The use of modified electrodes by hybrid systems gold nanoparticles/Mn-porphyrin in electrochemical detection of cysteine

Gallo, Mariana C.; Pires, Bruno Morandi; Toledo, Kalil Cristhian Figueiredo; Jannuzzi, Sergio Augusto Venturinelli; Arruda, Eduardo Guimarães Ratier de; Formiga, André Luiz Barboza; Bonacin, Juliano Alves

doi:10.1016/j.synthmet.2014.10.024

Cited by 34 publications

(18 citation statements)

References 33 publications

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“…A detailed comparison of cysteine oxidation parameters with several reported electrodes are summarized in Table . The LOD calculated for cysteine determination at GC/rGO‐VO(salen) and GC/SWCNTs‐VO(salen) is lower than most of the other methods –. The LOD reported at cobalt phthalocyanine modified carbon bulk electrode (0.2 μM), silver nanoparticles‐carbon nanotubes‐reduced graphene oxide composite modified GC electrode (300 pM) and at GC electrode with electrodeposited zinc oxide (ZnOx) nanoparticles (0.05 μM) are lower than that observed at GC/rGO‐VO(salen) and GC/SWCNTs‐VO(salen) electrodes.…”

Section: Resultsmentioning

confidence: 99%

“…Sensitivity and limit of detection (LOD, signal‐to‐noise ratio of 3) are calculated as 4.43 μAmM −1 cm −2 & 0.4 μM for rGO‐VO(salen) and 15.71 μAmM −1 cm −2 & 0.5 μM for GC/SWCNTs‐VO(salen). A detailed comparison of cysteine oxidation parameters with several reported electrodes are summarized in Table . The LOD calculated for cysteine determination at GC/rGO‐VO(salen) and GC/SWCNTs‐VO(salen) is lower than most of the other methods –.…”

Section: Resultsmentioning

confidence: 99%

“…L‐cysteine supports the metabolism of various essential biochemicals like glutathione, heparin and biotin . The quantitative determination of L‐cysteine is useful as an indicator of certain diseases such as Parkinson's disease, hyperhomocysteinemia, cancer and auto immune disease . The major challenge for the electrochemical determination of cysteine is the electrode fouling and low sensitivity .…”

Section: Introductionmentioning

confidence: 99%

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Dual Electrocatalytic Behavior of Oxovanadium(IV) Salen Immobilized Carbon Materials Towards Cysteine Oxidation and Cystine Reduction: Graphene Versus Single Walled Carbon Nanotubes

et al. 2016

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Oxovanadium(IV) salen (VO(salen)) (where salen=N,N’‐bis(salicylidene)ethylenediamine) is embedded onto reduced graphene oxide (rGO) and single walled carbon nanotubes (SWCNTs). The resulting materials, VO(salen) embedded rGO (rGO‐VO(salen)) and VO(salen) embedded SWCNTs (SWCNTs‐VO(salen)) show remarkable electrocatalytic activity for cysteine oxidation and cystine (the oxidized product of cysteine) reduction as demonstrated by cyclic voltammetry (CV). The materials, rGO‐VO(salen) and SWCNTs‐VO(salen) are characterized through spectroscopic and microscopic techniques. Transmission electron microscopy exhibits nanocrystalline view of VO(salen) on rGO‐VO(salen) while it appears like aggregated nodules in the SWCNTs‐VO(salen) revealing the nano‐structures excellently. Electrochemical cysteine oxidation is studied using rGO‐VO(salen) coated glassy carbon (GC) electrode (GC/rGO‐VO(salen)) and SWCNTs‐VO(salen) coated GC electrode (GC/SWCNTs‐VO(salen)). The efficiency of the catalytic platforms is compared. Overall number of electrons and electron transfer rate constant are obtained using rotating disc electrode for cysteine oxidation at GC/rGO‐VO(salen) and GC/SWCNTs‐VO(salen). Calibration curves for the determination of cysteine at GC/rGO‐VO(salen) and GC/SWCNTs‐VO(salen) exhibit linear range from 1.0 μM to 5.0 mM and 1.0 μM to 4.0 mM, respectively. GC/rGO‐VO(salen) and GC/SWCNTs‐VO(salen) are successfully applied for the real samples analysis with remarkable recovery.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dual Electrocatalytic Behavior of Oxovanadium(IV) Salen Immobilized Carbon Materials Towards Cysteine Oxidation and Cystine Reduction: Graphene Versus Single Walled Carbon Nanotubes

et al. 2016

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“…Manganese(III) complex of 5,10,15,20-tetrakis(pentafluorophenyl)porphyrin and gold nanoparticles deposited on fluorine tin oxide-(FTO-) coated glass electrodes were successfully used in the amperometric sensing of cysteine [28].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Mn-Porphyrin-Nanogold Nanomaterial Applied for the Spectrophotometric Detection ofβ-Carotene

Lascu

Bîrdeanu

Țăranu

et al. 2018

Journal of Chemistry

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A hybrid formed between Mn(III) tetratolyl-porphyrin chloride (MnTTPCl) and spherical gold colloid (n-Au), MnTTPCl/n-Au, was tested along with its component nanomaterials as promising candidates in the detection of β-carotene from ethanol solutions. Among the investigated nanomaterials, the largest β-carotene concentration interval detectable by UV-Vis spectrophotometry (9.80 × 10 −6 M-1.15 × 10 −4 M) was obtained when using the MnTTPCl/n-Au hybrid. is hybrid material gives rise to the widest absorption band, covering the range of 425 nm to 581 nm after treatment with β-carotene.

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“…Additionally, porphyrins can be associated with gold nanoparticles [17][18][19] or coordination compounds, promoting unique synergistic effects [20]. Among the electroactive films used for nitrite detection, systems based on ruthenium-porphyrin obtained by electropolymerization [21] or by electrostatic self-assembly [22] can be highlighted due to their great stability, high electrocatalytic response, ability to prevent electrode poisoning.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic and electrochemical behavior of a supramolecular tetrapyridylporphyrin encompassing four terpyridine(oxalate)chloridoruthenium(II) complexes and its use in nitrite sensors

Bonacin

Katic

Toledo

et al. 2015

Inorganica Chimica Acta

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The use of modified electrodes by hybrid systems gold nanoparticles/Mn-porphyrin in electrochemical detection of cysteine

Cited by 34 publications

References 33 publications

Dual Electrocatalytic Behavior of Oxovanadium(IV) Salen Immobilized Carbon Materials Towards Cysteine Oxidation and Cystine Reduction: Graphene Versus Single Walled Carbon Nanotubes

Dual Electrocatalytic Behavior of Oxovanadium(IV) Salen Immobilized Carbon Materials Towards Cysteine Oxidation and Cystine Reduction: Graphene Versus Single Walled Carbon Nanotubes

Hybrid Mn-Porphyrin-Nanogold Nanomaterial Applied for the Spectrophotometric Detection ofβ-Carotene

Spectroscopic and electrochemical behavior of a supramolecular tetrapyridylporphyrin encompassing four terpyridine(oxalate)chloridoruthenium(II) complexes and its use in nitrite sensors

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