Fast synthesis of porous copper nanoclusters for fluorescence detection of iron ions in water samples

Huang, Yihong; Zhang, Hanqiang; Xu, Xiaojuan; Zhou, Jiangcong; Lü, Fenfen; Zhang, Zhusen; Zhang, Hu; Luo, Jiangshui

doi:10.1016/j.saa.2018.05.030

Cited by 30 publications

(8 citation statements)

References 21 publications

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“…In addition to clinical blood tests and attempts to prepare nanomaterial-based sensors, CuNCs have also been extensively applied for ferric ion sensing in water, urine and serum samples based on fluorescence quenching of a sensor signal. 30,135,138,145,148,[245][246][247][248][249] For example, dopamine-protected CuNCs-based biosensor could properly operate in the range of 5-300 μM with LOD 1.2 μM. 148 However, the extensive research in the field resulted in even lower LOD values down to 10 nM when tannic acid (TA)-protected CuNCs were implemented as a sensor.…”

Section: Metal Cation Detectionmentioning

confidence: 99%

Copper nanoclusters: designed synthesis, structural diversity, and multiplatform applications

2021

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Section: Metal Cation Detectionmentioning

confidence: 99%

Copper nanoclusters: designed synthesis, structural diversity, and multiplatform applications

2021

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“…To further investigate the oxidation state of Cu, the detailed peaks were showed in Figure E. It can be seen from the image, two binding energy peaks around 932.45 and 952.05 eV were corresponded with the Cu 2p 3/2 and Cu 2p 1/2 electrons of Cu 0 or Cu + . Furthermore, the binding energy of Cu 2+ at 942 eV was not observed, demonstrating that Cu 2+ was absolutely reduced.…”

Section: Resultsmentioning

confidence: 99%

“…As we can see from Figure B, K SV and K q are equal to 2.5×10 4 L•mol −1 and 5.97×10 12 L•mol −1 •s −1 , respectively. The K q value was greater than the maximum scatter collision quenching constant (2×10 10 L•mol −1 •s −1 ), implying that the quenching mechanism was static quenching . Therefore, the quenching mechanism of His‐Cu NCs in the presence of tetracycline was static quenching.…”

Section: Resultsmentioning

confidence: 99%

“…To date, many protective agents including DNAs, amino acid, BSA, GSH and polymers have been applied for the preparation of Cu NCs. At the same time, the Cu NCs have been employed to detect metal ions, non‐metal ions, dopamine, picric acid, and histamine . To the best of our knowledge, there are only few articles about determination of tetracycline by using Cu NCs.…”

Section: Introductionmentioning

confidence: 99%

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An Efficient Fluorescent Probe for Tetracycline Detection Based on Histidine‐Templated Copper Nanoclusters

et al. 2020

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In this contribution, we established a simple, green, fast and cost‐effective strategy to prepare green‐emitting fluorescence copper nanoclusters (Cu NCs) by using histidine as a stabilizer and ascorbic acid as a reducing agent. A series of characterization methods including fluorescence spectroscopy, UV‐vis absorption spectroscopy, fourier transform infrared spectroscopy (FT‐IR), transmission electron microscopy (TEM) and X‐ray photoelectron spectroscopy (XPS) were used to characterize the Cu NCs. The histidine‐capped Cu NCs (His‐Cu NCs) was well dispersed and exhibited good water solubility, excellent photostability and salt resistance. Interestingly, it was discovered that tetracycline caused a sensitive and selective decline in the fluorescence intensity of His‐Cu NCs for the first time. The proposed analysis system showed a wide linear range from 0.1 to 110 μM, and the detection limit was 0.047 μM. After that, the fluorescent assay was successfully employed to analyze tetracycline in lake water samples.

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“…The almost negligible gap between two fluorescence lifetimes also stated the possibility of static quenching rather than fluorescence resonance energy transfer (FRET) and dynamic quenching mechanism. [49][50][51] Inner filter effect (IFE) also always appeared in quenching phenomena. When there was overlap between quencher's absorption spectra and probe's excitation and/or emission spectra, IFE was more likely to happen.…”

Section: Investigation Of Quenching Mechanismmentioning

confidence: 99%

Blue Luminescent Glutathione‐protected Copper Nanoclusters for Selective Detection of Barbaloin

et al. 2022

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Based on the importance of barbaloin (Bar), development of efficient sensing methods in barbaloin detection has remarkable function and practical significance. In this work, copper nanoclusters (Cu NCs) with good water‐soluble character were prepared by one‐pot way and successfully used for selective detection of barbaloin. The stable probe with uniform size was protected by glutathione (GSH) and reduced by ascorbic acid (AA). Intriguingly, fluorescence of GSH−Cu NCs was quenched by barbaloin. The static quenching and inner filter effect (IFE) was supposed to main quenching mechanism. Furthermore, GSH−Cu NCs could well distinguish barbaloin from possible interferes and exhibited linear relationship of barbaloin concentrations from 3 to 100 μM. Significantly, satisfactory recovery experiments were successfully operated in bovine serum samples for barbaloin sensing. This probe with superior fluorescence properties provided better choice for barbaloin detection.

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Fast synthesis of porous copper nanoclusters for fluorescence detection of iron ions in water samples

Cited by 30 publications

References 21 publications

Copper nanoclusters: designed synthesis, structural diversity, and multiplatform applications

Copper nanoclusters: designed synthesis, structural diversity, and multiplatform applications

An Efficient Fluorescent Probe for Tetracycline Detection Based on Histidine‐Templated Copper Nanoclusters

Blue Luminescent Glutathione‐protected Copper Nanoclusters for Selective Detection of Barbaloin

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