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
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
复制标题
在有和没有紫外线照射的情况下，使用单一罗丹明腙型探针选择性和差异检测 Hg2 和 Cu2
DOI：
10.1016/j.dyepig.2018.02.013
复制
发表时间：
2018-06-01
影响因子：
4.5
通讯作者：
Zheng, Ming-Ming
中科院分区：
文献类型：
--
作者：
Chang, Li-Li;Gao, Qiang;Zheng, Ming-Ming
基于单根罗丹明腙型探针在紫外光照射下对Hg ~（2+）和Cu ~（2+）识别行为的差异，研制了一种新型的多离子响应化学传感器，用于Hg ~（2+）和Cu ~（2+）的选择性和差异性检测。该探针通过罗丹明B酰肼、4-羟基苯甲醛和丙烯酰基的简单化学键合成。在无紫外光照射的条件下，该探针能以较高的灵敏度（检测限：7.1 × 10 ~（-8）M）选择性地检测Hg ~（2+），且该过程可直接用肉眼监测。有趣的是，当在紫外线照射下向探针溶液中加入各种金属离子时，发现只有Cu 2+离子，即使在1.5 × 10（-7）M的浓度下，也会引起显著的光致变色沿着明显的颜色变化。利用这种光致变色的高选择性和灵敏度，建立了一种在紫外光照射下检测Cu 2+的比色传感方法。用Br-作掩蔽剂，可消除Hg ~（2+）对Cu ~（2+）的干扰，实现了Hg ~（2+）和Cu ~（2+）共存时的区分。
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.