Study on the fluorescent covalent organic framework for selective “turn-off”recognition and detection of Fe3+ ions

Tian Zhang; Abdulwahab Salah; Shuhong Chang; Zhuo Zhang; Guang Wang

doi:10.1016/j.tet.2021.132405

Study on the fluorescent covalent organic framework for selective “turn-off”recognition and detection of Fe³⁺ ions

Tian Zhang, Abdulwahab Salah, Shuhong Chang, Zhuo Zhang, Guang Wang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

Covalent organic framework (TT-COF) based on 2,5-dihydroxyterephthalaldehyde and 1,3,5-tris(4-aminophenyl)benzene was prepared. TT-COF displays obvious fluorescence quenching response in ethanol towards Fe³⁺ with high selectivity accompanied by fluorescence red-shift. The fluorescence intensity of TT-COF at 425 nm shows a linear relationship with Fe³⁺ concentration with a low detection limit of 8.4 × 10⁻⁵ mol/L. The high fluorescence selectivity can be attributed to the synergetic effects of unique pore structure and the coordination of Fe³⁺ ions with N and O atoms of TT-COF. The coordination between TT-COF and Fe³⁺ ion was confirmed by reversible fluorescence change upon the addition of ethylenediaminetetraacetic acid disodium salt (EDTA), XPS spectra, and DFT calculation. The fluorescence quenching is attributed to the intramolecular charge transfer (ICT) and the absorption competition quenching (ACQ) mechanism. This work indicating the fluorescent COF as a fluorescence sensor has promising application in recognition and detection of specific metal ions.

Original language	English
Article number	132405
Journal	Tetrahedron
Volume	96
DOIs	https://doi.org/10.1016/j.tet.2021.132405
State	Published - 10 Sep 2021
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

Covalent organic framework
Fluorescence sensing
High selectivity
Intramolecular charge transfer
Iron ion

ASJC Scopus subject areas

Biochemistry
Drug Discovery
Organic Chemistry

Access to Document

10.1016/j.tet.2021.132405

Cite this

@article{d2e4fe56f1cb4afe9ddb3e68aac53aa3,

title = "Study on the fluorescent covalent organic framework for selective “turn-off”recognition and detection of Fe3+ ions",

abstract = "Covalent organic framework (TT-COF) based on 2,5-dihydroxyterephthalaldehyde and 1,3,5-tris(4-aminophenyl)benzene was prepared. TT-COF displays obvious fluorescence quenching response in ethanol towards Fe3+ with high selectivity accompanied by fluorescence red-shift. The fluorescence intensity of TT-COF at 425 nm shows a linear relationship with Fe3+ concentration with a low detection limit of 8.4 × 10−5 mol/L. The high fluorescence selectivity can be attributed to the synergetic effects of unique pore structure and the coordination of Fe3+ ions with N and O atoms of TT-COF. The coordination between TT-COF and Fe3+ ion was confirmed by reversible fluorescence change upon the addition of ethylenediaminetetraacetic acid disodium salt (EDTA), XPS spectra, and DFT calculation. The fluorescence quenching is attributed to the intramolecular charge transfer (ICT) and the absorption competition quenching (ACQ) mechanism. This work indicating the fluorescent COF as a fluorescence sensor has promising application in recognition and detection of specific metal ions.",

keywords = "Covalent organic framework, Fluorescence sensing, High selectivity, Intramolecular charge transfer, Iron ion",

author = "Tian Zhang and Abdulwahab Salah and Shuhong Chang and Zhuo Zhang and Guang Wang",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2021",

month = sep,

day = "10",

doi = "10.1016/j.tet.2021.132405",

language = "English",

volume = "96",

journal = "Tetrahedron",

issn = "0040-4020",

}

TY - JOUR

T1 - Study on the fluorescent covalent organic framework for selective “turn-off”recognition and detection of Fe3+ ions

AU - Zhang, Tian

AU - Salah, Abdulwahab

AU - Chang, Shuhong

AU - Zhang, Zhuo

AU - Wang, Guang

PY - 2021/9/10

Y1 - 2021/9/10

N2 - Covalent organic framework (TT-COF) based on 2,5-dihydroxyterephthalaldehyde and 1,3,5-tris(4-aminophenyl)benzene was prepared. TT-COF displays obvious fluorescence quenching response in ethanol towards Fe3+ with high selectivity accompanied by fluorescence red-shift. The fluorescence intensity of TT-COF at 425 nm shows a linear relationship with Fe3+ concentration with a low detection limit of 8.4 × 10−5 mol/L. The high fluorescence selectivity can be attributed to the synergetic effects of unique pore structure and the coordination of Fe3+ ions with N and O atoms of TT-COF. The coordination between TT-COF and Fe3+ ion was confirmed by reversible fluorescence change upon the addition of ethylenediaminetetraacetic acid disodium salt (EDTA), XPS spectra, and DFT calculation. The fluorescence quenching is attributed to the intramolecular charge transfer (ICT) and the absorption competition quenching (ACQ) mechanism. This work indicating the fluorescent COF as a fluorescence sensor has promising application in recognition and detection of specific metal ions.

AB - Covalent organic framework (TT-COF) based on 2,5-dihydroxyterephthalaldehyde and 1,3,5-tris(4-aminophenyl)benzene was prepared. TT-COF displays obvious fluorescence quenching response in ethanol towards Fe3+ with high selectivity accompanied by fluorescence red-shift. The fluorescence intensity of TT-COF at 425 nm shows a linear relationship with Fe3+ concentration with a low detection limit of 8.4 × 10−5 mol/L. The high fluorescence selectivity can be attributed to the synergetic effects of unique pore structure and the coordination of Fe3+ ions with N and O atoms of TT-COF. The coordination between TT-COF and Fe3+ ion was confirmed by reversible fluorescence change upon the addition of ethylenediaminetetraacetic acid disodium salt (EDTA), XPS spectra, and DFT calculation. The fluorescence quenching is attributed to the intramolecular charge transfer (ICT) and the absorption competition quenching (ACQ) mechanism. This work indicating the fluorescent COF as a fluorescence sensor has promising application in recognition and detection of specific metal ions.

KW - Covalent organic framework

KW - Fluorescence sensing

KW - High selectivity

KW - Intramolecular charge transfer

KW - Iron ion

UR - https://www.scopus.com/pages/publications/85113324550

U2 - 10.1016/j.tet.2021.132405

DO - 10.1016/j.tet.2021.132405

M3 - Article

AN - SCOPUS:85113324550

SN - 0040-4020

VL - 96

JO - Tetrahedron

JF - Tetrahedron

M1 - 132405

ER -