通过席夫碱缩合反应策略,成功合成了2种新颖的稠杂环结构氨基硫脲类席夫碱型荧光离子探针M1与M2。为验证化合物M1与M2的分子结构,采用红外光谱(IR)、核磁共振氢谱(¹HNMR)、核磁共振碳谱(¹³CNMR)以及高分辨质谱(HRMS)进行表征。通过紫外光谱法和荧光光谱法研究了M1和M2对金属离子的识别特性。实验发现,M1和M2能对汞离子进行选择性识别,并伴随着明显的颜色变化和荧光完全淬灭,且其他共存金属离子对其干扰较小。M1和M2的检出限分别为6.79×10^-7、5.81×10^-7 mol/L(通过3σ法则计算)。

Two novel fluorescent ion probes,M1 and M2,belonging to the class of thiosemicarbazone-based Schiff bases with fused-heterocyclic structure,are successfully synthesized via Schiff base condensation reaction strategy.To validate the molecular structure of M1 and M2,comprehensive characterization is performed by means of infrared spectroscopy (IR),proton nuclear magnetic resonance (¹HNMR),carbon-13 nuclear magnetic resonance (¹³CNMR),and high-resolution mass spectrometry (HRMS).The recognition properties of M1 and M2 to metal ions are studied through UV-Vis spectroscopy and fluorescence spectroscopy.Experimental results reveal that both M1 and M2 can selectively identify mercury ions (Hg²⁺),accompanied with distinct color changes and complete fluorescence quenching.Notably,their performance is hardly interfered by the presence of other coexisting metal ions.Furthermore,the limits of detection (LODs) for M1 and M2 to mercury ions are 6.79×10^-7 mol·L^-1 and 5.81×10^-7 mol·L^-1,respectively,calculated according to the 3σ rule.

史天柱(1989-),男,博士,副教授,研究方向为功能有机小分子的制备及应用,通讯联系人,shitianzhu1018@163.com。