Dual-emission ratiometric probe combining carbon dots and CdTe quantum dots for fluorometric and visual determination of H2O2

Castro, Rafael C.; Soares, José X.; Ribeiro, David S.M.; Santos, João L.M.

doi:10.1016/j.snb.2019.126665

Cited by 55 publications

(13 citation statements)

References 42 publications

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“…Because of their unique properties, nanozymes have received widespread attention in the field of biosensing in recent years. According to previous reports, applications based on nanozyme sensing mainly contain electrochemical sensing [3], chemiluminescence sensing [4], surface-enhanced Raman scattering (SERS) sensing [5], fluorescence sensing [6], and colorimetric sensing [7]. Among these biosensor methods, sensing methods based on fluorescence and colorimetry have received extensive attention because of their convenience, cheapness, and high sensitivity [8].…”

Section: Introductionmentioning

confidence: 99%

Ce-MOF with Intrinsic Haloperoxidase-Like Activity for Ratiometric Colorimetric Detection of Hydrogen Peroxide

Cheng

Liang

et al. 2021

Biosensors

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Metal–organic framework (MOF) nanozymes, as emerging members of the nanozymes, have received more and more attention due to their composition and structural characteristics. In this work, we report that mixed-valence state Ce-MOF (MVCM) has intrinsic haloperoxidase-mimicking activity. MVCM was synthesized by partial oxidation method using Ce-MOF as a precursor. In the presence of H2O2 and Br−, MVCM can catalyze oxidative bromination of chromogenic substrate phenol red (PR) to produce the blue product bromophenol blue (Br4PR), showing good haloperoxidase-like activity. Because of the special chromogenic substrate, we constructed a ratiometric colorimetric-sensing platform by detecting the absorbance of the MVCM-(PR, Br−) system at wavelengths of 590 and 430, for quantifying H2O2, where the detection limit of the H2O2 is 3.25 μM. In addition, the haloperoxidase-mimicking mechanism of the MVCM is proposed. Moreover, through enzyme kinetics monitoring, the Km (H2O2 and NH4Br) of the MVCM is lower than that of cerium oxide nanomaterials, indicating that the MVCM has a stronger binding affinity for H2O2 and NH4Br than other materials. This work provides more application prospects for the development of nanozymes in the field of biosensors in the future.

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Section: Introductionmentioning

confidence: 99%

Ce-MOF with Intrinsic Haloperoxidase-Like Activity for Ratiometric Colorimetric Detection of Hydrogen Peroxide

Cheng

Liang

et al. 2021

Biosensors

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“…Além disso, os autores relataram como sendo raro a emissão dual com única excitação em C-dots. O comportamento de emissão dual na faixa de excitação 260-340 nm pode ser explorado para aplicações em sensores raciométricos de diversos analitos ambientais e biológicos, os quais vêm atraindo atenção devido às suas vantagens em relação aos de canal único, principalmente a eliminação das interferências ambientais e resposta de sinal visual [28][29][30][31][32][33]. Assim, como esperado, a dopagem com o enxofre influenciou as propriedades estruturais e ópticas dos C-dots obtidos.…”

Section: Resultados E Discussõesunclassified

Síntese De Carbon Dots a Partir De Derivados De Anilina a Fim De Avaliar O Efeito Dos Substituintes Nas Propriedades Fotofísicas E Estruturais / Synthesis of Carbon Dots From Aniline Derivatives in Order to Evaluate the Effect of Substituents on Photophysical and Structural Properties

Davi

Lima

Barbosa

2021

BJD

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Os carbon dots (C-dots) são nanopartículas de carbono luminescentes, biocompatíveis, solúveis em água e que podem ser obtidos a partir de vários precursores, incluindo as moléculas orgânicas. As propriedades fotofísicas e estruturais dos C-dots são dependentes de vários parâmetros sintéticos, a exemplo do uso de diferentes solventes e reagentes/dopantes moleculares. Diante disso, foram sintetizados C-dots pelo método hidrotermal a partir da o-fenildiamina (o-PD) e do o-aminotiofenol (o-ATP), dopados com nitrogênio e codopados com nitrogênio (N) e enxofre (S), respectivamente, a fim de se verificar a influência desses átomos nas suas propriedades fotofísicas e estruturais. Os C-oATP e C-oPD exibiram emissão de fluorescência no azul e laranja sob irradiação UV (365 nm), e distribuição de tamanho médio de 3,06 e 3,62 nm, respectivamente. As análises de FTIR e UV-Vis dos C-dots evidenciaram a influência dos dopantes em suas estruturas, as quais exibiram grupos sulfurados e/ou nitrogenados na superfície dependendo da molécula precursora. Os C-oPD apresentaram uma banda de absorção em 434 nm caraterística de grupos nitrogenados de derivados de anilina. As propriedades fotofísicas também foram influenciadas pelos dopantes, em que os C-oPD exibiram emissão dual em 385 nm e 560 nm quando excitados na faixa de 260 até 340 nm e uma

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“…[22][23][24] The ratiometric fluorescence assay, which is composed of two independent fluorescence signals, can enhance the anti-jamming capability of the sensing technique by effectively avoiding the influences caused by instruments and environments. 25,26 Porphyrins, which can specifically bind with different metal ions, have drawn enormous attention in the quantification of several poisonous metal ions according to the one-way fluorescence change of porphyrin derivatives. 27,28 In combination with fluorescent porphyrins, CD-based ratiometric fluorescence assays are used as the most promising alternatives for the detection of various substances.…”

Section: Introductionmentioning

confidence: 99%

Ultrasensitive ratiometric fluorescent probes for Hg(ii) and trypsin activity based on carbon dots and metalloporphyrin via a target recycling amplification strategy

Huang

Yao

Gan

et al. 2022

Analyst

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Dual-emission ratiometric probe combining carbon dots and CdTe quantum dots for fluorometric and visual determination of H2O2

Cited by 55 publications

References 42 publications

Ce-MOF with Intrinsic Haloperoxidase-Like Activity for Ratiometric Colorimetric Detection of Hydrogen Peroxide

Ce-MOF with Intrinsic Haloperoxidase-Like Activity for Ratiometric Colorimetric Detection of Hydrogen Peroxide

Síntese De Carbon Dots a Partir De Derivados De Anilina a Fim De Avaliar O Efeito Dos Substituintes Nas Propriedades Fotofísicas E Estruturais / Synthesis of Carbon Dots From Aniline Derivatives in Order to Evaluate the Effect of Substituents on Photophysical and Structural Properties

Ultrasensitive ratiometric fluorescent probes for Hg(ii) and trypsin activity based on carbon dots and metalloporphyrin via a target recycling amplification strategy

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