Selective and differential detection of Hg2+ and Cu2+ with use of a single rhodamine hydrazone-type probe in the absence and presence of UV irradiation

文献类型： 外文期刊

第一作者： Chang, Li-Li

作者： Chang, Li-Li;Gao, Qiang;Hu, Ce-Ce;Zhou, Wen-Jun;Zheng, Ming-Ming;Liu, Shu

作者机构：

关键词： Multi-ion-responsive; Rhodamine hydrazone; Detection and discrimination; Hg2+ and Cu2+

期刊名称：DYES AND PIGMENTS （ 影响因子：4.889； 五年影响因子：4.016 ）

ISSN： 0143-7208

年卷期： 2018 年 153 卷

页码：

收录情况： SCI

摘要： A new multiple-ion-responsive chemosensor was developed for the selective and differential detection of Hg2+ and Cu2+, based on the completely different ions recognition behaviors of the single rhodamine hydrazone-type probe In the absence and presence of UV irradiation. The probe was synthesized through simple chemical linkages of rhodamine B hydrazide, 4-hydroxybenzaldehyde, and acryloyl group. In the absence of UV irradiation, this probe could selectively sense Hg2+ in the presence of other metal ions by colorimetric and fluorescent responses with considerably high sensitivity (limit of detection: 7.1 x 10(-8) M), and the process could be monitored directly by the naked eye. Intriguingly, when adding various metal ions to the probe solution under UV irradiation, only the Cu2+ ion, even at a concentration of 1.5 x 10(-7) M, was found to induce a significant photochromism along with distinct color change. Benefiting from the high selectivity and sensitivity of such a photochromism, a convenient colorimetric sensing method for detection of Cu2+ in presence of UV irradiation was also established. Furthermore, we demonstrated that the interference of Hg2+ on Cu2+ could be easily eliminated by employing Br- as a masking agent, and subsequently the discrimination of Hg2+ and Cu2+ under their coexistence was achieved.

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