A dual-emitting mixed-lanthanide MOF with high water-stability for ratiometric fluorescence sensing of Fe3+ and ascorbic acid. Issue 2 (10th December 2020)

• Record Type: Journal Article
• Authors: Yu, Haihuan; Liu, Qun; Li, Jiao; Su, Zhong-Min; Li, Xiao; Wang, Xinlong; Sun, Jing; Zhou, Chen; Hu, Xiaoli
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 2(2021)
• Page Start: 562
• Page End: 568
• Publication Date: 2020-12-10
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0tc04781c
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : A novel Eu0.07 Gd0.03 -MOF with high water stability, which can serve as ratiometric fluorescence sensor for "color-change-recover" detection of Fe 3+ and ascorbic acid in an aqueous environment. Abstract : Herein, we design and prepare a dual-emitting lanthanide metal–organic framework (Eu0.07 Gd0.03 -MOF ) based on functionalized ligands, which can be developed as a ratiometric sensor. This self-calibrated material not only displays high water stability but also offers a highly sensitive and color change detection of Fe 3+ and ascorbic acid at a low limit of detection. Moreover, water stability surveys for Eu0.07 Gd0.03 -MOF indicate that it maintains structural stability and displays at least 90.4% and 87.5% fluorescence intensity after storage in water for 28 days in water at 70 °C for 6 days, as well as in acidic-basic solutions of broad pH range (3–11) for four days. More importantly, the low concentration range of Fe 3+ and ascorbic acid can be estimated by the ratios of ligand-based emission as an internal reference and Eu 3+ -based emission as the indicator, thus yielding a visually discernible "color-change-recover" effect.