Self-assembly of simple Schiff base ligand into unique saddle-type [4x4] tetranuclear architecture and its application as selective voltammetric dopamine sensor in aqueous conditions

Nowicka, Daria; Kubicki, Maciej; Patroniak, Violetta; Łuczak, Teresa; Gorczyński, Adam

doi:10.1016/j.electacta.2023.143754

Cited by 4 publications

(2 citation statements)

References 38 publications

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“…It can be seen that CuTA@Cu/GCE has a pair of well-defined redox peaks at the moderate potential of 0.085 and −0.272 V, respectively (Figure 4A, curve a), which is consistent with the electron exchange of Cu(II)/Cu(I) couple. 36,37 This result can be confirmed by the calculation of electron transfer number (n = 1) from the peak current and Faraday equation 38,39 (see detailed calculation in the Supporting Information). Figure 4C displays the CV response of CuTA@Cu/GCE at various scan rates (v).…”

Section: Physical Characterization Of Biosensing Interfacessupporting

confidence: 59%

Copper(II)-Tannic Acid@Cu with In Situ Grown Gold Nanoparticles as a Bifunctional Matrix for Facile Construction of Label-Free and Ultrasensitive Electrochemical cTnI Immunosensor

Liu,

Yang,

et al. 2024

ACS Appl. Bio Mater.

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Sensitive detection of cardiac troponin I (cTnI) is of great significance in the diagnosis of a fatal acute myocardial infarction. A redox-active nanocomposite of copper(II)-tannic acid@Cu (CuTA@Cu) was herein prepared on the surface of a glassy carbon electrode by electrochemical deposition of metallic copper combined with a metal stripping strategy. Then, HAuCl 4 was in situ reduced to gold nanoparticles (AuNPs) by strong reductive catechol groups in the TA ligand. The AuNPs/CuTA@ Cu composite was further utilized as a bifunctional matrix for the immobilization of the cTnI antibody (anti-cTnI), producing an electrochemical immunosensor. Electrochemical tests show that the immunoreaction between anti-cTnI and target cTnI can cause a significant reduction of the electrochemical signal of CuTA@Cu. It can be attributed to the insulating characteristic of the immunocomplex and its barrier effect to the electrolyte ion diffusion. From the signal changes of CuTA@Cu, cTnI can be analyzed in a wide range from 10 fg mL −1 to 10 ng mL −1 , with an ultralow detection limit of 0.65 fg mL −1 . The spiked recovery assays show that the immunosensor is reliable for cTnI determination in human serum samples, demonstrating its promising application in the early clinical diagnosis of myocardial infarction.

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Section: Physical Characterization Of Biosensing Interfacessupporting

confidence: 59%

Copper(II)-Tannic Acid@Cu with In Situ Grown Gold Nanoparticles as a Bifunctional Matrix for Facile Construction of Label-Free and Ultrasensitive Electrochemical cTnI Immunosensor

Liu,

Yang,

et al. 2024

ACS Appl. Bio Mater.

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“…Therefore, the inhibition mechanism of DA on luminol CL is assigned to the competitive reaction between DA and luminol with K 3 Fe(CN) 6 . The established BPQD–luminol–K 3 Fe(CN) 6 CL system for DA detection was compared with the previously reported methods, as summarized in Table . ,− In addition, the analytical results for DA detection achieved by QD-based systems are plotted in Figure d. Compared with the technologies such as capillary electrophoresis–chemiluminescence (CE–CL), electrochemiluminescence (ECL), electrochemistry (EC), and photoelectrochemistry (PEC), the novel BPQD–luminol–K 3 Fe(CN) 6 CL system demonstrates the excellent detection range and detection limit for DA detection.…”

Section: Resultsmentioning

confidence: 99%

Black Phosphorus Quantum Dots with Exposed (113) Planes on Chemiluminescent Luminol–K₃Fe(CN)₆ for Detection of Dopamine

Zhao,

Yang,

Yang

et al. 2024

ACS Appl. Nano Mater.

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Exploring the possible catalytic effect of black phosphorus quantum dots (BPQDs) with specific exposed planes on chemiluminescence (CL) to improve CL intensity and achieve excellent analytical performance is one of the latest research hotspots. Herein, uniform BPQDs with highly exposed (113) facets and an average size of 2.2 nm were fabricated via a facile ultrasonic exfoliation strategy. The enhanced CL intensity in the BPQDs−luminol−K 3 Fe(CN) 6 system is attributed to the catalytic effect of BPQDs. The catalytic mechanism of BPQDs involved in luminol−K 3 Fe(CN) 6 CL is revealed by theoretical calculations, which show an adsorption Gibbs free energy for oxygen of −0.86 eV, accompanied by the separation of electron−hole pairs (e − − h + ). In other words, after being irradiated by the CL generated from luminol and K 3 Fe(CN) 6 , the BPQDs effectively catalyze the decomposition of dissolved oxygen to produce superoxide radical anions, which further react with luminol to increase CL emission. The noticeable suppression of the CL signal in the presence of dopamine acquired under mild conditions makes it attractive for biosensor applications, deepening the understanding of BPQDs as efficient catalysts and promoting the potential development of BPQD-based materials in the fields of photonics, biomedicine, and electronics.

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Advanced Schiff base bio-electrode as sensitive sensor for ibuprofen in environmentally contaminant water

Elnouby,

Zahran,

Younes

2024

J Mater Sci: Mater Electron

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One of the most effective oral antipyretics and analgesics, ibuprofen (IBP) is a primary ingredient in hospital wastewater because it is widely used to treat both acute and chronic pain. It is important to detect its concentration in the wastewater. Bio-electrochemical sensor is a promising detection method due to its durability and accuracy. Schiffbase is an advanced electrode materials for bio-electrochemical sensor. Which able to detect (IBP) concentration in wastewater.2,3dihydroxy-N'1-((E)-2-hydroxybenzylidene)-N'4-((Z)-2-hydroxybenzylidene (Schiffbase) materials have been synthesized and characterized.IR spectroscopy data identified (OH/H2O), ʋ (H-bonding), ʋ (C = O), ʋ (COH), ʋ (C = N) function groups. The SEM images of Schiff base presented needle-like shape with regular morphology. Electrochemical electrode have been fabricated from Schiffbase materials. IBP detected electrochemically by CV, DPV, and EIS methods, sensing rate of (2E−7 A/mgL−1) with coefficient of determination was (R2 = 0.999), into two steps sensing mechanism, which correspond to the ion diffusion process, respectively. Schiffbase electrodes shows superior sensitivity for low concentration of IBP (~ 2 mg/L). Sensing mechanism proposed upon electrochemical results.

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Self-assembly of simple Schiff base ligand into unique saddle-type [4x4] tetranuclear architecture and its application as selective voltammetric dopamine sensor in aqueous conditions

Cited by 4 publications

References 38 publications

Copper(II)-Tannic Acid@Cu with In Situ Grown Gold Nanoparticles as a Bifunctional Matrix for Facile Construction of Label-Free and Ultrasensitive Electrochemical cTnI Immunosensor

Copper(II)-Tannic Acid@Cu with In Situ Grown Gold Nanoparticles as a Bifunctional Matrix for Facile Construction of Label-Free and Ultrasensitive Electrochemical cTnI Immunosensor

Black Phosphorus Quantum Dots with Exposed (113) Planes on Chemiluminescent Luminol–K₃Fe(CN)₆ for Detection of Dopamine

Advanced Schiff base bio-electrode as sensitive sensor for ibuprofen in environmentally contaminant water

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Self-assembly of simple Schiff base ligand into unique saddle-type [4x4] tetranuclear architecture and its application as selective voltammetric dopamine sensor in aqueous conditions

Cited by 4 publications

References 38 publications

Copper(II)-Tannic Acid@Cu with In Situ Grown Gold Nanoparticles as a Bifunctional Matrix for Facile Construction of Label-Free and Ultrasensitive Electrochemical cTnI Immunosensor

Copper(II)-Tannic Acid@Cu with In Situ Grown Gold Nanoparticles as a Bifunctional Matrix for Facile Construction of Label-Free and Ultrasensitive Electrochemical cTnI Immunosensor

Black Phosphorus Quantum Dots with Exposed (113) Planes on Chemiluminescent Luminol–K3Fe(CN)6 for Detection of Dopamine

Advanced Schiff base bio-electrode as sensitive sensor for ibuprofen in environmentally contaminant water

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Black Phosphorus Quantum Dots with Exposed (113) Planes on Chemiluminescent Luminol–K₃Fe(CN)₆ for Detection of Dopamine