Issue 12, 2020

A rhodamine-based dual chemosensor for the naked-eye detection of Hg2+ and enhancement of the fluorescence emission for Fe3+

Abstract

A novel fluorescent chemosensor based on trimesoyl chloride–rhodamine (TR) was successfully synthesized. Rising chromogenic and fluorogenic spectral enhancements could be observed in trimesoyl chloride–rhodamine (TR) probes when Hg2+ and Fe3+ were added, respectively. TR has shown selectivity for Hg2+ and Fe3+ with high sensitivity due to metal ion complexation induced photophysical “turn-on” signaling responses. The detection limit towards Hg2+ was 2.46 × 10−8 M as determined by the 3σ method. At the same time, fluorogenic spectral enhancements were observed in TR, which exhibits a superior sensitive and selective recognition towards Fe3+ with 4.11 × 10−8 M of the detection limit. The test strips were used for colorimetric and simple detection towards Hg2+, which might finally enable the advancement of the Hg2+ sensor in the field of on-site detection.

Graphical abstract: A rhodamine-based dual chemosensor for the naked-eye detection of Hg2+ and enhancement of the fluorescence emission for Fe3+

Supplementary files

Article information

Article type
Paper
Submitted
11 Sep 2020
Accepted
10 Nov 2020
First published
11 Nov 2020

Photochem. Photobiol. Sci., 2020,19, 1690-1696

A rhodamine-based dual chemosensor for the naked-eye detection of Hg2+ and enhancement of the fluorescence emission for Fe3+

J. Hu, H. Yang, Q. Lin, H. Yao, Y. Zhang, T. Wei and W. Qu, Photochem. Photobiol. Sci., 2020, 19, 1690 DOI: 10.1039/D0PP00302F

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