Ratiometric Nanosensor for Visual Detection of Copper Ions
Ratiometric Nanosensor for Visual Detection of Copper Ions
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用于铜离子视觉检测的比率纳米传感器
DOI：
10.14233/ajchem.2014.16512
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发表时间：
2014-08
影响因子：
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通讯作者：
Shengda Qi, Cuiling Ren*, Yanping Chang, Hongli C
中科院分区：
文献类型：
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作者：
Shengda Qi, Cuiling Ren*, Yanping Chang, Hongli C
本文简单、经济地合成了一种新型比率荧光纳米传感器，并将其应用于水样中Cu 2+的检测。该纳米传感器是一种由二氧化硅包覆的红色CdTe量子点和谷胱甘肽修饰的绿色CdTe量子点组成的双发射量子点。该探针对Cu ~（2+）的动态响应范围为6.7 × 10 ~（-8）~ 8 × 10 ~（-7）mol L ~（-1），检出限为2.5 × 10 ~（-8）mol L ~（-1）。其它碱金属、碱土金属和过渡金属离子如K+、Na+、Mg 2+、Zn 2+、Pb 2+、Ni 2+、Cr 3+和Fe 3+对Cu 2+的测定无明显干扰。在紫外光照射下，Cu 2+与纳米传感器的结合使溶液的颜色由绿色变为橙子，说明该传感器可实现对Cu 2+的视觉检测。
In this paper, a new ratiometric fluorescent nanosensor was synthesized simply and economically and applied for Cu2+ detection in water samples. This nanosensor was a type of dual-emission quantum dots which was composed silica coated red CdTe quantum dots and glutathione modified green CdTe quantum dots. The probe exhibits a dynamic response range for Cu2+ from 6.7 x 10(-8) to 8 x 10(-7) mol L-1 with a detection limit of 2.5 x 10(-8) mol L-1. Other alkali, alkaline earth and transitional metal ions including K+, Na+, Mg2+, Zn2+, Pb2+, Ni2+, Cr3+ and Fe3+ had no significant interferences on Cu2+ determination. Binding Cu2+ to the nanosensor make the colour of the solution change from green to orange under UV light irradiation, which illustrates that this new sensor can realize visually detection of Cu2+.