One pot fabrication of fluorescein functionalized manganese dioxide for fluorescence “Turn OFF–ON” sensing of hydrogen peroxide in water and cosmetic samples

Ali, Hassan Refat H.; Hassan, Ahmed I.; Hassan, Yasser F.; El-Wekil, Mohamed M.

doi:10.1039/d0ra01980a

Cited by 21 publications

(19 citation statements)

References 52 publications

(42 reference statements)

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“…To measure fluorescence anisotropy and fluorescence intensity, fluorescein was used as a thermal probe in the present work. Fluorescein was selected due to the fact that it is a very mature fluorescent dye and researchers have been using fluorescein, along with its derivatives, for years [23][24][25][26][27][28][29]. In addition, it is important to note that fluorescein does not diffuse into polydimethylsiloxane (PDMS); the most common material used for the fabrication of a microchannel.…”

Section: Methodsmentioning

confidence: 99%

Fluorescence Anisotropy as a Temperature-Sensing Molecular Probe Using Fluorescein

2021

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Fluorescence anisotropy, a technique to study the folding state of proteins or affinity of ligands, is used in this present work as a temperature sensor, to measure the microfluidic temperature field, by adding fluorophore in the liquid. Fluorescein was used as a temperature-sensing probe, while glycerol–aq. ammonia solution was used as a working fluid. Fluorescence anisotropy of fluorescein was measured by varying various parameters. Apart from this, a comparison of fluorescence anisotropy and fluorescence intensity is also performed to demonstrate the validity of anisotropy to be applied in a microfluidic field with non-uniform liquid thickness. Viscosity dependence and temperature dependence on the anisotropy are also clarified; the results indicate an appropriate selection of relation between molecule size and viscosity is important to obtain a large temperature coefficient in anisotropy. Furthermore, a practical calibration procedure of the apparatus constant is proposed. In addition, the potential of temperature imaging is confirmed by the measurement of temperature distribution under focused laser heating.

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Section: Methodsmentioning

confidence: 99%

Fluorescence Anisotropy as a Temperature-Sensing Molecular Probe Using Fluorescein

2021

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“…In another work, Wang et al prepared a MnO 2 -phenol formaldehyde resin (MnO 2 –PFR; Table , entry 5) nanocomposite as a fluorescent turn-on probe for GSH and estimated the LOD to be as low as 7.6 nM . Recently, Ali et al developed a fluorescent nanoprobe composed of fluorescein dye (FLS; Table , entry 6) and MnO 2 NSs for sensing of H 2 O 2 in water and cosmetic samples . The fluorescence intensity was linear in the range of 40 nM to 30 μM ( R 2 = 0.998) and recorded the lowest LOD of 7 nM.…”

Section: Sensing Applicationsmentioning

confidence: 99%

“…163 Recently, Ali et al developed a fluorescent nanoprobe composed of fluorescein dye (FLS; Table 3, entry 6) and MnO 2 NSs for sensing of H 2 O 2 in water and cosmetic samples. 164 The fluorescence intensity was linear in the range of 40 nM to 30 μM (R 2 = 0.998) and recorded the lowest LOD of 7 nM. However, the use of organic fluorescent dyes for bioanalysis is sometimes restricted because of the requirement of toxic solvents.…”

Section: Sensing Applicationsmentioning

confidence: 99%

“…Besides carbon-based nanodots, several fluorescent materials were also used in conjugation with MnO 2 NSs to detect various analytes via FRET (Table ). − …”

Section: Sensing Applicationsmentioning

confidence: 99%

“…Several other fluorescent materials in combination with MnO 2 NSs were also reported for the detection of GSH and H 2 O 2 . − Chu and co-workers reported PDA (Table , entry 4) nanoparticles@MnO 2 NSs for the detection of GSH in human whole blood and achieved a LOD of 1.5 μM (Table , entry 4) . In another work, Wang et al prepared a MnO 2 -phenol formaldehyde resin (MnO 2 –PFR; Table , entry 5) nanocomposite as a fluorescent turn-on probe for GSH and estimated the LOD to be as low as 7.6 nM .…”

Section: Sensing Applicationsmentioning

confidence: 99%

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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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Ultrasensitive green spectrofluorimetric approach for quantification of Hg(II) in environmental samples (water and fish samples) using cysteine@MnO₂ dots

et al. 2023

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Mercury (Hg2+) is a natural element present in foods such as fish, water and soil. Exposure to mercury leads to severe toxic effects on the nervous, digestive, and immune systems. Here, a novel, green, and environmentally friendly fluorescent probe decorated with cysteine/MnO2 quantum dots (Cys@MnO2 QDs) was synthesized. This synthesis was carried out using a simple ultrasound technique with the aid of cysteine for fabricating Cys@MnO2 QDs to estimate Hg levels in fish and water samples. In this morphological study, Cys@MnO2 QDs were fully characterized using high‐resolution transmission electron microscopy, zeta potential analysis, fluorescence, ultraviolet–visible and infrared spectroscopy. The fluorescence of the synthesized Cys@MnO2 QDs was significantly quenched by gradually increasing the Hg(II) concentration. The quenching mechanism based on the Hg–S bonds strengthened the utility of the Cys@MnO2 QDs as a novel luminescent nanoprobe. The estimation of Hg was linear in the concentration range 0.7–100.0 ng mL−1 with a limit of quantitation equal to 0.30 ng mL−1. The Cys@MnO2 QDs are fluorescent probes with various benefits such as speed, ease of use, cost‐ effective, and being environmentally friendly; they are easily applied in food manufacturing and for public health improvement.

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One pot fabrication of fluorescein functionalized manganese dioxide for fluorescence “Turn OFF–ON” sensing of hydrogen peroxide in water and cosmetic samples

Abstract: The fluorometric nanoprobe was fabricated via doping of fluorescein dye in MnO2 nanosheets (FLS/MnO2 NS) via facile co-precipitation method. It was used for analysis of H2O2 in different matrices through liberation of FLS after reduction of MnO2 NS.

Cited by 21 publications

References 52 publications

Fluorescence Anisotropy as a Temperature-Sensing Molecular Probe Using Fluorescein

Fluorescence Anisotropy as a Temperature-Sensing Molecular Probe Using Fluorescein

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

Ultrasensitive green spectrofluorimetric approach for quantification of Hg(II) in environmental samples (water and fish samples) using cysteine@MnO₂ dots

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One pot fabrication of fluorescein functionalized manganese dioxide for fluorescence “Turn OFF–ON” sensing of hydrogen peroxide in water and cosmetic samples

Abstract: The fluorometric nanoprobe was fabricated via doping of fluorescein dye in MnO2 nanosheets (FLS/MnO2 NS) via facile co-precipitation method. It was used for analysis of H2O2 in different matrices through liberation of FLS after reduction of MnO2 NS.

Cited by 21 publications

References 52 publications

Fluorescence Anisotropy as a Temperature-Sensing Molecular Probe Using Fluorescein

Fluorescence Anisotropy as a Temperature-Sensing Molecular Probe Using Fluorescein

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

Ultrasensitive green spectrofluorimetric approach for quantification of Hg(II) in environmental samples (water and fish samples) using cysteine@MnO2 dots

Contact Info

Product

Resources

About

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

Ultrasensitive green spectrofluorimetric approach for quantification of Hg(II) in environmental samples (water and fish samples) using cysteine@MnO₂ dots