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A fluorescent sp 2 c-covalent organic polymer with an aggregation-induced emission unit to suppress aggregation-induced quenching for sensing furazolidone
Furazolidone (FZD) is a nitrofuran antibiotic that has an inhibitory effect on a variety of Gram-negative and positive bacteria. However, excessive use of FZD can produce major adverse responses and irreversible harm to the central nervous system, so it is necessary to develop a simple, rapid, highly selective and sensitive method for the detection of FZD. Here, a sp
2
c-covalent organic polymer (COP
PDAN-BTT
) containing benzotrithiophene was synthesized for fluorescence sensing FZD. The benzotrithiophene in the BTT monomer is a typical aggregation-induced quenching (ACQ) fluorophore, and the cyanide diphenylethylene unit has certain aggregation-induced emission (AIE) properties. The connection of the ACQ fluorophore and the AIE fluorophore can fully improve the ACQ degree of COP
PDAN-BTT
. Under excitation at 370 nm, COP
PDAN-BTT
exhibits green fluorescence at 500 nm. Based on the internal filtering effect, COP
PDAN-BTT
was used for FZD detection. The
I
0
/
I
showed a good linear relationship with the concentration of FZD in the range of 0.034–20 μg mL
−1
(0.149–88.9 μM), and the detection limit was as low as 0.011 μg mL
−1
(0.049 μM). Based on the AIE properties of COP
PDAN-BTT
, a fluorescent test strip was prepared for visual detection of FZD. This work provides a simple yet effective method for detection of FZD and improving the fluorescence of COPs.
Sprache
Englisch
Identifikatoren
ISSN: 2635-0998
eISSN: 2635-0998
DOI: 10.1039/D3SD00307H
Titel-ID: cdi_crossref_primary_10_1039_D3SD00307H
Format
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