P-phenol derivatives as enhancers of the chemiluminescent luminol-horseradish peroxidase-H2O2 reaction: substituent effects

Sánchez, Francisco; Dı́az, A. Navas; García, J.A. González

doi:10.1016/0022-2313(95)00047-t

Cited by 24 publications

(8 citation statements)

References 10 publications

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“…The observed trend has been previously documented, and it is expected when considering that at very high amounts of catalyst, hydrogen peroxide is rapidly and entirely consumed to produce A very brilliant LS peak approached its maximum after approximately 1 min and then rapidly quenched, following a kinetic trace that has been previously observed in the literature when a very high concentration of peroxidase was adopted [19,37,44], or when luminol was in high excess with respect to hydrogen peroxide [41][42][43][44][45]. Instead, in the presence of HRP as a catalyst, only a modest LS was observed in the first 600 s, under these conditions, as previously reported for this catalytic system in the absence of enhancers [46].…”

Section: Assessment Of the Artificial Peroxidase Proficiency In Luminol Oxidationsupporting

confidence: 76%

“…Both batch and flow assays have been developed, even though only a limited response, in terms of linearity range and limit of detection (LOD), could be achieved [9,[21][22][23][24][25]. A substantial upgrade of the sensing capacity was accomplished both by enzyme immobilization onto different matrices and by LS enhancers [9,[22][23][24][25]45,46]. LS could be modulated by the presence of different organic molecules (generally aromatic), detergents, and metal ions, both in the enhancement and in the suppression of the emitted light, allowing the determination of several analytes [23][24][25].…”

Section: Hrp + H2o2  C-i + H2omentioning

confidence: 99%

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Use of an Artificial Miniaturized Enzyme in Hydrogen Peroxide Detection by Chemiluminescence

Zambrano

Nastri

Pavone

et al. 2020

Sensors

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Advanced oxidation processes represent a viable alternative in water reclamation for potable reuse. Sensing methods of hydrogen peroxide are, therefore, needed to test both process progress and final quality of the produced water. Several bio-based assays have been developed so far, mainly relying on peroxidase enzymes, which have the advantage of being fast, efficient, reusable, and environmentally safe. However, their production/purification and, most of all, batch-to-batch consistency may inherently prevent their standardization. Here, we provide evidence that a synthetic de novo miniaturized designed heme-enzyme, namely Mimochrome VI*a, can be proficiently used in hydrogen peroxide assays. Furthermore, a fast and automated assay has been developed by using a lab-bench microplate reader. Under the best working conditions, the assay showed a linear response in the 10.0–120 μM range, together with a second linearity range between 120 and 500 μM for higher hydrogen peroxide concentrations. The detection limit was 4.6 μM and quantitation limits for the two datasets were 15.5 and 186 μM, respectively. In perspective, Mimochrome VI*a could be used as an active biological sensing unit in different sensor configurations.

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Section: Assessment Of the Artificial Peroxidase Proficiency In Luminol Oxidationsupporting

confidence: 76%

Section: Hrp + H2o2  C-i + H2omentioning

confidence: 99%

Use of an Artificial Miniaturized Enzyme in Hydrogen Peroxide Detection by Chemiluminescence

Zambrano

Nastri

Pavone

et al. 2020

Sensors

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show abstract

“…Some enhancers of the chemiluminescent luminol-HRP-H 2 O 2 system were studied for their effects with respect to pH and concentration. The results demonstrated a previous conclusion that the active substituents in the para-position produced a greater increase in chemiluminescent properties at low concentration than those with deactivating substitutions [67].…”

Section: The Substituent Positionsupporting

confidence: 57%

Enzymatic Catalysis in the Synthesis of Polyanilines and Derivatives of Polyanilines

Xu¹,

Singh

Kaplan³

Enzyme-Catalyzed Synthesis of Polymers

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“…Therefore, FST-N was positively charged at pH 3, while negatively charged at pH 7 and 11. On the other hand, phenol can be considered as a weak acid with a pK a value of 9.89 (Sanchez et al 1995). Therefore, for pH values below 9.89, the predominant specie in solution is the molecular form of phenol, and for pH values above that, the aromatic ring becomes partially negatively charged by means of the hydroxyl group ionization and phenol deprotonates yielding negatively charged phenolate species.…”

Section: Effect Of Phmentioning

confidence: 99%

Efficient photocatalytic degradation of organic pollutants by magnetically recoverable nitrogen-doped TiO2 nanocomposite photocatalysts under visible light irradiation

Hamzezadeh-Nakhjavani

Tavakoli

Akhlaghi

et al. 2015

Environ Sci Pollut Res

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Preparation of novel nanocomposite particles (NCPs) with high visible-light-driven photocatalytic activity and possessing recovery potential after advanced oxidation process (AOP) is much desired. In this study, pure anatase phase titania (TiO2) nanoparticles (NPs) as well as three types of NCPs including nitrogen-doped titania (TiO2-N), titania-coated magnetic silica (Fe3O4 cluster@SiO2@TiO2 (FST)), and a novel magnetically recoverable TiO2 nanocomposite photocatalyst containing nitrogen element (Fe3O4 cluster@SiO2@TiO2-N (FST-N)) were successfully synthesized via a sol-gel process. The photocatalysts were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy (FE-SEM) with an energy-dispersive X-ray (EDX) spectroscopy analysis, X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS), and vibrating sample magnetometer (VSM). The photocatalytic activity of as-prepared samples was further investigated and compared with each other by degradation of phenol, as a model for the organic pollutants, in deionized (DI) water under visible light irradiation. The TiO2-N (55 ± 1.5%) and FST-N (46 ± 1.5%) samples exhibited efficient photocatalytic activity in terms of phenol degradation under visible light irradiation, while undoped samples were almost inactive under same operating conditions. Moreover, the effects of key operational parameters, the optimum sample calcination temperature, and reusability of FST-N NCPs were evaluated. Under optimum conditions (calcination temperature of 400 °C and near-neutral reaction medium), the obtained results revealed efficient degradation of phenol for FST-N NCPs under visible light irradiation (46 ± 1.5%), high yield magnetic separation and efficient reusability of FST-N NCPs (88.88% of its initial value) over 10 times reuse.

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P-phenol derivatives as enhancers of the chemiluminescent luminol-horseradish peroxidase-H2O2 reaction: substituent effects

Cited by 24 publications

References 10 publications

Use of an Artificial Miniaturized Enzyme in Hydrogen Peroxide Detection by Chemiluminescence

Use of an Artificial Miniaturized Enzyme in Hydrogen Peroxide Detection by Chemiluminescence

Enzymatic Catalysis in the Synthesis of Polyanilines and Derivatives of Polyanilines

Efficient photocatalytic degradation of organic pollutants by magnetically recoverable nitrogen-doped TiO2 nanocomposite photocatalysts under visible light irradiation

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