Ratiometric fluorescence method for malachite green detection based on dual-emission BSA-protected gold nanoclusters

Ju, Yan Jun; Li, Na; Liu, Shi Gang; Han, Lei; Xiao, Na; Luo, Hong Qun

doi:10.1016/j.snb.2018.08.052

Cited by 61 publications

(13 citation statements)

References 41 publications

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“…In view of this, it is necessary to exploit a rapid and practical method in testing MG. Many methods were used in MG measurement, such as surface-enhanced Raman spectroscopy (SERS), − chromatography, spectrophotometry, − etc. Most methods of detecting MG are based on spectrophotometry, such as UV–vis spectrophotometry, but the MG adsorption process by adsorbent usually takes a long time.…”

Section: Introductionmentioning

confidence: 99%

A Europium-based MOF Fluorescent Probe for Efficiently Detecting Malachite Green and Uric Acid

et al. 2020

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Lanthanide (such as Tb and Eu) metal–organic frameworks (MOFs) have been widely used in fluorescent probes because of their multiple coordination modes and brilliant fluorescence characteristic. Many lanthanide MOFs were applied in detecting metal ions, inorganic anions, and small molecules. However, it’s rarely reported that Ln-MOF was devoted to detecting malachite green (MG) and uric acid (UA). We prepared a europium-based metal–organic framework (Eu-TDA) (TDA = 2,5-thiophenedicarboxylic acid group). Luminescence studies demonstrated that Eu-TDA can rapidly detect MG and UA with excellent selectivity and sensitivity, where individual quenching efficiency K sv (MG: 5.8 × 105 M–1; UA: 4.15 × 104 M–1) and detection limit (MG: 0.0221 μM; UA: 0.689 μM) were regarded as the excellent MOF sensors for detecting MG and UA. The quenching of Eu-TDA’s fluorescence emission by MG and UA was likely due to the spectral overlap, energy transfer, and competition. Among 11 metal cations and 14 anions, Eu-TDA can quickly and effectively recognize MG and UA with highly selective and sensitive properties. Our method possesses potential application in detecting UA in human blood and MG in the fishpond.

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Section: Introductionmentioning

confidence: 99%

A Europium-based MOF Fluorescent Probe for Efficiently Detecting Malachite Green and Uric Acid

et al. 2020

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“…The two characteristic peaks at 84.1 and 87.6 eV were ascribed to Au 4f 7/2 and Au 4f 5/2 , suggesting the coexistence of Au(0) and Au(I) in the AuNCs of AMIT NPs. 43 The peaks at 642.1 and 653.5 eV were attributed to Mn 2p3/2 and Mn 2p1/2, suggesting that KMnO 4 was successfully reduced to MnO 2 during the preparation of AMIT NPs. 44 Furthermore, the coexistence of Au, Mn, O, and S in the elemental mapping images (Figure 1D) and representative peaks of each element in the EDS spectrum (Figure 1E) further proved the successful assembly of each component.…”

Section: ■ Results and Discussionmentioning

confidence: 96%

Intelligent Tumor Microenvironment-Activated Multifunctional Nanoplatform Coupled with Turn-on and Always-on Fluorescence Probes for Imaging-Guided Cancer Treatment

Sun

Wang

Liu

et al. 2021

ACS Appl. Mater. Interfaces

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Intrinsic tumor microenvironment (TME)-related therapeutic resistance and nontumor-specific imaging have limited the application of imaging-guided cancer therapy. Herein, a TME-responsive MnO2-based nanoplatform coupled with turn-on and always-on fluorescence probes was designed through a facile biomineralization method for imaging-guided photodynamic/chemodynamic/photothermal therapy (PDT/CDT/PTT). After the tumor-targeting delivery of the AuNCs@MnO2-ICG@AS1411 (AMIT) nanoplatform via aptamer AS1411, the TME-responsive dissociation of MnO2 generated sufficient O2 and Mn2+ with the consumption of GSH for improving PDT efficacy and Fenton-like reaction-mediated CDT. Simultaneously, the released small-sized ICG and AuNCs facilitated PDT and PTT efficacy via the deep tumor penetration. Moreover, the turn-on fluorescence of AuNCs revealed the real-time TME-responsive MnO2 degradation process, and the always-on ICG fluorescence enabled the in situ monitoring of the payload distribution in vitro and in vivo. The AMIT NPs also provided magnetic resonance and thermal imaging guidance for the enhanced PDT, CDT, and PTT. Therefore, this all-in-one nanosystem provides a simple and versatile strategy for multiple imaging-guided theranostic applications.

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“…Fluorescence detection mostly adopts single-emission peak probe, which is affected by environmental variation, probe concentration change, and instrumental fluctuation [21] , [22] . Compared with single-emission fluorescence analysis, ratiometric fluorescence method adds internal standard calibration in the detection system, which has the advantages of high stability and low detection background [21] , [23] , [24] .…”

Section: Introductionmentioning

confidence: 99%

Construction of ratiometric Si-Mn:ZnSe nanoparticles for the immunoassay of SARS-CoV-2 spike protein

Mao¹,

Li²,

Wu³

et al. 2022

Sensors and Actuators B: Chemical

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Ratiometric fluorescence method for malachite green detection based on dual-emission BSA-protected gold nanoclusters

Cited by 61 publications

References 41 publications

A Europium-based MOF Fluorescent Probe for Efficiently Detecting Malachite Green and Uric Acid

A Europium-based MOF Fluorescent Probe for Efficiently Detecting Malachite Green and Uric Acid

Intelligent Tumor Microenvironment-Activated Multifunctional Nanoplatform Coupled with Turn-on and Always-on Fluorescence Probes for Imaging-Guided Cancer Treatment

Construction of ratiometric Si-Mn:ZnSe nanoparticles for the immunoassay of SARS-CoV-2 spike protein

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