两个新型1,3-硒唑酰腙的合成及其对醋酸根离子的特性荧光识别

设计合成了2个1,3-硒唑酰腙分子(SAF1和SAF2),并通过红外光谱(IR)和核磁共振谱(NMR)等对其进行了结构表征。 通过紫外-可见光谱(UV-Vis)和荧光光谱,利用探针SAF1和SAF2分别对9种常见的阴离子进行了监测。 结果发现,当加入醋酸根离子(AcO^-)时,在UV-Vis中,探针SAF1和SAF2分别在500 nm和414 nm处出现一个新的吸收峰,探针SAF1对应的溶液颜色由淡黄色变为红色,探针SAF2对应的溶液颜色由浅黄色变为黄色,可实现裸眼识别;在荧光光谱中,417 nm附近产生强的荧光发射峰,且具有荧光开启(turn-on)功效,AcO^-的最低检测限达10^-5 mol/L,2个分子与AcO^-的结合常数分别为3.03×10⁴和1.42×10⁴ L/mol,说明化合物SAF1和SAF2有望作为AcO^- 的特性荧光识别探针。

Synthesis of Two Novel 1,3-Selenazole Carbonyl Hydrazones and Their Specific Fluorescent Recognition Toward Acetate Ions

Two novel 1,3-selenazole carbonyl hydrazones(SAF1, SAF2) were synthesized and their structures were confirmed by infrared spectrometry and nuclear magnetic resonance. Monitoring of nine common anions using probes SAF1 and SAF2 was performed via ultraviolet-visible and fluorescent spectra. When acetate ions(AcO^-) were added, a new absorption peak of SAF1 and SAF2 was found at 500 nm and 414 nm, respectively. The color of SAF1 and SAF2 solutions changed from pale yellow to red and yellow, respectively. These results show naked eye identification of AcO^-. In fluorescent spectra, a strong emission peak at 417 nm is found with the turn-on effect. The lowest limit of detection for AcO^- reaches 10^-5 mol/L. The binding constants of SAF1 and SAF2 with AcO^- are 3.03×10⁴ and 1.42×10⁴ L/mol, respectively. SAF1 and SAF2 are expected to be specific fluorescent probes toward AcO^-.