Sub-monolayer assemblies of octanethiol and octadecylthiol at gold electrodes for the direct analysis of 4,4′-oxydianiline in wastewaters and shoe-dyeing samples

Domínguez, C. S. H.; Quintana, Carmen; Vicente, J.; Hernández, Pedro; Hernández, L.

doi:10.1016/j.talanta.2007.08.006

Cited by 6 publications

(6 citation statements)

References 12 publications

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“…These results are quite similar [25] or even better [29] than the other previously reported which the advantages regarding the added selectivity respect potential negative interferences derived from the use of the CB. Therefore, no chromatographic separation or previous derivatization of the target compound is required.…”

supporting

confidence: 88%

“…In presence of salts in the modifier solution, 2 hours of adsorption leads to CB [6] layers with some defects, however, higher adsorption times lead to CB [6] linear polymers [24]. On the other hand, the use of a penthanethiol to avoid the defects in the monolayers of well-known macrocyclic receptors as cyclodextrins, has been previously reported [25,26]. Therefore, and on the base of these works, we have employed the modification procedure described above (see Section 2.3) to develop an electrochemical sensor based on CB [6].…”

Section: Resultsmentioning

confidence: 99%

“…To test the results obtained by the electrochemical procedure proposed, both samples were analyzed by a reversed-phase HPLCÀUV method with detection at 254 nm [25]. Working with a Kromasil C18, ( …”

Section: Analytical Applicationmentioning

confidence: 99%

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Self‐Assembled Monolayers of Cucurbit[6]uril on a Gold Electrode for 4,4′‐Oxydianiline Determination. Analytical Application

2013

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Self-assembled monolayers of cucurbit [6]uril (CB[6]) on a gold electrode have been used for 4,4'-oxydialine (ODA) analysis. The formation of the supramolecular complex between ODA and CB[6] was used for the molecular selection and the electroanalytical determination of this analyte. In addition to this, all the parameters affecting the modification of the gold electrode and the determination of 4,4'-oxydianiline were optimized by square wave voltammetry. Upon the electrode modification, pentanethiol was employed to fill up the exposed surface between CB[6] molecules. The calculated detection and determination limits were 0.06 mg mL À1 and 0.19 mg mL À1, respectively, with good accuracy and precision as shown by the calculated values for the relative error and relative standard deviation (E r = 0.1 % and RDS = 2.9 %; n = 10 ). Moreover, the developed methodology was successfully applied to the 4,4'-oxydialine determination in real wastewaters and shoe-dyeing samples.

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supporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

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Self‐Assembled Monolayers of Cucurbit[6]uril on a Gold Electrode for 4,4′‐Oxydianiline Determination. Analytical Application

2013

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“…Most of the analytical methods developed for Oxy determination are based on chromatographic techniques with UV or MS detection. [35][36][37][38] However, despite of its simplicity and high sensitivity, electrochemical techniques are scarcely employed for Oxy determination [39,40].…”

Section: Introductionmentioning

confidence: 99%

Differential pulse voltammetric determination of the carcinogenic diamine 4,4′-oxydianiline by electrochemical preconcentration on a MoS2 based sensor

Pozo¹,

Sánchez‐Sánchez

Vázquez

et al. 2019

Microchim Acta

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We present an electrochemical sensor towards 4,4'-oxydianiline (Oxy) determination based on the ability of MoS 2 for diamine adsorption and preconcentration. It consists of a glassy carbon electrode covered by drop-casting with MoS 2 nanosheets obtained by exfoliation in 45% EtOH/H 2 O mixture. X-Ray Photoemission Spectroscopy indicates that Oxy accumulates on the MoS 2 surface through an electropolymerization process similar to that reported for aniline. We use both, electrochemical impedance spectroscopy and atomic force microscopy for the characterization of the electrode surfaces at the different stages of the device fabrication. The electrochemical sensor allows the detection of Oxy at 8 ×10 -8 M level with Er (%) and RSD (%) values lower than 8.3 and 5.6, respectively, in all the concentration range assayed. The methodology proposed was applied to the selective Oxy determination in real river water samples, showing very good selectivity and recoveries of around 95% in average. KeynotesTransition metal dichalcogenides; electrochemical detection; 4-4´Oxydianiline preconcentration; X-ray photoemission spectroscopy; atomic force microscopy

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“…On the other hand, nonfunctionalized alkanethiol selfassembled monolayers have served as model organic surfaces in fundamental studies of molecular adsorptions, wetting and lubrication [36]. For these reasons, there are more analytical procedures involving SAMs formation of alkanethiols with terminal functional groups than those with CH 3 [37].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Chain Length of Alkanethiols in Self‐Assembled Submonolayers on the Electrochemical Response of Aromatic Amine Mixtures

et al. 2008

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Alkanethiols, such as di-n-octadecyldisulfide, octanethiol, and ethanethiol, have been employed for self-assembled monolayers on a gold electrode to study the influence of their chain length on the electrochemical response of aniline and 4-aminobiphenyl. The responses of individual solutions and mixtures of both compounds show that the organization of the submonolayer built can improve the selectivity in the electrochemical analysis of those aromatic amines. The use of C8 10 À2 M allows the analysis of 4-aminobiphenyl avoiding the aniline response. A better resolution for the analysis of those amine mixtures was obtained if a C18 10 À6 M modified gold electrode was used instead of an unmodified one.

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Sub-monolayer assemblies of octanethiol and octadecylthiol at gold electrodes for the direct analysis of 4,4′-oxydianiline in wastewaters and shoe-dyeing samples

Cited by 6 publications

References 12 publications

Self‐Assembled Monolayers of Cucurbit[6]uril on a Gold Electrode for 4,4′‐Oxydianiline Determination. Analytical Application

Self‐Assembled Monolayers of Cucurbit[6]uril on a Gold Electrode for 4,4′‐Oxydianiline Determination. Analytical Application

Differential pulse voltammetric determination of the carcinogenic diamine 4,4′-oxydianiline by electrochemical preconcentration on a MoS2 based sensor

Influence of the Chain Length of Alkanethiols in Self‐Assembled Submonolayers on the Electrochemical Response of Aromatic Amine Mixtures

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