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Sensors 2018, 18(3), 681; https://doi.org/10.3390/s18030681

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

1
College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China
2
School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
3
The Atmospheric Environment Department, Chinese Academy for Environmental Planning, Beijing 100012, China
*
Authors to whom correspondence should be addressed.
Received: 28 December 2017 / Revised: 9 February 2018 / Accepted: 21 February 2018 / Published: 25 February 2018
(This article belongs to the Special Issue Fluorescent Probes and Sensors)
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Abstract

A novel fluorescence sensor of NR-β-CD@AuNPs was prepared for the trace detection of nitrite in quantities as low as 4.25 × 10−3 μg∙mL−1 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. View Full-Text
Keywords: gold nanoparticles; cyclodextrin; neutral red; nitrite ions; fluorescence sensor; trace detection gold nanoparticles; cyclodextrin; neutral red; nitrite ions; fluorescence sensor; trace detection
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Du, X.; Zhang, X.; Jiang, C.; Zhang, W.; Yang, L. The Trace Detection of Nitrite Ions Using Neutral Red Functionalized SH-β-Cyclodextrin @Au Nanoparticles. Sensors 2018, 18, 681.

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