The Trace Detection of Nitrite Ions Using Neutral Red Functionalized SH-β-Cyclodextrin @Au Nanoparticles

A novel fluorescence sensor of NR-β-CD@AuNPs was prepared for the trace detection of nitrite in quantities as low as 4.25 × 10 μg∙mL in an aqueous medium. The fluorescence was due to the host-guest inclusion complexes between neutral red (NR) molecules and gold nanoparticles (AuNPs), which were modi...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2018-02, Vol.18 (3), p.681
Main Authors: Du, Xiaoyang, Zhang, Xiaoxia, Jiang, Chunlai, Zhang, Weilu, Yang, Lizhu
Format: Article
Language:English
Subjects:
cyclodextrin
Cyclodextrins
Fluorescence
fluorescence sensor
Gold
gold nanoparticles
Inclusion complexes
Microwaves
Nanoparticles
neutral red
nitrite ions
Reducing agents
Supramolecular compounds
trace detection
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Summary:A novel fluorescence sensor of NR-β-CD@AuNPs was prepared for the trace detection of nitrite in quantities as low as 4.25 × 10 μg∙mL in an aqueous medium. The fluorescence was due to the host-guest inclusion complexes between neutral red (NR) molecules and gold nanoparticles (AuNPs), which were modified by per-6-mercapto-beta-cyclodextrins (SH-β-CDs) as both a reducing agent and a stabilizer under microwave radiation. The color of the NR-β-CD@AuNPs changed in the presence of nitrite ions. A sensor was applied to the determination of trace nitrites in environmental water samples with satisfactory results.
ISSN:1424-8220
1424-8220
DOI:10.3390/s18030681