Multi-channel detection of Au(III) ions by a novel rhodamine based probe

Ionic gold species display remarkable features in chemical and biological activities. However, high amount of gold ions, especially Au3+ ions (200 µM), seriously threaten living organisms and vital human organs. Therefore, accurate detection of Au3+ ions is highly desirable. In this work, a novel rh...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2022-06, Vol.360, p.131658, Article 131658
Main Authors: Suna, Garen, Erdemir, Eda, Liv, Lokman, Gunduz, Simay, Ozturk, Turan, Karakuş, Erman
Format: Article
Language:English
Subjects:
Aluminum
Calcium ions
Cerium
Cobalt
Colorimetry
Electrochemical sensor
Fluorescent sensor
Gold
Gold (III) ion detection
Manganese
Multi-channel probe
Organs
Rhodamine
Ring opening
Silver
Water sampling
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Summary:Ionic gold species display remarkable features in chemical and biological activities. However, high amount of gold ions, especially Au3+ ions (200 µM), seriously threaten living organisms and vital human organs. Therefore, accurate detection of Au3+ ions is highly desirable. In this work, a novel rhodamine based optical and electrochemical active probe, integrated with triphenylamine and thiophene moiety, exhibited highly selective detection of Au(III) ions compared to the other metal species, such as Ag+, K+, Li+, Na+, Hg2+, Ba2+, Ca2+, Cd2+, Cu2+, Co2+, Mg2+, Mn2+, Ni2+, Pb2+, Zn2+ Pd2+, Al3+, Ce3+, Cr3+, Fe3+ and Cr6+. Exploiting hydrolysis and ring-opening reaction, the probe offers privileged properties such as naked-eye detection (colorimetric), both “turn-on” and “turn-off” fluorescence responses, voltammetric read-out with an anodic shift, low detection limit (340 and 315 nM for “turn-on” and “turn-off”, respectively), rapid response, and applicability in determining Au(III) in complex water samples. [Display omitted] •Novel rhodamine based multi-channel probe for selective detection of Au3+ ions.•Both “turn-on” and “turn-off” fluorescence responses.•Naked-eye detection (colorimetric).•The first example of electrochemical sensing of Au3+ ions.•Successful detection of Au3+ ions in various water samples.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2022.131658