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Simple fluorescence sensing of extreme acidity based on inner filter effect of ascorbic acid to fluorescent Au nanoclusters

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Abstract

As acidic pH plays essential roles in several organelles, development of pH sensors for extreme acidity is of vital importance. Herein, on the basis of the inner filter effect (IFE) between ascorbic acid (AA) and Au nano-clusters (AuNCs), a simple extreme acidity fluorescence sensor was developed without complex organic synthesis. The as-prepared probe can be used to detect acidity within the pH range of 2.4–4.6. Moreover, the probe possesses high selectivity, good photostability, and excellent reversibility for monitoring extreme acidity in bacterial cells without the influence of autofluorescence.

Graphical abstract: Simple fluorescence sensing of extreme acidity based on inner filter effect of ascorbic acid to fluorescent Au nanoclusters

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Publication details

The article was received on 18 May 2017, accepted on 05 Jun 2017 and first published on 07 Jun 2017


Article type: Communication
DOI: 10.1039/C7NR03566G
Citation: Nanoscale, 2017, Advance Article
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    Simple fluorescence sensing of extreme acidity based on inner filter effect of ascorbic acid to fluorescent Au nanoclusters

    R. Zhou, Y. Li, Y. Tian, Q. Sun, P. Deng, L. Wu and X. Hou, Nanoscale, 2017, Advance Article , DOI: 10.1039/C7NR03566G

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