title: A reliable amplified fluorescence-enhanced chemosensor (Eu-MIL-61) for the directional detection of Ag+in an aqueous solution.
abstract: A robust gallium carboxylate Ga(OH)(btec)·0.5H2O (MIL-61) was synthesized under mild hydrothermal conditions and selected as the parent MOF to prepare Eu-MIL-61 by post-synthetic modification due to the uncoordinated carbonyl group of the ligand (pyromellitic acid (H4btec)). The firm framework, permanent porosity, and non-coordinated sites make MIL-61 a good scaffold for immobilizing and sensitizing Eu3+. The products showed excellent luminescence and, more significantly, Eu-MIL-61 showed excellent selectivity with photoluminescence enhancement, fast response time, and low detection limit for Ag+ions in the aqueous solutions. In addition, the frameworks were not susceptible to the acid-base property of solutions, which can be further applied to monitor the concentration of Ag+in several daily water samples.
authors.affiliation: Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, P. R. China. byan@tongji.edu.cn.
authors.forename: Nana
authors.initials: N
authors.lastname: Sun
authors.affiliation: Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, P. R. China. byan@tongji.edu.cn.
authors.forename: Bing
authors.identifier: http://orcid.org/0000-0002-0216-9454
authors.initials: B
authors.lastname: Yan