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Highly selective and sensitive long fluorescence lifetime polyurethane foam sensor based on Tb-complex as chromophore for the detection of H2PO4- in water.

Authors
  • Su, Yan1
  • Zhang, Dan1
  • Jia, Peng1
  • Gao, Weichen1
  • Li, Youbing1
  • Bai, Zhuyu1
  • Liu, Xin1
  • Deng, Qunying1
  • Xu, Jing2
  • Yang, Chaolong3
  • 1 School of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054, PR China. , (China)
  • 2 College of Chemical Engineering and Materials, Quanzhou Normal University. Electronic address: [email protected]
  • 3 School of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054, PR China. Electronic address: [email protected] , (China)
Type
Published Article
Journal
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
Publication Date
Jun 15, 2019
Volume
217
Pages
86–92
Identifiers
DOI: 10.1016/j.saa.2019.03.078
PMID: 30927575
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Developing novel rare-earth complexes to rapidly and reliably sensing anions in pure water is highly challenging. Here, a series of long fluorescence lifetime polyurethane foam bonded Tb(BAA)3 chromophore porous material (Tb-PUFs) have been designed and synthesized via a simple one-step co-polycondensation reaction as an efficient fluorescent sensor for H2PO4- in pure water. All Tb-PUFs exhibited strong green emission and long fluorescence lifetime in water, which was ascribed to Tb-complex can be dispersed very well in polyurethane foam, effectively avoiding the emission quenching of Tb3+ ions caused by water molecules vibration. The titration experimental results showed that precursor Tb(BAA)3 can effective recognize F-, CH3COO-, and H2PO4- in DMSO solution. Interestingly, Tb-PUFs can only selectively recognize H2PO4- in pure water, this phenomenon can be explained that H2PO4- is acidic, and can occur deprotonation with -NH group of ligand BAA, thus making the fluorescence quenching effect was more sensitive for H2PO4- in pure water. In addition, the sensing ability of Tb-PUFs for H2PO4- is highly reversible by washing them with deionized water for three times. In a word, all results implied that Tb-PUFs was an excellent candidate for H2PO4- ions detection selectively in pure water. Copyright © 2019. Published by Elsevier B.V.

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