基于咔唑-席夫碱的高选择性裸眼和荧光识别Cu2+的探针
收稿日期: 2016-11-12
修回日期: 2016-12-26
网络出版日期: 2017-01-17
基金资助
辽宁省自然科学基金（No.20102126）资助项目.
Highly Selective Naked-Eye and Fluorescence Probe for Cu2+ Based on Carbazole Schiff-Base
Received date: 2016-11-12
Revised date: 2016-12-26
Online published: 2017-01-17
Supported by
Project supported by the Natural Science Foundation of Liaoning Province (No. 20102126).
合成了一种新型基于咔唑-席夫碱识别Cu2+的荧光探针L. 利用紫外-可见和荧光光谱研究了探针L对阳离子的识别性能. 实验结果显示，当加入Cu2+时，探针L的CH3CN溶液显示出明显的颜色变化，由黄色变为无色. 这表明，利用探针L可裸眼识别Cu2+. 通过荧光光谱分析实验发现，在CH3CN溶剂中，探针L对Cu2+具有较高的选择性和灵敏度，其荧光强度随着Cu2+的浓度增大而逐渐增强，不受其它金属离子影响，抗干扰能力强. 探针L与Cu2+的结合常数为1.38×104 L/mol，检测限为2.34×10-7 mol/L，低于世界卫生组织（WHO）规定的饮用水中Cu2+的最大含量20 mmol/L. 探针L在检测环境中的Cu2+含量方面具有潜在应用价值.
李英俊 , 李继阳 , 许永廷 , 靳焜 , 曹欣 . 基于咔唑-席夫碱的高选择性裸眼和荧光识别Cu2+的探针[J]. 有机化学, 2017 , 37(4) : 896 -901 . DOI: 10.6023/cjoc201611014
A new fluorescence probe L based on carbazole Schiff-base for Cu2+ was synthesized. The recognition ability of probe L to metal ions was investigated by UV-Vis and fluorescence spectra. The experimental results showed that the probe L in CH3CN displayed a distinct color change from yellow to colorless upon the addition of Cu2+, which can be directly detected by the naked eye for Cu2+. The fluorescence spectra showed that the probe L had high selective and sensitive recognition toward Cu2+ in CH3CN, the fluorescence intensity was increased with the increase of Cu2+ concentration, and it was not affected by other metal ions. The association constant between the probe L and Cu2+ was detected to be 1.38×104 L/mol and the corresponding detection limit was calculated to be 2.34×10-7 mol/L. The detection limit of L for Cu2+ was far lower than the maximum allowable level of the WHO limit (20 mmol/L) for drinking water. The results indicate that the probe L should be applicable to the research on the environmental applications associated with Cu2+.
Key words： carbazole; Schiff base; naked-eye recognition; Cu2+ fluorescence probe
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