Electrochemical behavior of hydroquinone and catechol at glassy carbon electrode modified by electropolymerization of tetraruthenated oxovanadium porphyrin

Ribeiro, Gabriel H.; Vilarinho, Luana M.; Ramos, Thiago dos S.; Bogado, André L.; Dinelli, Luís R.

doi:10.1016/j.electacta.2015.06.139

Cited by 49 publications

(21 citation statements)

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“…The analytical features observed in the determination of catechol and those reported previously in the literature using the modified electrodes are shown in Table . The detection limit of the sensor developed in this study is comparable, or better than, those described in the literature .…”

Section: Resultssupporting

confidence: 68%

Copper‐based Metal‐organic Framework Applied in the Development of an Electrochemical Biomimetic Sensor for Catechol Determination

et al. 2017

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In this study, the synthesis and characterization of a Cu‐based metal‐organic framework (MOF) [Cu3(BTC)2(H2O)3]n (where BTC=benzene‐1,3,5‐tricarboxylate), known as HKUST‐1, were performed. The Cu‐MOF was applied in the modification of a carbon paste to obtain a biomimetic sensor for the electrochemical determination of catechol. Kinetic assays confirmed that the Cu‐MOF acts as a catalyst for the oxidation of catechol and it can be considered as a catechol oxidase mimetic. Under optimized conditions, the calibration curve for catechol presented a linear range of 8.0×10−7 to 3.2×10−5 mol L−1, with detection limit of=1.0×10−7 mol L−1. The sensor demonstrated good intra‐day repeatability and inter‐electrode reproducibility (relative standard deviations of 3.8 % (n=10) and 4.3 % (n=6), respectively). In the selectivity study, an adequate peak‐to‐peak separation was observed for hydroquinone and uric acid in relation to catechol, demonstrating that this sensor has the potential for use in the simultaneous determination of these compounds. This sensor was successfully applied in the determination of catechol in water samples.

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Section: Resultssupporting

confidence: 68%

Copper‐based Metal‐organic Framework Applied in the Development of an Electrochemical Biomimetic Sensor for Catechol Determination

et al. 2017

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“…The detection limit of the determinations, evaluated on the basis of S/N=3 was found to be 0.2 μmol L −1 for HQ and 0.5 μmol L −1 for CC. It is acceptable, compared with data reported in the literature, which show that the detection limits reached by applying DPV and modified electrodes vary in the range from 0.007 μmol L −1 to 50 μmol L −1 for HQ and from 0.009 μmol L −1 to 50 μmol L −1 for CC . Costly materials and complicated techniques for electrode modification were required to achieve lower limits of detection by DPV.…”

Section: Resultsmentioning

confidence: 99%

Simultaneous Determination of Hydroquinone and Catechol by Differential Alternative Pulses Voltammetry

et al. 2018

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The second order voltammetric technique of high resolution, Differential Alternative Pulses Voltammetry (DAPV), was applied for the simultaneous determination of hydroquinone (HQ) and catechol (CC) on bare spectroscopic graphite electrode. Well resolved anodic and cathodic peaks situated on both sides of the zero line were obtained, while the differential pulse voltammograms were overlapped. The linear concentration range for HQ and CC quantification by DAPV was extended up to 20 μmol L−1 for both the isomers. The sensitivity of the determination was found to be 6.00 μA L μmol−1 and 3.61 μA L μmol−1, while the limit of detection reached was 0.2 μmol L−1 and 0.5 μmol L−1 for HQ and CC, respectively. No interference was observed from the commonly coexisting organic species such as resorcinol, phenol and p‐benzoquinone. The great resolution power of DAPV permitted obtaining excellent results without any electrode modification and any mathematical data processing.

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“…This process can be controlled by voltammetric cycles, and consequently the polymeric film thickness formed on the electrode. Recently, the simultaneous determination of CC and hydroquinone (HQ) was reported using a modified GCE with the {VOTPyP[RuCl 3 (dppb)] 4 } porphyrin [ 46 ]. In this study, it was demonstrated that the modified electrode (VOTPRu-GCE) improves the electrochemical response of CC and HQ when compared with the bare GCE.…”

Section: Introductionmentioning

confidence: 99%

An electronic device based on gold nanoparticles and tetraruthenated porphyrin as an electrochemical sensor for catechol

et al. 2017

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The aim of this study was to obtain an electrochemical device between the electrostatic interaction of the electropolymerized porphyrin {CoTPyP[RuCl3(dppb)]4}, where TPyP = 5,10,15, 20-tetrapyridilphorphyrin and dppb = 1,4-bis(diphenylphosphino)butane, and gold nanoparticles (AuNPsn−), to be used as a voltammetric sensor to determine catechol (CC). The modified electrode, labelled as [(CoTPRu4)n8+-BE]/AuNPsn− {where BE = bare electrode = glassy carbon electrode (GCE) or indium tin oxide (ITO)}, was made layer-by-layer. Initially, a cationic polymeric film was generated by electropolymerization of the {CoTPyP[RuCl3(dppb)]4} onto the surface of the bare electrode to produce an intermediary electrode [(CoTPRu4)n8+-BE]. Making the final electronic device also involves coating the electrode [(CoTPRu4)n8+-BE] using a colloidal suspension of AuNPsn− by electrostatic interaction between the species. Therefore, a bilayer labelled as [(CoTPRu4)n8+-BE]/AuNPsn− was produced and used as an electrochemical sensor for CC determination. The electrochemical behaviour of CC was investigated using cyclic voltammetry at [(CoTPRu4)n8+-GCE]/AuNPsn− electrode. Compared to the GCE, the [(CoTPRu4)n8+-GCE]/AuNPsn− showed higher electrocatalytic activity towards the oxidation of CC. Under the optimized conditions, the calibration curves for CC were 21–1357 µmol l−1 with a high sensitivity of 108 µA µmol l−1 cm−2. The detection limit was 1.4 µmol l−1.

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Electrochemical behavior of hydroquinone and catechol at glassy carbon electrode modified by electropolymerization of tetraruthenated oxovanadium porphyrin

Cited by 49 publications

References 50 publications

Copper‐based Metal‐organic Framework Applied in the Development of an Electrochemical Biomimetic Sensor for Catechol Determination

Copper‐based Metal‐organic Framework Applied in the Development of an Electrochemical Biomimetic Sensor for Catechol Determination

Simultaneous Determination of Hydroquinone and Catechol by Differential Alternative Pulses Voltammetry

An electronic device based on gold nanoparticles and tetraruthenated porphyrin as an electrochemical sensor for catechol

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