子探针用于对色度和荧光检测HG(II)离子进行比色和缺水检测。 然而,开发用于HG(II)离子的快速,选择性和敏感的探针仍然很重要。 在此,我们报告了三种IR(III)复合物的磷光和电化学发光化学计,用于选择性检测HG(II)离子。 探针1的乙酰丙酮酸酐配体用Hg(II)离子选择性反应,诱导磷光增强,伴随的蓝换点。 同时,Hg(ii)离子选择性地淬灭探针2的磷光。探针和2分别显示出73和160nm的低检测限率(LOD)。 此外,通过探针9的电化学发光递减成功监测HG(II)离子水平,在0至40μm之间具有良好的线性相关性,检测限为170μm。

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