An unexpected dual-response pH probe based on acridine

Xu, Ling; Yan, Xiang-Zhen; Yuan, Chunxue

doi:10.1039/c8ra07283c

Cited by 7 publications

(1 citation statement)

References 41 publications

(47 reference statements)

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“…Moreover, eosin is widely employed in electrochemistry to create electrodes sensitive to Cd [54]. The acridine dyes and their derivatives are widely used as fluorescent and electrochemical sensors [55][56][57], as solar photocatalysts for enhancing biodegradability of toxic compounds [58], and for develop-ment of new fluorescent pH sensors [59]. Methylene blue is widely used in medicine [60] and as a near-infrared fluorescent probe [61,62]; its polarization is used as a quantitative marker of cancer at the cellular level [63].…”

Section: Methodsmentioning

confidence: 99%

Toward a Selective Analysis of Heavy Metal Salts in Aqueous Media with a Fluorescent Probe Array

Melnikov

Bykov

Varezhnikov

et al. 2022

Sensors

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Detection of heavy meals in aqueous media challenges worldwide research in developing particularly fast and affordable methods. Fluorescent sensors look to be an appropriate instrument for such a task, as recently they have been found to have made large progress in the detection of chemical analytes, primarily in the environment, along with biological fluids, which still suffer from not enough selectivity. In this work, we propose a new fluorescent method to selectively recognize heavy metals in an aqueous solution via employing an array of several fluorescent probes: acridine yellow, eosin, and methylene blue, which were taken as examples, being sensitive to a microsurrounding of the probe molecules. The exemplary sensor array generated six channels of spectral information through the use of various combinations of excitation and detection wavelengths. Following the known multisensor approach, we applied a linear discriminant analysis to selectively distinguish the vector signals from the sensor array from salts of heavy metals—Cu, Pb, Zn, Cd, and Cz—at the concentration ranges of 2.41 × 10−6–1.07 × 10−5 M, 2.8 × 10−5–5.87 × 10−4 M, 1.46 × 10−6–6.46 × 10−6 M, 1.17 × 10−8–5.2 × 10−8 M, and 2.11 × 10−6–9.33 × 10−6 M, respectively. The suggested approach was found to be promising due to it employing only one cuvette containing the test solution, simplifying a sample preparation when compared to preparing a variety of solutions in tests with single fluorescence probes.

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