Signal-on fluorescent sensor based on GQDs–MnO<sub>2</sub> composite for glutathione

Liu, Zongen; Cai, Xueting; Lin, Xiang; Zheng, Yufeng; Wu, Yangting; Chen, Pingping; Weng, Shaohuang; Lin, Lin

doi:10.1039/c5ay03108g

Cited by 28 publications

(8 citation statements)

References 36 publications

(38 reference statements)

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“…In addition, FTIR and UV-vis measurements were used for the further illuminating the characteristics of the prepared MnO 2 nanosheets. As shown in Figure 1 C, the FTIR spectrum showed a characteristic absorption peak at about 521 cm −1 ascribed to Mn-O vibration, suggesting the specific structure information of the MnO 2 nanosheets [ 31 , 38 ]. In the wavelength range from 300 nm to 500 nm, the UV-vis spectrum indicated a broad absorption band with a shoulder centered at 346 nm ( Figure 1 D), which was the d-d transition of Mn (IV) in the lattice structure of MnO 6 octahedra of MnO 2 nanosheets.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, MnO 2 nanosheets, a metal oxide nanomaterial with ultrathin layers, were recognized as planar structures like graphene [ 30 ]. Due to their two-dimensional, adsorption and convenient preparation characteristics, several applications based on the changes of the content of MnO 2 nanosheets, such as fluorescent and drug delivery platforms [ 31 ], were established. Besides them, sensing methods for ascorbic acid, hypochlorite and other substances based on the change of the absorbance of MnO 2 nanosheets, have proved that MnO 2 nanosheets can be a suitable candidate for the establishment of visual inspection methods [ 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

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A Simple and Effective Colorimetric Assay for Glucose Based on MnO2 Nanosheets

Huang

Zheng

Feng

et al. 2018

Sensors

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Simple and effective methods for the detection of the level of blood glucose are closely linked to the monitoring of people’s health. In the study, MnO2 nanosheets with absorption range of 300 nm~500 nm and obvious yellow color were easily prepared and applied to detect glucose through their absorbance and color. The proposed method is based on the fact that a specific concentration of glucose can be quantitatively transformed into hydrogen peroxide (H2O2) under the catalytic effect of glucose oxidase. Based on the redox reaction of MnO2 with H2O2, yellow MnO2 can be converted into colorless Mn2+ to monitor the concentration of glucose. Under optimal conditions, a simple and effective visual assay for the sensitive and reliable detection of glucose was developed. The linear range was estimated to the range from 0 μM to 100 μM, with a detection limit of 12.8 μM. Furthermore, the proposed colorimetric assay based on MnO2 nanosheets can effectively detect blood glucose of clinical serum samples with accuracy and convenience.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Simple and Effective Colorimetric Assay for Glucose Based on MnO2 Nanosheets

Huang

Zheng

Feng

et al. 2018

Sensors

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“…Sudden changes in GSH level could be a clue in the diagnosis of several diseases including neurodegenerative diseases, cancers, diabetes, cardiac failure, AIDS and liver wounds. To date, numerous methods have been developed to evaluate levels of GSH that include label‐free methods such as electrochemical, high‐performance liquid chromatography (HPLC) and surface‐enhanced Raman scattering (SERS) but also fluorescence‐ and colorimetric‐based methods . Here, we attempted to detect GSH from aqueous solutions in the presence of 10 mM of NaCl.…”

Section: Resultsmentioning

confidence: 99%

Fast and facile preparation of nanostructured silicon surfaces for laser desorption/ionization mass spectrometry of small compounds

Hamdi

Enjalbal

Drobecq

et al. 2018

Rapid Comm Mass Spectrometry

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“…GQDs as energy donors and MnO 2 NSs as acceptors in a FRET sensing platform were reported for the detection of various analytes like GSH, enzymes, and pesticides. − GQDs are generally synthesized from GO or citric acid by hydrothermal methods (Table ).…”

Section: Sensing Applicationsmentioning

confidence: 99%

Review of 2D MnO₂ Nanosheets as FRET-Based Nanodot Fluorescence Quenchers in Chemosensing Applications

Hiremath

Banerjee

Chatterjee

2022

ACS Appl. Nano Mater.

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In the past decade, a variety of MnO 2 nanostructures have been used in chemosensing applications because of their unique redox properties, structural diversity, and broad absorption band, which makes them good energy acceptors. The most common strategy in Forster (or fluorescence) resonance energy transfer (FRET)-based chemosensing assays is to use low-dimensional fluorescent dots like carbon-based dots, metal dots, and even fluorescent dyes to form donor−acceptor pairs with 2D MnO 2 nanosheets (NSs). This review is a collection of the current library on fluorescent nanodots and MnO 2 NSs-based FRET conjugates as sensing platforms with a focus on highlighting the strategies involved in the detection of various analytes. Commonly, an analyte-triggered redox reaction results in the decomposition of MnO 2 NSs, leading to the release of fluorescent nanodots in solution for the turn-on detection of various reducing species. We intend to elaborately discuss the systematic upgradation of detection strategies involving fluorescent dots@2D MnO 2 NSs. Recently, a cascade of redox reactions was judiciously employed to target several bioanalytes involving a fluorescent dots@MnO 2 NSs FRET conjugate in a selective and sensitive manner. These sensing assays are categorized by the use of different fluorescent nanodots [carbon dots (CDs) and graphene quantum dots (GQDs), polymer dots, metal dots, etc.] with 2D MnO 2 NSs as FRET pairs in different sensing applications. Further, the analytes were categorized as reducing species, oxidants, enzymes, microbes, etc. The focus was paid to the sensing efficiency of the analytical tool. As a part of the study, a brief account of the synthesis of nanodots and MnO 2 NSs, their properties, and the FRET mechanism is also included. In a few cases, the sensing mechanism follows an inner filter effect without a prerequisite of the distance between the fluorophore and quencher units in the sensing of analytes, which are also covered in this collection. The available literature indicates a bright future for these FRET-based contemporary sensing strategies as environmentally benign, cost-effective, label-free techniques, which are discussed in the end.

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Signal-on fluorescent sensor based on GQDs–MnO₂ composite for glutathione

Abstract: Facile, one-step strategy for selective GSH sensing in serum and in drug quality control using GQDs–MnO2 composite.

Cited by 28 publications

References 36 publications

A Simple and Effective Colorimetric Assay for Glucose Based on MnO2 Nanosheets

A Simple and Effective Colorimetric Assay for Glucose Based on MnO2 Nanosheets

Fast and facile preparation of nanostructured silicon surfaces for laser desorption/ionization mass spectrometry of small compounds

Review of 2D MnO₂ Nanosheets as FRET-Based Nanodot Fluorescence Quenchers in Chemosensing Applications

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Signal-on fluorescent sensor based on GQDs–MnO2 composite for glutathione

Abstract: Facile, one-step strategy for selective GSH sensing in serum and in drug quality control using GQDs–MnO2 composite.

Cited by 28 publications

References 36 publications

A Simple and Effective Colorimetric Assay for Glucose Based on MnO2 Nanosheets

A Simple and Effective Colorimetric Assay for Glucose Based on MnO2 Nanosheets

Fast and facile preparation of nanostructured silicon surfaces for laser desorption/ionization mass spectrometry of small compounds

Review of 2D MnO2 Nanosheets as FRET-Based Nanodot Fluorescence Quenchers in Chemosensing Applications

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Product

Resources

About

Signal-on fluorescent sensor based on GQDs–MnO₂ composite for glutathione

Review of 2D MnO₂ Nanosheets as FRET-Based Nanodot Fluorescence Quenchers in Chemosensing Applications