A “turn-on” ESIPT fluorescence probe of 2-(aminocarbonyl)phenylboronic acid for the selective detection of Cu(<scp>ii</scp>)
Dandan Jiang, Minghao Zheng, Xiaoyang Yan, Bin Huang, Hui Huang, Tianhao Gong, Kunming Liu, Jin‐Biao Liu
Abstract
Herein, we report a highly selective fluorescent probe for the detection of Cu(ii). The detection mechanism relies on the Cu(ii)-catalyzed oxidative hydroxylation of 2-(aminocarbonyl)phenylboronic acid into salicylamide, thus recovering the excited-state intramolecular proton transfer (ESIPT) effect and inducing more than 35-fold fluorescence enhancement. The simple structure and readily available fluorescent probe give a novel method for quantitatively detecting Cu(ii) in the linear range of 0-22 μM, with a limit of detection down to 68 nM, and exhibiting high selectivity for Cu(ii) over 16 other metal ions.
Topics & Concepts
Phenylboronic acidChemistryFluorescenceTurn (biochemistry)Combinatorial chemistryOrganic chemistryBiochemistryCatalysisQuantum mechanicsPhysicsMolecular Sensors and Ion DetectionElectrochemical Analysis and ApplicationsAnalytical chemistry methods development