Silsesquioxane organofunctionalized with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole: Preparation and subsequent reaction with silver and potassium hexacyanoferrate(III) for detection of l-cysteine

Carmo, Devaney Ribeiro do; Silvestrini, Daniela Rodrigues; Silveira, Tayla Fernanda Serantoni da; Cumba, Loanda R.; Filho, Newton Luiz Dias; Soares, Layciane Aparecida

doi:10.1016/j.msec.2015.07.023

Cited by 18 publications

(4 citation statements)

References 40 publications

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“…The FTIR spectra of PUR-g-GO, MAF-g-GO, and FLU-g-GO demonstrated the presence of the CÀ N bond at a wavenumber of 1336 cm À 1 . [54] The peak seen at around 2980 cm À 1 is associated with the SÀ H vibration of GO functionalized with PUR, [55] as shown in Figure 1b. The presence of a prominent peak at around 1290 cm À 1 provides evidence for the existence of a sulfonic functional group in MAF grafted on GO [56] (Figure 1c).…”

Section: Ft-ir Analysis and Raman Spectroscopymentioning

confidence: 99%

Nanostructures Originated from Grafting Amino Group Containing Biomolecules on Graphene Oxide

Ghorbani,

Tarlani,

Taghvaei‐Ganjali

et al. 2024

ChemistrySelect

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With the aim of obtaining new composites from graphene oxide for a new biological application, it urged us to select some amine containing molecules namely purpald, mafenide acetate and fluvoxamine for grafting that was resulted to the formation of purpald‐grafted graphene oxide, mafenide‐grafted graphene oxide and fluvoxamine‐grafted graphene oxide, respectively. These novel nanocomposites were evaluated by X‐ray photoelectron spectroscopy, Transmission electron microscopy, Field emission scanning electron microscopy,Dynamic light scattering, Zeta potential, X‐ray diffraction, Thermogravimetric analysis, Raman, and Fourier‐transform infrared. The findings demonstrated that the grafting was done satisfactorily. X‐ray photoelectron spectroscopy analysis revealed that the peaks seen at 286.07, 285.79, and 285.49 eV corresponded to the formation of carbon‐nitrogen bonds between the amine groups of purpald, mafenide acetate, and fluvoxamine, respectively, and the functionalized oxygen groups present on the surface of graphene oxide. In this study, three nanocomposites were subjected to practical testing in close proximity to human breast cancer cells. After a period of 24 hours, it was shown that purpald‐grafted graphene oxide demonstrated more cellular toxicity compared to the other nanocomposites.

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Section: Ft-ir Analysis and Raman Spectroscopymentioning

confidence: 99%

Nanostructures Originated from Grafting Amino Group Containing Biomolecules on Graphene Oxide

Ghorbani,

Tarlani,

Taghvaei‐Ganjali

et al. 2024

ChemistrySelect

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“…The electrode external surface was smoothed with soft paper. A new surface can be produced by scraping out the old surface and replacing the carbon paste (do Carmo et al, 2003;do Carmo et al, 2015).…”

Section: Preparation Of the Carbon Paste Electrode Modified With Siconpmentioning

confidence: 99%

Electrocatalitic Detection of Hydrazine Using Chemically Modified Electrodes with Cobalt Pentacyanonitrosylferrate Adsorbed on the 3–Aminopropylsilica Surface

Sá¹,

Maraldi²,

Bonfim³

et al. 2017

IJC

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Cobalt pentacyanonitrosylferrate on the aminopropylsilica silica gel surface (SiCoNP) was previously prepared following two steps. The electrochemical behavior of SiCoNP modified electrode showed two redox couples, the first and second redox couples were observed at anodic potential (Epa) 1 = 0.36 and 0.60 V vs. Ag/AgCl attributed to the oxidation of Co (II) to Co (III) and Fe (II) (CN) 5 NO/Fe (III) (CN) 5 NO, respectively. The modified carbon paste electrode with SiCoNP was tested in the hydrazine electrooxidation. In the hydrazine electrooxidation, the H + release was observed and the two metal centers are involved in this process. The proposed mechanism has been described and based on studies of the effect of hydrogen ion concentration in the redox process of bivalent compound formed. Thus a large increase in hydrogen ion concentration promotes the formation of an intermediate electroactive species with an anodic peak at 0.56 V. The nature of this species is not well established but may be related to protonation of cyanide or NO groups present. The modified graphite paste electrode presented a limit of detection of 2.38×10 -4 mol L -1 and amperometric sensitivity of 1.37×10 -6 A.mol -1 .L.

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“…Purpald ® is a chemical material acting as a pigment and/or a colour exchanger agent used in the detection of aldehyde and aldehyde derivatives. Due to the S, C and N atoms present in the Purplad ® structure, it shows an ideal ligand effect for metal complexes (Chu et al, 2018;do Carmo et al, 2015;Wondracek et al, 2016;Hill et al, 2009). The goal of the present research is primarily to expose the similarity and discrepancy in electropolymerization conditions and electroactivities between the Purplad ® and p-phenylenediamine film coated electrodes.…”

Section: Introductionmentioning

confidence: 99%

4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (Purpald®)'un Elektropolimerizayonu

Soysal¹

2019

European Journal of Science and Technology

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In this study electropolymerization of 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (Purpald ®) on the disposable pencil graphite electrode (PGE) was described and the electroactivity of the polymer film coated and naked PG electrodes were checked against K3[Fe(CN)6] / K4[Fe(CN)6] in pH 8 Britton-Robinson (BR) buffer solution. The electropolymerization of Purpald ® film was performed with cyclic voltammetry (CV). The optimal conditions of Purpald ® film coated electrode were performed using electrochemical impedance spectroscopy (EIS). The conductivity of the Purplad ® modified electrodes was compared with bare and pphenylenediamine modified PG electrodes by EIS technique. The results indicated that electrosynthesized poly(Purplad ®) film could be used for modification of electrodes to be used in electrochemical analysis and sensor applications.

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Silsesquioxane organofunctionalized with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole: Preparation and subsequent reaction with silver and potassium hexacyanoferrate(III) for detection of l-cysteine

Cited by 18 publications

References 40 publications

Nanostructures Originated from Grafting Amino Group Containing Biomolecules on Graphene Oxide

Nanostructures Originated from Grafting Amino Group Containing Biomolecules on Graphene Oxide

Electrocatalitic Detection of Hydrazine Using Chemically Modified Electrodes with Cobalt Pentacyanonitrosylferrate Adsorbed on the 3–Aminopropylsilica Surface

4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (Purpald®)'un Elektropolimerizayonu

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