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设计合成了一种基于新型香豆素水合肼希夫碱荧光探针,结构经1H NMR表征.利用荧光光谱研究了该探针分子对铜离子的识别作用.实验表明,该探针对铜离子具有较好的选择性识别能力,加入铜离子后,该探针的荧光发射强度显著减弱,并且荧光发射强度随着Cu2+浓度的增加而减弱.通过荧光离子滴定实验对其选择性和抗干扰能力进行了系统研究,发现加入其他常见金属离子(如Al3+、Ca2+、Co2+、Cr3+、Fe3+、K+、Mg2+、Na+、Ni2+、Zn2+等),荧光强度没有发生变化,并且上述各种离子分别与铜离子共存时,对其没有干扰.结果表明,香豆素水合肼希夫碱荧光探针对铜离子具有较高选择性识别.
A novel coumarin fluorescent probe based on the novel coumarin hydrazines was designed and synthesized. The structure was characterized by 1H NMR. The recognition effect of the probe molecule on copper ions was studied by fluorescence spectroscopy. Experiments show that the probe is sensitive to copper ions Has better selective recognition ability, and the fluorescence emission intensity of the probe is significantly weakened after the addition of copper ions, and the fluorescence emission intensity is weakened with the increase of the Cu2 + concentration.Through the fluorescence ion titration experiment, its selectivity and anti-interference ability The results showed that the fluorescence intensity did not change when adding other common metal ions such as Al3 +, Ca2 +, Co2 +, Cr3 +, Fe3 +, K +, Mg2 +, Na +, Ni2 +, Zn2 + When coexisting, it did not interfere with it.The results showed that the coumarin hydrazine hydrate Schiff base fluorescence probe has a high selective recognition of copper ions.