摘要
连续识别型荧光探针能在同一测试条件下连续识别两种离子,使得离子的检测更具专一性,是在普通同类型探针检测功能方面的拓展。设计合成了以7-二乙氨基香豆素为母体、咪唑-2-甲醛为识别基团的一种高选择性的席夫碱型荧光探针CI,用于连续识别Cu^(2+)和焦磷酸根离子(PPi)。探针CI对Cu^(2+)表现出了明显的“开-关”荧光淬灭响应,淬灭率为100%,而形成的配合物CI-Cu^(2+)对PPi呈现明显的“关-开”荧光增强响应。探针CI对Cu^(2+)和PPi的检出限均为0.14μmol/L,其与Cu^(2+)的配位比为1∶1,而CI-Cu^(2+)配合物与PPi以2∶1配位。在pH 5~11的范围内,探针CI和CI-Cu^(2+)具有很好的识别能力。
Sequential recognition fluorescent chemical probe is able to identify two different ions continuously under the same condition,making the ion detection more specific,which is an extension of the detection function of common probes of the same type.In this study,a highly selective Schiff base fluorescent probe CI was synthesized with 7-diethylaminocoumarin as the parent and imidazole-2-carboxaldehyde as the recognition group for sequential recognition of Cu^(2+) and PPi.The probe CI showed an obvious“on-off”fluorescence quenching response to Cu^(2+) with an efficiency of 100%,and the CI-Cu^(2+) complex showed an“off-on”response to PPi fluorescence enhancement.The detection limit of probe CI for Cu^(2+) and PPi was 0.14μmol/L.The binding capacity of probe CI and Cu^(2+) was 1∶1,while the binding capacity of CI-Cu^(2+) complex and PPi was 2∶1.Over pH range 5~11,both probes CI and CI-Cu^(2+) are both of high recognition performance.
作者
李生玲
常西亮
孔祥鹏
成果
王明亚
LI Sheng-ling;CHENG Xi-liang;KONG Xiang-peng;CHENG Guo;WANG Ming-ya(Department of Chemistry and Chemical Engineering,Taiyuan Institute of Technology,Taiyuan 030008,China;School of Chemical Engineering and Technology,North University of China,Taiyuan 030051,China)
出处
《化学试剂》
CAS
北大核心
2022年第3期427-435,共9页
Chemical Reagents
基金
山西省“1331”工程资助项目(晋教科〔2021〕2号)。
