Amino-Functionalized Metal-Organic Frameworks Nanoplates-Based Energy Transfer Probe for Highly Selective Fluorescence Detection of Free Chlorine

Analytical Chemistry
Ting LuYi Lv

Abstract

Novel highly fluorescent NH2-MIL-53(Al) was controllably synthesized by a facile one-step hydrothermal treatment of AlCl3·6H2O and NH2-H2BDC in water with urea as a modulator. The as-synthesized NH2-MIL-53(Al) nanoplates exhibited excellent water solubility and stability. In the present work, it can be found that strong fluorescence of NH2-MIL-53(Al) nanoplates was significantly suppressed after the addition of free chlorine, and a simple sensing system for fast, highly selective direct detection of free chlorine in water was established. Compared with other fluorescent sensors for free chlorine, the present methodology has a comparable detection limit of 0.04 μM (S/N = 3) and a wide detection range of 0.05 to 15 μM. On the other hand, the traditional redox-based fluorescent probes sharply suffered from the interference of MnO4(-), Cr2O7(2-), and other oxidants with stronger oxidation capability than free chlorine while ours overcame this disadvantage. Further research suggests that it is more likely the energy transfer through N-H···O-Cl hydrogen bonding interaction between amino group and ClO(-) ions plays the key role in our system, providing a new and promising platform for free chlorine determination in water quality monit...Continue Reading

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Citations

Jul 4, 2019·Luminescence : the Journal of Biological and Chemical Luminescence·Chunlei MaQi Wang
Dec 13, 2019·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Li YangLi Wang
Jul 3, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Yong-Nian ZengZu-Jin Lin
Jul 30, 2019·Critical Reviews in Analytical Chemistry·Peihong TongJianping Li
Aug 28, 2019·Talanta·Humayun KabirI Francis Cheng
Jun 3, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Zixuan LiJinhuai Liu
Jan 15, 2019·Journal of Agricultural and Food Chemistry·Chunhua LiZhonghong Li
Jul 25, 2019·ACS Applied Materials & Interfaces·Shengmei ZhuGuangfeng Wang
Dec 16, 2020·Analytical Chemistry·Ming ZhouHuijun Zhao
Sep 9, 2021·Luminescence : the Journal of Biological and Chemical Luminescence·Yang LiuXinfeng Zhang

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