Highly sensitive and specific uranyl ion detection by a fluorescent sensor containing uranyl-specific recognition sites  

含特异性铀酰识别位点的荧光传感器用于环境铀污染的特异性高灵敏检测

作　　者：Tiantian Feng Shilei Zhao Meng Cao Xinfeng Du Hui Wang Xuewen Cao Lijuan Feng Yihui Yuan Ning Wang 冯甜甜;赵石磊;曹猛;都新丰;王慧;曹雪雯;冯莉娟;袁益辉;王宁

机构地区：[1]State Key Laboratory of Marine Resource Utilization in South China Sea,Collaborative Innovation Center of Marine Science and Technology,Hainan University,Haikou 570228,China

出　　处：《Science Bulletin》2025年第1期70-77,共8页科学通报(英文版)

基　　金：supported by the National Natural Science Foundation of China(U2167220,22327807,and U23A20104);the Hainan Province Science and Technology Special Fund(ZDYF2024SHFZ066);the National Key Research and Development Program of China(2023YFC2809000);the specific research fund of the Innovation Platform for Academicians of Hainan Province(YSPTZX202214 and YSPTZX202316);the Innovation Fund for Scientific and Technological Personnel of Hainan Province(KJRC2023B01)。

摘　　要：Uranium pollution has become a serious threat to human health and environmental safety,making the detection of environmental uranium contamination of great importance.The sensitive and specific detection of uranyl ions,which are the dominant form of uranium in the environment,depends on the specific recognition of uranyl ions by chemical groups.In this study,a novel fluorescent sensor containing a highly specific uranyl ion recognition group is synthesized via the reaction of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide(EDC)and 1,1,2,2-tetra(4-carboxylphenyl)ethylene(TPE-(COOH)4).Owing to the effects of aggregation-induced emission(AIE)and intramolecular charge transfer(ICT),the fluorescent sensor,named TPE-EDC,exhibits significant fluorescent properties in aqueous environments.The binding of uranyl ions by specific recognition groups in TPE-EDC leads to a decrease in the ICT effect,thus causing a significant reduction in the emission intensity of TPE-EDC.The attenuation of the fluorescence intensity of TPE-EDC shows an excellent linear relationship with an increase in uranyl ion concentration.TPE-EDC exhibits ultra-sensitive and ultra-selective detection ability for uranyl ions with an ultra-low detection limit of 69 pmol/L and an ultrashort response time of 30 s.These high detection performances render the fluorescent sensor TPE-EDC a promising candidate for early warning of uranium pollution.

关 键 词：URANIUM DETECTION SPECIFICITY RECOGNITION Intramolecular charge transfer 

分 类 号：X837[环境科学与工程—环境工程] TP212[自动化与计算机技术—检测技术与自动化装置] TL21[自动化与计算机技术—控制科学与工程]