大连工业大学学报2026，Vol.45Issue(1)：59-68,10.DOI:10.19670/j.cnki.dlgydxxb.2026.0107
基于Eu(TMA)phen的离子检测荧光探针
Fluorescent probes for ions detection based on Eu(TMA)phen
摘要
Abstract
To address the limitations of existing heavy metal ions detection methods,such as cumbersome operation and bulky equipment,a rare-earth complex fluorescent probe capable of simultaneously detecting Fe3+and Cr3+with high sensitivity was developed.Using Eu3+as the luminescent center,1,3,5-benzenetricarboxylic acid(TMA)and phenanthroline(phen)as ligands,Eu(TMA)phen powders were prepared via the co-precipitation method.The morphology,structure,and optical properties of the powders were characterized by SEM,XRD,FT-IR,thermogravimetric analysis and fluorescence spectroscopy,and fluorescence sensing experiments were conducted to evaluate their detection performance for Fe3+and Cr3+.The results showed that the Eu(TMA)phen powders exhibited petal-like grains with good crystallinity.Eu3+formed stable coordination with the ligands,and the powders possessed excellent thermal stability,emitting Eu3+-characteristic red light under UV excitation.Fe3+caused overall fluorescence quenching of the powders,with a detection limit as low as 0.91 μmol/L.Cr3+changed the fluorescence color of the powders from red to light blue,which could be detected via the fluorescence peak ratio F468/F616,with a detection limit of 1.35 μmol/L.In addition,the powders had good stability in water,by only 3.5％decrease in fluorescence intensity after 2 d of immersion.Eu(TMA)phen powders have high selectivity and sensitivity for Fe3+and Cr3+,providing a new type of rare-earth complex material and a practical scheme for the detection of trace heavy metal ions.关键词
荧光传感探针/离子检测/稀土配合物/铁离子/铬离子Key words
fluorescent sensing probe/ion detection/rare earth complexes/Fe3+/Cr3+分类
通用工业技术引用本文复制引用
赵光旭,姚知宏,张晶晶..基于Eu(TMA)phen的离子检测荧光探针[J].大连工业大学学报,2026,45(1):59-68,10.基金项目
辽宁省教育厅基本科研项目(LJ212410152031) （LJ212410152031）
辽宁省自然科学基金项目(2023-MS-282). （2023-MS-282）
