A reliable amplified fluorescence-enhanced chemosensor (Eu-MIL-61) for the directional detection of Ag+ in an aqueous solution. Issue 3 (22nd December 2016)

• Record Type: Journal Article
• Authors: Sun, Nana; Yan, Bing
• Is Part Of: Dalton transactions. Volume 46:Issue 3(2017)
• Page Start: 875
• Page End: 881
• Publication Date: 2016-12-22
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c6dt04335f
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A simple and reliable PL probe was designed and prepared to detect Ag + in the aqueous environment by encapsulating excellent Eu 3+ into MIL-61. Abstract : A robust gallium carboxylate Ga(OH)(btec)·0.5H2 O (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 Eu 3+ . 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.