Carbon dots based dual-emission silica nanoparticles as ratiometric fluorescent probe for nitrite determination in food samples

Xiang, Guoqiang; Wang, Yule; Zhang, Heng; Fan, Huanhuan; Fan, Li; He, Lijun; Jiang, Xiuming; Zhao, Wenjie

doi:10.1016/j.foodchem.2018.03.150

Cited by 70 publications

(23 citation statements)

References 34 publications

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“…In comparison, the fluorescence spectrometric and colorimetric methods have emerged as more convenient techniques for nitrite detection. In the recent past, different nanomaterials, including carbon dots, [76][77][78][79] dye-doped silica nanoparticles, 60 polyethyleneiminecapped CdS quantum dots, 75 4-aminothiophenol modified gold nanorods, 80 graphite-like carbon nitride nanomaterial, 81 ophenylenediamine-BODIPY probe, 82 inorganic complexes like iron and manganese pyridoxal-based complexes, 83 polymeric matrices, [84][85] metal-organic frameworks, 86 functionalized gold and silver nanoparticles etc. [87][88][89][90][91] were developed for colorimetric and fluorescence-based detection of NO2ions.…”

Section: Synthesis Of Chemically Reactive and Fluorescent Gel (Crfg)mentioning

confidence: 99%

“…[53][54][55][56][57][58] The World Health Organization (WHO) has set the maximum limit for NO 2 À in drinking water as 65 mM. 53,59,60 Thus, it is of utmost importance to develop a portable sensor for the facile and unambiguous detection of the nitrite level in drinking water even in remote places, where the availibility of sophisticated instrumentation is limited. To date, various solution-phase analytical methods, including electrochemical techniques, [61][62][63] spectrophotometry, 64,65 chemiluminescence, 66,67 uorescence spectrometry, [68][69][70][71] capillary electrophoresis, 72,73 ion chromatography, 74 and surface-enhanced Raman scattering 75 have been introduced for the detection of NO 2 À in aqueous environments.…”

Section: Design Of a Parallel And Portable 'On'/'off' Sensormentioning

confidence: 99%

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The synthesis of a chemically reactive and polymeric luminescent gel

Baruah

Manna

2021

Chem. Sci.

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Section: Synthesis Of Chemically Reactive and Fluorescent Gel (Crfg)mentioning

confidence: 99%

Section: Design Of a Parallel And Portable 'On'/'off' Sensormentioning

confidence: 99%

The synthesis of a chemically reactive and polymeric luminescent gel

Baruah

Manna

2021

Chem. Sci.

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“…It is often employed as a preservative or coloring agent in food processing [1]. However, excessive nitrite in food and drinking water poses a great threat to human health [2]. It can react with amines of amino acids to form nitrosamines, which have a recognized carcinogenic effect.…”

Section: Introductionmentioning

confidence: 99%

Ratiometric Colorimetric Detection of Nitrite Realized by Stringing Nanozyme Catalysis and Diazotization Together

et al. 2021

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Due to the great threat posed by excessive nitrite in food and drinking water to human health, it calls for developing reliable, convenient, and low-cost methods for nitrite detection. Herein, we string nanozyme catalysis and diazotization together and develop a ratiometric colorimetric approach for sensing nitrite in food. First, hollow MnFeO (a mixture of Mn and Fe oxides with different oxidation states) derived from a Mn-Fe Prussian blue analogue is explored as an oxidase mimic with high efficiency in catalyzing the colorless 3,3′,5,5′-tetramethylbenzidine (TMB) oxidation to blue TMBox, presenting a notable signal at 652 nm. Then, nitrite is able to trigger the diazotization of the product TMBox, not only decreasing the signal at 652 nm but also producing a new signal at 445 nm. Thus, the analyte-induced reverse changes of the two signals enable us to establish a ratiometric colorimetric assay for nitrite analysis. According to the above strategy, facile determination of nitrite in the range of 3.3–133.3 μM with good specificity was realized, providing a detection limit down to 0.2 μM. Compared with conventional single-signal analysis, our dual-signal ratiometric colorimetric mode was demonstrated to offer higher sensitivity, a lower detection limit, and better anti-interference ability against external detection environments. Practical applications of the approach in examining nitrite in food matrices were also verified.

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“…This dual emission behaviour could increase the efficacy of the carbon dot system in their applications. For example, a dual emission carbon dot can serve as a more sensitive and selective system compared with that containing only a single emission, while using these as fluorescent‐based sensors . To date, there have been only a few reports available on dual emission carbon dots.…”

Section: Introductionmentioning

confidence: 99%

“…reported a nitrite ion sensor based on a dual emission nanohybrid system. Carbon dots obtained from citric acid and rhodamine B (RhB) were grafted onto silica nanoparticles to prepare such a dual emission nanohybrid system . Fu et al .…”

Section: Introductionmentioning

confidence: 99%

Dual emission carbon dots from carotenoids: Converting a single emission to dual emission

et al. 2019

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Dual emission carbon dots have a high potential for use as fluorescence-based sensors with higher selectivity and sensitivity. This study demonstrated the possibility of conversion of a biological molecular system with a single emission peak to a double emission carbon dots system. This report is the first to describe the synthesis of dual emission carbon dots by tuning the electronic environment of a conjugated system.Here we prepared carbon dots from a natural extract, from which carotenoids were used as a new source for carbon dots. Formation of the carbon dots was confirmed by images obtained under a transmission electron microscope as well as from a dynamic light scattering study. The prepared carbon dots system was characterized and its optical property was monitored. The study showed that, after irradiation with microwaves, the fluorescence intensity of the whole system changed, without any change in the original peak position of the carotenoid but with the appearance of an additional peak. A Fourier transform infrared study confirmed breaking of the conjugated system. When using ethylene glycol as a surface passivating agent added to these carotenoid carbon dots, the dual emission spectra became more distinct.

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Carbon dots based dual-emission silica nanoparticles as ratiometric fluorescent probe for nitrite determination in food samples

Cited by 70 publications

References 34 publications

The synthesis of a chemically reactive and polymeric luminescent gel

The synthesis of a chemically reactive and polymeric luminescent gel

Ratiometric Colorimetric Detection of Nitrite Realized by Stringing Nanozyme Catalysis and Diazotization Together

Dual emission carbon dots from carotenoids: Converting a single emission to dual emission

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