One-pot synthesis of green-emitting gold nanoclusters as a fluorescent probe for determination of 4-nitrophenol

A hydrothermal method was applied to the synthesis of green-emitting gold nanoclusters (Au NCs) which are shown to be viable fluorescent probes for 4-nitrophenol (4-NP). The Au NCs were prepared by using thiol-β-cyclodextrin as a template. Under 365 nm excitation, their green fluorescence has a peak...

Full description

Saved in:
Bibliographic Details
Published in:Mikrochimica acta (1966) 2020-02, Vol.187 (2), p.106-106, Article 106
Main Authors: Li, Yu, Wen, Qiu-Lin, Liu, An-Yong, Long, Yunfei, Liu, Peng, Ling, Jian, Ding, Zhong-Tao, Cao, Qiu-E
Format: Article
Language:English
Subjects:
Analytical Chemistry
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Colorimetry
Cyclodextrins
Fluorescence
Fluorescent indicators
Gold
Investigations
Microengineering
Nanochemistry
Nanoclusters
Nanotechnology
Nitrophenol
Original Paper
Synthesis
Thiols
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A hydrothermal method was applied to the synthesis of green-emitting gold nanoclusters (Au NCs) which are shown to be viable fluorescent probes for 4-nitrophenol (4-NP). The Au NCs were prepared by using thiol-β-cyclodextrin as a template. Under 365 nm excitation, their green fluorescence has a peak at 502 nm, with a narrow emission bandwidth of only 30 nm. The fluorescence and composition of the Au NCs were characterized and the mechanism of the nanocluster formation is discussed. Due to host-guest recognition of β-cyclodextrin and 4-NP, fluorescence is quenched. The probe can selectively recognize 4-NP among other nitrophenols. A fluorometric and colorimetric assay was developed for 4-NP that works in the 0.1 to 100 μM concentration range and has a detection limit of 90 nM (at 3σ). Graphical abstract Schematic representation of hydrothermal synthesis of green-emitting gold nanoclusters using thiol-β-cyclodextrin. Fluorescence is quenched and the absorption of the nanoclusters is increases in the presence of 4-nitrophenol.
ISSN:0026-3672
1436-5073
DOI:10.1007/s00604-019-4090-5