苯并咪唑类荧光探针的合成及离子选择性研究

Synthesis and Ion Selection of Benzimidazole Fluorescent Probes

以2-氨基苯并咪唑和邻羟基萘甲醛为原料合成了苯并咪唑席夫碱类荧光探针,并利用红外光谱和核磁氢谱对其结构进行了表征,通过荧光光谱研究了探针对不同金属离子的识别作用。结果表明:Zn^(2+)离子的加入不仅使探针荧光强度显著增强,而且溶液荧光颜色由弱黄色变为强绿色,说明探针对Zn^(2+)离子具有专一识别能力。同时,干扰实验表明探针对Zn^(2+)离子的识别具有良好的抗干扰能力。

Benzimidazole Schiff base fluorescent probes were synthesized from^(2)-aminobenz-imidazole and o-hydroxynaphthalene formaldehyde.Their structures were characterized by IR and 1H NMR.The recognition of different metal ions by the probes was studied by fluorescence spectroscopy.The results showed that the addition of Zn^(2+)ions not only significantly enhanced the fluorescence intensity of the probe,but also changed the fluorescence color of the solution from weak yellow to strong green,indicating that the probe hada specific recognition ability for Zn^(2+)ions.At the same time,the interference experiment showed that the probe had good anti-interference ability for the recognition of Zn^(2+)ions.