一种具有AIE+ESIPT双重属性的席夫碱类荧光探针的合成及在铜离子检测中的应用  

Synthesis of a Schiff base fluorescent probe with the dual properties of aggregation-induced luminescence(AIE)+excited intramolecular proton transfer(ESIPT)and its application in copper ion detection

作　　者：张晓文 刘斌[1] ZHANG Xiaowen;LIU Bin(Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province,Key Laboratory of Chemical Biology and Molecular Engineering of Education Ministry,Institute of Molecular Science,Shanxi University,Taiyuan 030006,China)

机构地区：[1]山西大学分子科学研究所,化学生物学与分子工程教育部重点实验室,能量转换与存储材料山西省重点实验室,太原030006

出　　处：《分析试验室》2024年第7期1011-1016,共6页Chinese Journal of Analysis Laboratory

基　　金：2023年度山西省高等学校科技创新项目(2023L0009);2023年度山西省研究生教育教学改革课题(2023JG003)资助。

摘　　要：设计合成了一种具有聚集诱导发光(AIE)和激发态分子内质子转移(ESIPT)双重属性的席夫碱类荧光探针1。该探针在聚集态下发橙色荧光并表现出较大的斯托克斯(Stokes)位移。实验结果表明,探针1对Cu^(2+)有较高的选择性和灵敏度,检测限为95 nmol/L。Job’s plot曲线分析和质谱结果表明,探针1和Cu^(2+)结合形成1∶1的配合物,阻断了分子原有的ESIPT过程,最终导致荧光淬灭。该探针可用于实际水样中Cu^(2+)的检测。A Schiff base fluorescent probe 1 with the dual properties of aggregation-induced luminescence(AIE)and excited intramolecular proton transfer(ESIPT)was designed and synthesized. The probe emits orange fluorescence in the aggregated state and exhibits a largeStokes shift. The experimental results confirmed that probe 1 showed a high selectivity andsensitivity for Cu^(2+). The limit of detection was calculated to be 95 nmol/L. Job's plot and massspectrometry results indicated that probe 1 and Cu^(2+) formed a 1:1 complex, which blocks theoriginal ESIPT process of the molecule and ultimately leads to fluorescence quenching. Thisprobe can be used for the detection of Cu^(2+) in actual water samples.

关 键 词：聚集诱导发光(AIE) 激发态分子内质子转移(ESIPT) 荧光探针 Cu^(2+) 

分 类 号：O657.3[理学—分析化学]