Carbon dots as an “on-off-on” fluorescent probe for detection of Cu(II) ion, ascorbic acid, and acid phosphatase

Ma, Xin; Lin, Shuo; Dang, Yunfei; Dai, Yu; Zhang, Xiaojin; Xia, Fan

doi:10.1007/s00216-019-02038-z

Cited by 62 publications

(11 citation statements)

References 35 publications

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“…Therefore, ascorbic acid plays a vital role in determining the freshness quality of the fruit. Studies performed by Ma et al [26] and Zam [27] illustrated the functional characteristics of the ascorbic acid in terms of the oxygen permeability and enzymatic secretions which are some of the important parameters governing a fruit's quality. Therefore, this chemical test was crucial for determining the performance of the extracted edible coating on the bananas.…”

Section: Resultsmentioning

confidence: 99%

Effect of a chitosan edible‐coating enriched with Citrus limon peel extracts and Ocimum tenuiflorum leaf extracts on the shelf‐life of bananas

Majumder

Ganguly

2020

Biosurface and Biotribology

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Section: Resultsmentioning

confidence: 99%

Effect of a chitosan edible‐coating enriched with Citrus limon peel extracts and Ocimum tenuiflorum leaf extracts on the shelf‐life of bananas

Majumder

Ganguly

2020

Biosurface and Biotribology

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“…7) revealed that cations (Na + , K + , Ca 2+ ), carbohydrates (Glu, Fru, Suc), amino acids (Lys, Trp, Tyr), Chol and BSA had ignorable reducibility of Fe 3+ to Fe 2+ , which made most fluorescence of NCD-m to be quenched by Fe 3+ . Additionally, the chemical structures of AA, Cys, TA, CA and GSH contained reducing groups such as carboxyl and thiol [47], which results in the striking conversion of Fe 3+ to Fe 2+ . Due to the different reducibility of these reductants, fluorescence of NCD-m was preserved to varying degrees.…”

Section: Fluorescence Detection Of Aamentioning

confidence: 99%

“…And Ag + causes fluorescence quenching of NCDs and N-other atom co-doped CDs [21][22][23][24]. Moreover, fluorescence of some NCDs is able to be effectively retained when Fe 3+ is reduced to Fe 2+ by reductants such as ascorbic acid (AA) [25,26]. Therefore, NCDs as fluorescence sensors of metal ions and other analytes have been widely developed.…”

Section: Introductionmentioning

confidence: 99%

Simple and Sensitive Multi-components Detection Using Synthetic Nitrogen-doped Carbon Dots Based on Soluble Starch

Qiao

et al. 2021

J Fluoresc

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Although carbon dots (CDs) as fluorescent sensors have been widely exploited, multi-component detection using CDs without tedious surface modification is always a challenging task. Here, two kinds of nitrogen-doped CDs (NCD-m and NCD-o) based on soluble starch (SS) as carbon source were prepared through one-pot hydrothermal process using m-phenylenediamine and o-phenylenediamine as nitrogenous dopant respectively. Through fluorescence "on-off" mechanism of CDs, NCD-m and NCD-o could be used as a fluorescence sensor for detection of Fe 3+ and Ag + with LOD of 0.25 and 0.5 μM, respectively. Additionally, NCD-m could be used for indirect detection of ascorbic acid (AA) with LOD of 5 μM. Moreover, fluorescence intensity of NCD-m also exhibited the sensitivity to pH change from 2 to 13. More importantly, Both NCD-m and NCD-o had potential application for analysis of complicated real samples such as tap water, Vitamin C tablets and orange juice.Ultimately, the small size of NCD-m could contribute to reinforcing intracellular endocytosis, which allowed them to be used for bacteria imaging.

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“…In recent decades, a variety of strategies using colorimetry [2,[7][8][9][10][11][12][13][14], fluorescence [15][16][17][18][19], surface-enhanced Raman scattering [20], and electrochemistry [21,22] have been established for detecting ACP. Compared with other traditional detection methods, colorimetric assays have advantages such as fast response, simple operation, real-time visualization, and low cost.…”

Section: Introductionmentioning

confidence: 99%

Smartphone colorimetric assay of acid phosphatase based on a controlled iodine-mediated etching of gold nanorods

Liu

Huang

2020

Anal Bioanal Chem

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A simple but efficient colorimetric assay was developed for the detection and quantification of acid phosphatase (ACP) using a smartphone. This strategy is based on target-controlled iodine-mediated etching of gold nanorods (AuNRs). Due to effective hydrolysis of the substrate pyrophosphate (PPi) by ACP, chelated Cu 2+ with PPi was released, which promoted the redox reaction with an iodide ion (I −), leading to the formation of I 3 −. As the etching agent of AuNRs, I 3 − caused a blueshift of the localized surface plasmon resonance peak and, more importantly, an observable color change. The vivid colors were recorded with a smartphone camera and directly analyzed using an image-processing app. On the basis of the direct correlation between ACP concentration and the etching degree of AuNRs as well as color change, this smartphone nanocolorimetry technique showed a good linear response toward ACP over the range of 0-15.0 U/L, with a detection limit of 0.97 U/L. Using the standard addition method, the practical applicability of the proposed smartphone-based assay was successfully demonstrated by determining ACP in human serum samples, with results consistent with those obtained by UV-Vis spectrophotometry.

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Carbon dots as an “on-off-on” fluorescent probe for detection of Cu(II) ion, ascorbic acid, and acid phosphatase

Cited by 62 publications

References 35 publications

Effect of a chitosan edible‐coating enriched with Citrus limon peel extracts and Ocimum tenuiflorum leaf extracts on the shelf‐life of bananas

Effect of a chitosan edible‐coating enriched with Citrus limon peel extracts and Ocimum tenuiflorum leaf extracts on the shelf‐life of bananas

Simple and Sensitive Multi-components Detection Using Synthetic Nitrogen-doped Carbon Dots Based on Soluble Starch

Smartphone colorimetric assay of acid phosphatase based on a controlled iodine-mediated etching of gold nanorods

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