Abstract
To achieve a lower detection limit has always been a goal of analytical chemists.Herein,we demonstrate the first picomolar level detection capability for Fe3+ion via luminescence detection technology.The re-sults of structural analysis and theoretical calculation show that Fe3+ions are adsorbed on the central node of Eu-DBM(DBM=dibenzoylmethane)sensor in the form of single ion at ultralow concentration.Subsequently,the pathways of photo-induced charge and energy transfer of the obtained Eu-DBM@Fe3+material have been changed,from the initial DBM-to-Eu3+before Fe3+adsorption to the ultimate DBM-to-Fe3+after adsorption process,which quenches the luminescence of Eu3+ion.This work not only ob-tains the highly sensitive luminescence detection ability,but also innovatively proposes the single-ion adsorption mechanism,both of which have important scientific and application values for the develop-ment of more efficient detection agents in the future.
基金项目
国家自然科学基金(22075071)
Harbin Manufacturing Science and Technology Innovation Talent Project(2022CXRCCG016)
Outstanding Youth science Foundation of Heilongjiang University(JCL202002)
Special Project of Joint Dairy College in East University of Heilongjiang-National Dairy Engineering and Technology Research Cen(LHXYDS202001)
NETL
NSTL
万方数据