Highly selective and sensitive detection of trinitrotoluene by framework-enhanced fluorescence of gold nanoclusters

Precise analysis of explosives is important for environmental pollution evaluation and terrorist prevention. However, rapid assay of explosives with high selectivity and sensitivity remains difficult. Here, we show that the gold nanocluster-modified metal-organic frameworks are excellent optical pro...

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Bibliographic Details
Published in:Analytica chimica acta 2020-04, Vol.1106, p.133-138
Main Authors: Zhao, Yun, Pan, Min, Liu, Feng, Liu, Yahua, Dong, Ping, Feng, Jie, Shi, Tianhui, Liu, Xiaoqing
Format: Article
Language:English
Subjects:
Aggregation-induced emission
Amplified sensing
Explosive detection
Fluorescence detection
Fluorescent nanoprobes
Gold nanoclusters
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Summary:Precise analysis of explosives is important for environmental pollution evaluation and terrorist prevention. However, rapid assay of explosives with high selectivity and sensitivity remains difficult. Here, we show that the gold nanocluster-modified metal-organic frameworks are excellent optical probes for explosive detection. The nanoclusters exhibit enhanced luminescence and selectively respond toward 2,4,6-trinitrotoluene over other explosives with a detection limit of 5 nM and fast response within 1 min. The efficient assay is resulted from the framework-mediated cluster aggregation and TNT binding. Gold nanocluster-modified metal-organic frameworks exhibit enhanced luminescence and serve as sensitive optical probes for selective and rapid detection of TNT. [Display omitted] •Facilely functionalized gold nanoclusters with enhanced luminescence were successfully synthesized.•Gold nanoclusters incorporated ZIF-8 showed rapid response to TNT within 1 min.•The fluorescent probe exhibited highly sensitive and selective sensing toward TNT over other explosives.
ISSN:0003-2670
1873-4324
DOI:10.1016/j.aca.2020.01.055