1
|
Islam GJ, Arrigan DWM. Electrochemical behaviour of poly(amidoamine) dendrimers at micropipette-based liquid/liquid micro-interfaces. Talanta 2024; 280:126598. [PMID: 39146869 DOI: 10.1016/j.talanta.2024.126598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 07/16/2024] [Accepted: 07/19/2024] [Indexed: 08/17/2024]
Abstract
Dendrimers are macromolecules with well-defined three-dimensional structures, sizes and surface charges. In this work, four generations of poly(amidoamine) (PAMAM) dendrimers were investigated at the micro-interface between two immiscible electrolyte solutions (μITIES) to understand their electrochemical responses as simple models of ionised macromolecules. Cyclic voltammetry (CV) across a range of aqueous phase pH revealed that all four generations (G0-G3) presented diffusion-controlled ion-transfer from aqueous to organic phase, while the reverse transfers from organic to aqueous phase varied with both pH and the dendrimer generation. The larger dendrimers (G2 and G3) show an adsorption behaviour at pH ≤ 3.5, but show a diffusional response at pH ≥ 6. On the other hand, the smaller dendrimers (G0 and G1) always show a diffusional response and are not impacted by the pH. This indicates that more highly charged dendrimers condense at the interface. The reverse scan of CVs showed that an increased applied potential was required to remove (desorb) these polycations from the interfaces in comparison to smaller, less charged species. Diffusion coefficients (D) were estimated, showing a decrease with increasing generation. Limits of detection for these dendrimers by CV at the μITIES were 0.4, 0.2, 0.7 and 0.5 μM for G0 to G3, respectively, while differential pulse voltammetry lowered the LODs (0.07, 0.05, 0.09 and 0.08 μM, respectively). These study shows that the μITIES provides a simple way to detect and evaluate the electrochemical behaviour of ionised macromolecules, providing a simple illustration of detection mechanism with diffusion or adsorption processes.
Collapse
Affiliation(s)
- Gazi Jahirul Islam
- School of Molecular and Life Sciences, Curtin University, GPO Box U1987, Perth, WA 6845, Australia; Department of Chemistry, University of Barishal, Barishal, 8254, Bangladesh
| | - Damien W M Arrigan
- School of Molecular and Life Sciences, Curtin University, GPO Box U1987, Perth, WA 6845, Australia.
| |
Collapse
|
2
|
Xu Z, You Y, Bai S, Wang L, Liu C. Microliquid/Liquid Interfacial Sensors: Biomimetic Investigation of Transmembrane Mechanisms and Real-Time Determinations of Clemastine, Cyproheptadine, Epinastine, Cetirizine, and Desloratadine. Anal Chem 2024; 96:6599-6608. [PMID: 38640514 DOI: 10.1021/acs.analchem.3c05640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2024]
Abstract
Antihistamines relieve allergic symptoms by inhibiting the action of histamine. Further understanding of antihistamine transmembrane mechanisms and optimizing the selectivity and real-time monitoring capabilities of drug sensors is necessary. In this study, a micrometer liquid/liquid (L/L) interfacial sensor has served as a biomimetic membrane to investigate the mechanism of interfacial transfer of five antihistamines, i.e., clemastine (CLE), cyproheptadine (CYP), epinastine (EPI), desloratadine (DSL), and cetirizine (CET), and realize the real-time determinations. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques have been used to uncover the electrochemical transfer behavior of the five antihistamines at the L/L interface. Additionally, finite element simulations (FEMs) have been employed to reveal the thermodynamics and kinetics of the process. Visualization of antihistamine partitioning in two phases at different pH values can be realized by ion partition diagrams (IPDs). The IPDs also reveal the transfer mechanism at the L/L interface and provide effective lipophilicity at different pH values. Real-time determinations of these antihistamines have been achieved through potentiostatic chronoamperometry (I-t), exhibiting good selectivity with the addition of nine common organic or inorganic compounds in living organisms and revealing the potential for in vivo pharmacokinetics. Besides providing a satisfactory surrogate for studying the transmembrane mechanism of antihistamines, this work also sheds light on micro- and nano L/L interfacial sensors for in vivo analysis of pharmacokinetics at a single-cell or single-organelle level.
Collapse
Affiliation(s)
- Zhidan Xu
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Yongtao You
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Silan Bai
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Lishi Wang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Cheng Liu
- Center for Advanced Analytical Science, Guangzhou Key Laboratory of Sensing Materials & Devices, Guangdong Key Laboratory for Photoelectric Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China
| |
Collapse
|
3
|
Sobczak K, Rudnicki K, Poltorak L. Electrochemical screening of selected β-blockers at a polarized liquid-liquid interface. Analyst 2024; 149:2363-2373. [PMID: 38454902 DOI: 10.1039/d3an02051g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
This paper describes the electrochemical behavior of five β-blockers at the polarized liquid-liquid interface formed between aqueous solution (sodium chloride solution or Britton-Robinson buffers) and bis(triphenylphosphoranylidene)ammonium tetrakis(4-chlorophenyl)borate (BTPPATPBCl) dissolved in 1,2-dichloroethane (the organic phase). All measurements reported in this work were conducted using cyclic voltammetry (CV). The effects of the concentration of analytes, the pH of the aqueous phase, and applied electrochemical parameters on the analytical performance of the studied system are studied and discussed. The linear dynamic ranges (LDRs) of the studied β-blockers were in the range of 5-200 μmol L-1 and the lowest limit of detection (LOD) value was determined for pindolol (LOD = 1.96 μM μmol L-1). The highest LOD value was 4.96 μmol L-1 found for nebivolol. In addition, physicochemical parameters such as the formal Galvani potential difference (Δaqorgϕ), formal Gibbs free energies of the ion transfer reaction (ΔaqorgG') and partition coefficients (log P'aq/org) for all studied molecules were determined. The latter were compared and correlated with the available literature values of log Poctanol. Finally, a standard addition method was used to determine the concentration of nebivolol in pharmaceutical preparations using a platform based on the electrified liquid-liquid interface.
Collapse
Affiliation(s)
- Karolina Sobczak
- Department of Inorganic and Analytical Chemistry, Electroanalysis and Electrochemistry Group, Faculty of Chemistry, University of Lodz, Tamka 12, 91-403 Lodz, Poland.
| | - Konrad Rudnicki
- Department of Inorganic and Analytical Chemistry, Electroanalysis and Electrochemistry Group, Faculty of Chemistry, University of Lodz, Tamka 12, 91-403 Lodz, Poland.
| | - Lukasz Poltorak
- Department of Inorganic and Analytical Chemistry, Electroanalysis and Electrochemistry Group, Faculty of Chemistry, University of Lodz, Tamka 12, 91-403 Lodz, Poland.
| |
Collapse
|
4
|
Silwane B, Wilson M, Kataky R. An Electrochemistry and Computational Study at an Electrified Liquid-Liquid Interface for Studying Beta-Amyloid Aggregation. MEMBRANES 2023; 13:584. [PMID: 37367788 DOI: 10.3390/membranes13060584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 05/22/2023] [Accepted: 05/29/2023] [Indexed: 06/28/2023]
Abstract
Amphiphilic peptides, such as Aß amyloids, can adsorb at an interface between two immiscible electrolyte solutions (ITIES). Based on previous work (vide infra), a hydrophilic/hydrophobic interface is used as a simple biomimetic system for studying drug interactions. The ITIES provides a 2D interface to study ion-transfer processes associated with aggregation, as a function of Galvani potential difference. Here, the aggregation/complexation behaviour of Aβ(1-42) is studied in the presence of Cu (II) ions, together with the effect of a multifunctional peptidomimetic inhibitor (P6). Cyclic and differential pulse voltammetry proved to be particularly sensitive to the detection of the complexation and aggregation of Aβ(1-42), enabling estimations of changes in lipophilicity upon binding to Cu (II) and P6. At a 1:1 ratio of Cu (II):Aβ(1-42), fresh samples showed a single DPV (Differential Pulse Voltammetry) peak half wave transfer potential (E1/2) at 0.40 V. Upon increasing the ratio of Cu (II) two-fold, fluctuations were observed in the DPVs, indicating aggregation. The approximate stoichiometry and binding properties of Aβ(1-42) during complexation with Cu (II) were determined by performing a differential pulse voltammetry (DPV) standard addition method, which showed two binding regimes. A pKa of 8.1 was estimated, with a Cu:Aβ1-42 ratio~1:1.7. Studies using molecular dynamics simulations of peptides at the ITIES show that Aβ(1-42) strands interact through the formation of β-sheet stabilised structures. In the absence of copper, binding/unbinding is dynamic, and interactions are relatively weak, leading to the observation of parallel and anti-parallel arrangements of β-sheet stabilised aggregates. In the presence of copper ions, strong binding occurs between a copper ion and histidine residues on two peptides. This provides a convenient geometry for inducing favourable interactions between folded β-sheet structures. Circular Dichroism spectroscopy (CD spectroscopy) was used to support the aggregation behaviour of the Aβ(1-42) peptides following the addition of Cu (II) and P6 to the aqueous phase.
Collapse
Affiliation(s)
- Bongiwe Silwane
- Department of Chemistry, Durham University, Durham DH1 3LE, UK
| | - Mark Wilson
- Department of Chemistry, Durham University, Durham DH1 3LE, UK
| | - Ritu Kataky
- Department of Chemistry, Durham University, Durham DH1 3LE, UK
| |
Collapse
|
5
|
Huo Q, Zhou J, Tang H, Wu W, Hu S, Dong E, Huang Y, Zhou Y, Gao Y, Bai Y, Liu D. Nanoparticle surface decoration mediated efficient protein and peptide co-encapsulation with precise ratiometric control for self-regulated drug release. NANOSCALE 2023; 15:5063-5073. [PMID: 36807439 DOI: 10.1039/d2nr05744a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Accuratly controlling drug release from a smart "self-regulated" drug delivery system is still an ongoing challenge. Herein, we developed a surface decoration strategy to achieve an efficient drug encapsulation with precise ratiometric control. Thanks to the surface decoration with cationic carrier materials by electrostatic attraction, the surface properties of different protein and peptide nanoparticles were uniformed to those adsorbed carrier materials. These carrier materials endowed protein and peptide nanoparticles with good dispersity in the oil phase and significantly inhibited the drug transfer from oil to water. With uniform surface properties, we realized the co-encapsulation of multiple types of proteins and peptides with precise ratiometric control. The encapsulation efficiency was higher than 87.8% for insulin. After solidification, the adsorbed materials on the surface of nanoparticles formed a solid protection layer, which prolonged the mean residence time of insulin from 3.3 ± 0.1 h (for insulin solution) to 47.5 ± 1.3 h. In type 1 diabetes, the spermine-modified acetalated dextran microparticle co-loaded with insulin, glucose oxidase and catalase maintained the blood glucose level within the normal range for 7 days.
Collapse
Affiliation(s)
- Qingqing Huo
- State Key Laboratory of Natural Medicines, Department of Pharmaceutical Science, China Pharmaceutical University, Nanjing 210009, China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, China
| | - Jun Zhou
- State Key Laboratory of Natural Medicines, Department of Pharmaceutical Science, China Pharmaceutical University, Nanjing 210009, China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, China
| | - Hui Tang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutical Science, China Pharmaceutical University, Nanjing 210009, China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, China
| | - Wenbo Wu
- State Key Laboratory of Natural Medicines, Department of Pharmaceutical Science, China Pharmaceutical University, Nanjing 210009, China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, China
| | - Shuai Hu
- State Key Laboratory of Natural Medicines, Department of Pharmaceutical Science, China Pharmaceutical University, Nanjing 210009, China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, China
| | - Enpeng Dong
- State Key Laboratory of Natural Medicines, Department of Pharmaceutical Science, China Pharmaceutical University, Nanjing 210009, China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, China
| | - Yang Huang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutical Science, China Pharmaceutical University, Nanjing 210009, China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, China
| | - Yunyi Zhou
- State Key Laboratory of Natural Medicines, Department of Pharmaceutical Science, China Pharmaceutical University, Nanjing 210009, China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, China
| | - Yue Gao
- State Key Laboratory of Natural Medicines, Department of Pharmaceutical Science, China Pharmaceutical University, Nanjing 210009, China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, China
| | - Yuancheng Bai
- State Key Laboratory of Natural Medicines, Department of Pharmaceutical Science, China Pharmaceutical University, Nanjing 210009, China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, China
| | - Dongfei Liu
- State Key Laboratory of Natural Medicines, Department of Pharmaceutical Science, China Pharmaceutical University, Nanjing 210009, China.
- NMPA Key Laboratory for Research and Evaluation of Pharmaceutical Preparations and Excipients, China Pharmaceutical University, Nanjing 210009, China
| |
Collapse
|
6
|
Jetmore HD, Anupriya ES, Cress TJ, Shen M. Interface between Two Immiscible Electrolyte Solutions Electrodes for Chemical Analysis. Anal Chem 2022; 94:16519-16527. [DOI: 10.1021/acs.analchem.2c01416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Henry David Jetmore
- University of Illinois at Urbana−Champaign, Urbana, Illinois61801, United States
| | | | - Tanner Joe Cress
- University of Illinois at Urbana−Champaign, Urbana, Illinois61801, United States
| | - Mei Shen
- University of Illinois at Urbana−Champaign, Urbana, Illinois61801, United States
| |
Collapse
|
7
|
You Y, Bai S, Ma Y, Liu C, Wang L. A Nanopipette Supported Oil/Water Interface Sensor for the Kinetics Analysis and Determination of Phenothiazine Derivatives. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
8
|
|
9
|
Viada BN, García MC, Yudi LM. Interfacial behaviour and quantitative analysis of hexadecyl phosphocholine drug at a polarized liquid/liquid interface. Analyst 2021; 147:109-119. [PMID: 34847570 DOI: 10.1039/d1an01641e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The interfacial behaviour of the amphiphilic drug hexadecyl phosphocholine (HePC, also called miltefosine) was analysed by cyclic voltammetry applied at the water/1,2-dichloroethane interface. HePC is the only oral drug currently approved for the treatment of visceral, mucosal and cutaneous leishmaniasis. Because of its amphiphilic character, it can interact with biological membranes, solubilizing their compounds and leading to cell disruption. These interactions are responsible for its side effects and toxicity; therefore, HePC quantification in biological fluids and pharmaceutical preparations is extremely important. However, the lack of a chromophore in its structure prevents its spectroscopic determination. For this reason, the main challenge of this work was to propose an electroanalytical method for the quantification of this drug, which constitutes a simpler alternative than liquid chromatography-tandem mass spectrometry already reported. With this aim, in the first part of this work, the mechanism of the electrochemical process occurring after polarizing the interface was studied. By varying the experimental conditions, it was possible to determine that in a first step, at open circuit or at low potential values, HePC spontaneously adsorbed to the interface. Later, as the potential increased, the transfer of the anions present in the organic phase towards the aqueous side of the interface, where the HePC polar head groups were present, occurred thus forming adsorbed "ion pairs" and producing an increase in positive current. Subsequently, in the negative sweep, the "ion pairs" dissociated and desorbed giving rise to a negative peak. In this way, both negative and positive currents were considered useful for quantitative purposes. In the second part of this work, an appropriate experimental procedure was designed and proposed as a quantitative methodology for the HePC determination, which consisted of cleaning the interface and controlling the time at open circuit, followed by the voltammetric analysis. A linear response of both, positive or negative, peak currents with drug concentration was obtained within an acceptable range, providing a simple solution for the HePC quantification problem. Future studies will be carried out to evaluate the quantification and selectivity in real matrices containing polymer micelles working as HePC nanocarriers with the aim of avoiding the adverse effects of HePC when it is orally or intravenously administered.
Collapse
Affiliation(s)
- Benjamín Nahuel Viada
- Universidad Nacional de Córdoba, Facultad de Ciencias Químicas, Departamento de Fisicoquímica, Córdoba, Argentina. .,Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Instituto de Investigaciones en Fisicoquímica de Córdoba, INFIQC, Córdoba, Argentina
| | - Mónica Cristina García
- Universidad Nacional de Córdoba. Facultad de Ciencias Químicas, Departamento de Ciencias Farmacéuticas, Córdoba, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Unidad de Investigación y Desarrollo en Tecnología Farmacéutica, UNITEFA, Córdoba, Argentina
| | - Lidia Mabel Yudi
- Universidad Nacional de Córdoba, Facultad de Ciencias Químicas, Departamento de Fisicoquímica, Córdoba, Argentina. .,Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Instituto de Investigaciones en Fisicoquímica de Córdoba, INFIQC, Córdoba, Argentina
| |
Collapse
|
10
|
Lamichhane HB, Henares TG, Hackett MJ, Arrigan DWM. Structural Changes in Insulin at a Soft Electrochemical Interface. Anal Chem 2021; 93:9094-9102. [PMID: 34152129 DOI: 10.1021/acs.analchem.1c00657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Understanding the interaction of proteins at interfaces, which occurs at or within cell membranes and lipoprotein vesicles, is central to our understanding of protein function. Therefore, new experimental approaches to understand how protein structure is influenced by protein-interface interactions are important. Herein we build on our previous work exploring electrochemistry at the interface between two immiscible electrolyte solutions (ITIES) to investigate changes in protein secondary structure that are modulated by protein-interface interactions. The ITIES provides an experimental framework to drive protein adsorption at an interface, allowing subsequent spectroscopic analysis (e.g., Fourier transform infrared spectroscopy) to monitor changes in protein structure. Here, we reveal that the interaction between insulin and the interface destabilizes native insulin secondary structure, promoting formation of α helix secondary structures. These structural alterations result from protein-interface rather than protein-protein interactions at the interface. Although this is an emerging approach, our results provide a foundation highlighting the value of the ITIES as a tool to study protein structure and interactions at interfaces. Such knowledge may be useful to elucidate protein function within biological systems or to aid sensor development.
Collapse
|
11
|
Sudalaimani S, Sanjeev Kumar K, Esokkiya A, Suresh C, Giribabu K. Electrified liquid-liquid interface as an electrochemical tool for the sensing of putrescine and cadaverine. Analyst 2021; 146:3208-3215. [PMID: 33999050 DOI: 10.1039/d1an00019e] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Putrescine and cadaverine are biogenic amines that serve as potential biomarkers for several types of cancers and monitoring food quality. Electrochemical sensing of putrescine and cadaverine by non-enzymatic routes remains a challenge because of their inertness at unmodified electrode surfaces and hence a liquid-liquid interface strategy has been employed for their detection. In the present study, electrochemical sensing of cadaverine and putrescine has been demonstrated by simple and facilitated ion-transfer processes using a liquid-liquid microinterface supported by a microcapillary. A microinterface was constructed in different configurations by varying the aqueous phase composition in the absence and presence of dibenzo-18-crown-6, and the ion-transfer ability of putrescine and cadaverine was studied in these configurations. A peak shaped voltammogram was observed in the backward scan, due to the linear diffusion of putrescine and cadaverine from the organic to the aqueous phase. The detection ability in the presence of dibenzo-18-crown-6 was observed in the concentration ranges of 0.25-25 μM and 0.25-40 μM for putrescine and cadaverine with detection limits of 0.11 and 0.17 μM respectively. In the presence of dibenzo-18-crown-6, the electrochemical sensing of putrescine and cadaverine was more pronounced compared to the simple ion-transfer process.
Collapse
Affiliation(s)
- S Sudalaimani
- Electrodics and Electrocatalysis Division, CSIR-Central Electrochemical Research Institute, Karaikudi-630 003, Tamil Nadu, India.
| | | | | | | | | |
Collapse
|
12
|
Gamero-Quijano A, Dossot M, Walcarius A, Scanlon MD, Herzog G. Electrogeneration of a Free-Standing Cytochrome c-Silica Matrix at a Soft Electrified Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:4033-4041. [PMID: 33761740 PMCID: PMC8562870 DOI: 10.1021/acs.langmuir.1c00409] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/16/2021] [Indexed: 06/12/2023]
Abstract
Interactions of a protein with a solid-liquid or a liquid-liquid interface may destabilize its conformation and hence result in a loss of biological activity. We propose here a method for the immobilization of proteins at an electrified liquid-liquid interface. Cytochrome c (Cyt c) is encapsulated in a silica matrix through an electrochemical process at an electrified liquid-liquid interface. Silica condensation is triggered by the interfacial transfer of cationic surfactant, cetyltrimethylammonium, at the lower end of the interfacial potential window. Cyt c is then adsorbed on the previously electrodeposited silica layer, when the interfacial potential, Δowϕ, is at the positive end of the potential window. By cycling of the potential window back and forth, silica electrodeposition and Cyt c adsorption occur sequentially as demonstrated by in situ UV-vis absorbance spectroscopy. After collection from the liquid-liquid interface, the Cyt c-silica matrix is characterized ex situ by UV-vis diffuse reflectance spectroscopy, confocal Raman microscopy, and fluorescence microscopy, showing that the protein maintained its tertiary structure during the encapsulation process. The absence of denaturation is further confirmed in situ by the absence of electrocatalytic activity toward O2 (observed in the case of Cyt c denaturation). This method of protein encapsulation may be used for other proteins (e.g., Fe-S cluster oxidoreductases, copper-containing reductases, pyrroloquinoline quinone-containing enzymes, or flavoproteins) in the development of biphasic bioelectrosynthesis or bioelectrocatalysis applications.
Collapse
Affiliation(s)
- Alonso Gamero-Quijano
- The
Bernal Institute and Department of Chemical Sciences, School of Natural
Sciences, University of Limerick (UL), Limerick V94 T9PX, Ireland
| | - Manuel Dossot
- Université
de Lorraine, CNRS, LCPME, F-54000 Nancy, France
| | | | - Micheál D. Scanlon
- The
Bernal Institute and Department of Chemical Sciences, School of Natural
Sciences, University of Limerick (UL), Limerick V94 T9PX, Ireland
| | | |
Collapse
|
13
|
Kowalewska K, Rodriguez-Prieto T, Skrzypek S, Cano J, Ramírez RG, Poltorak L. Electroanalytical study of five carbosilane dendrimers at the interface between two immiscible electrolyte solutions. Analyst 2021; 146:1376-1385. [PMID: 33403382 DOI: 10.1039/d0an02101f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
This work is focused on the electroanalytical study of a family of five imidazolium-terminated carbosilane dendrimers (from generation G1 to G3) at the polarized liquid-liquid interface formed between water and 1,2-dichloroethane solutions. All dendrimers with permanently and positively charged imidazolium groups located at the periphery within the branched carbosilane core were found to be electrochemically active. Based on the concentration and scan rate dependencies we have concluded that these molecules undergo interfacial ion transfer processes accompanied by interfacial adsorption/desorption rather than the electrochemically induced interfacial formation of the macromolecule-anion (tetrakis(4-chlorophenyl)borate) from the organic phase complex. Also, we report several physicochemical and electroanalytical parameters (e.g. diffusion coefficients, LODs, and detection sensitivities) for the studied family of dendrimers. Our work aims to contribute to the understating of the interaction between branched macromolecules and biomimetic interfaces.
Collapse
Affiliation(s)
- Karolina Kowalewska
- Department of Inorganic and Analytical Chemistry, Electroanalysis and Electrochemistry Group, Faculty of Chemistry, University of Lodz, Tamka 12, 91-403 Lodz, Poland.
| | | | | | | | | | | |
Collapse
|
14
|
Zannah S, W M Arrigan D. Electrochemistry of catalase at a liquid|liquid micro-interface array. Bioelectrochemistry 2020; 138:107694. [PMID: 33333457 DOI: 10.1016/j.bioelechem.2020.107694] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 10/28/2020] [Accepted: 11/01/2020] [Indexed: 01/18/2023]
Abstract
The electrochemistry of catalase (CAT) was investigated at the interface between two immiscible electrolyte solutions (ITIES) as a step towards its detection. Electrochemistry at the ITIES offers advantages such as the non-redox detection of biomolecules. The electrochemical behaviour of CAT at the ITIES, in a micro-interface array format, displayed a distinct cyclic voltammogram when the aqueous phase pH was lower than the isoelectric point (pI) of CAT. No voltammetric response was observed when the aqueous phase pH > pI of CAT, indicating that neutral or negatively charged CAT has no capability to facilitate anion transfer from the organic phase. Adsorptive stripping voltammetry (AdSV) was assessed for detection of low concentrations at the µITIES array. Application of a positive preconcentration potential for a fixed time enabled interfacial accumulation of CAT as a complex; subsequently, a voltammetric scan to lower potentials desorbed the complex, providing the electroanalytical signal. Assessment of sample matrix effects by examining the electrochemistry of CAT in artificial serum indicated that detection in pH-adjusted samples is feasible. Together, these results demonstrate that CAT is electroactive at the liquid-liquid interface and this may be useful as a strategy to detect and characterize the enzyme in a label-free manner.
Collapse
Affiliation(s)
- Shaheda Zannah
- Curtin Institute for Functional Molecules and Interfaces, School of Molecular and Life Sciences, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia
| | - Damien W M Arrigan
- Curtin Institute for Functional Molecules and Interfaces, School of Molecular and Life Sciences, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia.
| |
Collapse
|
15
|
Zalka D, Péter L. On the evolution and application of the concept of electrochemical polarization. J Solid State Electrochem 2020. [DOI: 10.1007/s10008-020-04682-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
AbstractThis paper yields an overview on the evolution of the concept of polarization applied to electrochemical systems, ranging from electrodes to cells. The historical discussion starts at the early phase of the development of electrochemistry when current-controlled measurements were possible only, and when the early definitions of polarization, depolarization and depolarizer were created. A number of contemporary handbooks, recommendations and other reference resources are listed in which these concepts are represented in various ways, from conservative definitions to attempts of redefining them. The traditional definitions are confronted with the everyday use of professional language, drawing attention to the fact that the widespread application of potential-controlled electrochemical measurements led to new meanings. Some suggestions are made that open room for the application of the term of polarization in accord with the modern methodologies, without compromising the traditional introduction of the term. Polarization-related phenomena in biological membranes are not dealt with in the present work.
Collapse
|
16
|
Zhan Z, Zhang H, Niu X, Yu X, Sun H, Sha X, Zhao Y, Wang Y, Li WJ. Microliter Sample Insulin Detection Using a Screen-Printed Electrode Modified by Nickel Hydroxide. ACS OMEGA 2020; 5:6169-6176. [PMID: 32226901 PMCID: PMC7098017 DOI: 10.1021/acsomega.0c00194] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 02/28/2020] [Indexed: 05/03/2023]
Abstract
The monitoring of insulin, which is the only hormone that helps regulate blood glucose levels in the body, plays a key role in the diagnosis and treatment of diabetes. However, most techniques today involve complicated electrode fabrication and testing processes, which are time-consuming and costly, and require a relatively large volume of sample. To overcome these drawbacks, we present here a low-cost insulin detection method based on a screen-printed electrode (SPE) modified by nickel hydroxide (Ni(OH)2). This novel method only requires 300 μL of insulin sample, and the time it takes for electrode preparation is about 12 times shorter than traditional electrode fabrication methods such as coating and sol-gel methods. The electrochemical behaviors of the Ni(OH)2-coated SPE (NSPE) sensing area in insulin aqueous solutions are studied using cyclic voltammetry, amperometric i-t curves, and electrochemical impedance spectroscopy. The results demonstrate that the NSPE sensing surface has excellent detection properties, such as a high sensitivity of 15.3 μA·μM-1 and a low detection limit of 138 nM. It takes a short time (∼10 min) to prepare the NSPE sensing surface, and only two drops (∼300 μL) of insulin samples are required in the detection process. Moreover, the selectivity of this method for insulin detection is verified by detecting mixtures of insulin and ascorbic acid or bovine hemoglobin. Finally, we discuss the potential clinical applications of this method by detecting various concentrations of insulin in human serum.
Collapse
Affiliation(s)
- Zhikun Zhan
- Key
Laboratory of Intelligent Rehabilitation and Neromodulation of Hebei
Province, Yanshan University at Qinhuangdao, Qinhuangdao 066004, China
| | - Hongyu Zhang
- Key
Laboratory of Intelligent Rehabilitation and Neromodulation of Hebei
Province, Yanshan University at Qinhuangdao, Qinhuangdao 066004, China
| | - Xuanyu Niu
- School
of Control Engineering, Northeastern University
at Qinhuangdao, Qinhuangdao 066004, China
| | - Xiaodong Yu
- School
of Control Engineering, Northeastern University
at Qinhuangdao, Qinhuangdao 066004, China
| | - Hui Sun
- School
of Control Engineering, Northeastern University
at Qinhuangdao, Qinhuangdao 066004, China
| | - Xiaopeng Sha
- School
of Control Engineering, Northeastern University
at Qinhuangdao, Qinhuangdao 066004, China
| | - Yuliang Zhao
- School
of Control Engineering, Northeastern University
at Qinhuangdao, Qinhuangdao 066004, China
- E-mail: (Y.Z.)
| | - Ying Wang
- School
of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China
- Beijing
Advanced Innovation Centre for Biomedical Engineering, Beihang University, Beijing 100191, China
| | - Wen Jung Li
- Department
of Mechanical and Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong 999077, China
- E-mail: (W.J.L.)
| |
Collapse
|
17
|
Arooj M, Arrigan DWM, Mancera RL. Characterization of Protein-Facilitated Ion-Transfer Mechanism at a Polarized Aqueous/Organic Interface. J Phys Chem B 2019; 123:7436-7444. [PMID: 31379167 DOI: 10.1021/acs.jpcb.9b04746] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Protein electrochemistry studies at a polarized interface between two immiscible electrolyte solutions (ITIES) indicate that the detection mechanism of a protein at the interface involves a combination of protein-anion complexation and interfacial adsorption processes. A detailed characterization of the protein-facilitated mechanism of ion transfer at the ITIES will allow the development of new label-free biomolecular detection tools. Molecular dynamics simulations were performed to describe the mechanism of transfer of the hydrophobic anion tetraphenylborate (TPB-) from a 1,2-dichloroethane (organic) phase to an aqueous phase mediated by lysozyme as a model protein under the action of an external electric field. The anion migrated to the protein at the interface and formed multiple contacts. The side chains of positively charged Lys and Arg residues formed electrostatic interactions with the anion. Nonpolar residues like Trp, Met, and Val formed hydrophobic contacts with the anion as it moved along the protein surface. During this process, lysozyme adopted multiple, partially unfolded conformations at the interface, all involving various anion-protein complexes with small free-energy barriers between them. The general mechanism of protein-facilitated ion transfer at a polarized liquid-liquid interface thus likely involves the movement of a hydrophobic anion along the protein surface through a combination of electrostatic and hydrophobic interactions.
Collapse
Affiliation(s)
- Mahreen Arooj
- Department of Chemistry, College of Sciences , University of Sharjah , Sharjah 27272 , United Arab Emirates
| | | | | |
Collapse
|
18
|
Booth SG, Felisilda BMB, Alvarez de Eulate E, Gustafsson OJR, Arooj M, Mancera RL, Dryfe RAW, Hackett MJ, Arrigan DWM. Secondary Structural Changes in Proteins as a Result of Electroadsorption at Aqueous-Organogel Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:5821-5829. [PMID: 30955327 DOI: 10.1021/acs.langmuir.8b04227] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The electroadsorption of proteins at aqueous-organic interfaces offers the possibility to examine protein structural rearrangements upon interaction with lipophilic phases, without modifying the bulk protein or relying on a solid support. The aqueous-organic interface has already provided a simple means of electrochemical protein detection, often involving adsorption and ion complexation; however, little is yet known about the protein structure at these electrified interfaces. This work focuses on the interaction between proteins and an electrified aqueous-organic interface via controlled protein electroadsorption. Four proteins known to be electroactive at such interfaces were studied: lysozyme, myoglobin, cytochrome c, and hemoglobin. Following controlled protein electroadsorption onto the interface, ex situ structural characterization of the proteins by FTIR spectroscopy was undertaken, focusing on secondary structural traits within the amide I band. The structural variations observed included unfolding to form aggregated antiparallel β-sheets, where the rearrangement was specifically dependent on the interaction with the organic phase. This was supported by MALDI ToF MS measurements, which showed the formation of protein-anion complexes for three of these proteins, and molecular dynamic simulations, which modeled the structure of lysozyme at an aqueous-organic interface. On the basis of these findings, the modulation of protein secondary structure by interfacial electrochemistry opens up unique prospects to selectively modify proteins.
Collapse
Affiliation(s)
- Samuel G Booth
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL U.K
| | | | | | | | - Mahreen Arooj
- Department of Chemistry, College of Sciences , University of Sharjah , Sharjah 27272 , United Arab Emirates
| | | | - Robert A W Dryfe
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL U.K
| | | | | |
Collapse
|
19
|
Abstract
Good glucose management through an insulin dose regime based on the metabolism of glucose helps millions of people worldwide manage their diabetes. Since Banting and Best extracted insulin, glucose management has improved due to the introduction of insulin analogues that act from 30 minutes to 28 days, improved insulin dose regimes, and portable glucose meters, with a current focus on alternative sampling sites that are less invasive. However, a piece of the puzzle is still missing-the ability to measure insulin directly in a Point-of-Care device. The ability to measure both glucose and insulin concurrently will enable better glucose control by providing an improved estimate for insulin sensitivity, minimizing variability in control, and maximizing safety from hypoglycaemia. However, direct detection of free insulin has provided a challenge due to the size of the molecule, the low concentration of insulin in blood, and the selectivity against interferants in blood. This review summarizes current insulin detection methods from immunoassays to analytical chemistry, and sensors. We also discuss the challenges and potential of each of the methods towards Point-of-Care insulin detection.
Collapse
|
20
|
Jeshycka S, Kim EM, Lee HJ. Electrochemical investigation on ionizable levofloxacin transfer reaction across liquid/liquid interfaces and potential applications to milk analysis. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.07.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
21
|
Sakae H, Toda Y, Yokoyama T. Electrochemical behavior of ferritin at the polarized water|1,2-dichloroethane interface. Electrochem commun 2018. [DOI: 10.1016/j.elecom.2018.04.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
|
22
|
Jeshycka S, Han HY, Lee HJ. Voltammetric Understanding of Ionizable Doxorubicin Transfer Reactions across Liquid/liquid Interfaces and Sensor Development. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.05.096] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
23
|
Xie L, Huang X, Su B. Portable Sensor for the Detection of Choline and Its Derivatives Based on Silica Isoporous Membrane and Gellified Nanointerfaces. ACS Sens 2017; 2:803-809. [PMID: 28723110 DOI: 10.1021/acssensors.7b00166] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A portable amperometric ion sensor was fabricated by integrating silica isoporous membrane (SIM) and organogel composed of polyvinyl chloride and 1,2-dichloroethane (PVC-DCE) on a 3D-printed polymer chip. The detection of ionic species in aqueous samples could be accomplished by adding a microliter of sample droplet to the sensor and by identifying the ion-transfer potential and current magnitude at the water/organogel interface array templated by SIM. Thanks to the ultrasmall channel size (2-3 nm in diameter), high channel density (4 × 108 μm-2), and ultrathin thickness (80 nm) of SIM, the ensemble of nanoscopic water/organogel (nano-W/Gel) interface array behaved like a microinterface with two back-to-back hemispherical mass diffusion zones. So, the heterogeneous ion-transfer across the nano-W/Gel interface array generated a steady-state sigmoidal current wave. The detection of choline (Ch) and its derivatives, including acetylcholine (ACh), benzoylcholine (BCh), and atropine (AP), in aqueous samples was examined with this portable sensor. Using differential pulse stripping voltammetry (DPSV), the quantification of these analytes was achieved with a limit of detection (LOD) down to 1 μM. Moreover, the portable ion sensor was insensitive to various potential interferents that might coexist in vivo, owing to size-/charge-based selectivity and antifouling capacity of SIM. With this priority, the portable ion sensor was able to quantitatively determine Ch and its derivatives in diluted urine and blood samples. The LODs for Ch, ACh, AP, and BCh in urine were 1.12, 1.30, 1.08, and 0.99 μM, and those for blood samples were 3.61, 3.38, 2.32, and 1.81 μM, respectively.
Collapse
Affiliation(s)
- Lisiqi Xie
- Institute of Analytical Chemistry,
Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Xiao Huang
- Institute of Analytical Chemistry,
Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Bin Su
- Institute of Analytical Chemistry,
Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| |
Collapse
|
24
|
Noorbakhsh A, Alnajar AIK. Antifouling properties of reduced graphene oxide nanosheets for highly sensitive determination of insulin. Microchem J 2016. [DOI: 10.1016/j.microc.2016.06.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
25
|
Arooj M, Gandhi NS, Kreck CA, Arrigan DWM, Mancera RL. Adsorption and Unfolding of Lysozyme at a Polarized Aqueous–Organic Liquid Interface. J Phys Chem B 2016; 120:3100-12. [DOI: 10.1021/acs.jpcb.6b00536] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mahreen Arooj
- School of Biomedical Sciences, CHIRI Biosciences and Curtin Institute
for Computation, ‡Department of Chemistry and Nanochemistry Research Institute, Curtin University, GPO
Box U1987, Perth, WA 6845, Australia
| | - Neha S. Gandhi
- School of Biomedical Sciences, CHIRI Biosciences and Curtin Institute
for Computation, ‡Department of Chemistry and Nanochemistry Research Institute, Curtin University, GPO
Box U1987, Perth, WA 6845, Australia
| | - Cara A. Kreck
- School of Biomedical Sciences, CHIRI Biosciences and Curtin Institute
for Computation, ‡Department of Chemistry and Nanochemistry Research Institute, Curtin University, GPO
Box U1987, Perth, WA 6845, Australia
| | - Damien W. M. Arrigan
- School of Biomedical Sciences, CHIRI Biosciences and Curtin Institute
for Computation, ‡Department of Chemistry and Nanochemistry Research Institute, Curtin University, GPO
Box U1987, Perth, WA 6845, Australia
| | - Ricardo L. Mancera
- School of Biomedical Sciences, CHIRI Biosciences and Curtin Institute
for Computation, ‡Department of Chemistry and Nanochemistry Research Institute, Curtin University, GPO
Box U1987, Perth, WA 6845, Australia
| |
Collapse
|
26
|
Arrigan DWM, Alvarez de Eulate E, Liu Y. Electroanalytical Opportunities Derived from Ion Transfer at Interfaces between Immiscible Electrolyte Solutions. Aust J Chem 2016. [DOI: 10.1071/ch15796] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This review presents an introduction to electrochemistry at interfaces between immiscible electrolyte solutions and surveys recent studies of this form of electrochemistry in electroanalytical strategies. Simple ion and facilitated ion transfers across interfaces varying from millimetre scale to nanometre scales are considered. Target detection strategies for a range of ions, inorganic, organic, and biological, including macromolecules, are discussed.
Collapse
|
27
|
Lee HJ, Arrigan DWM, Karim MN, Kim H. Amperometric Ion Sensing Approaches at Liquid/Liquid Interfaces for Inorganic, Organic and Biological Ions. ELECTROCHEMICAL STRATEGIES IN DETECTION SCIENCE 2015. [DOI: 10.1039/9781782622529-00296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Electrochemistry at the interface between two immiscible electrolyte solutions (ITIES) has become an invaluable tool for the selective and sensitive detection of cationic and anionic species, including charged drug molecules and proteins. In addition, neutral molecules can also be detected at the ITIES via enzymatic reactions. This chapter highlights recent developments towards creating a wide spectrum of sensing platforms involving ion transfer across the ITIES. As well as outlining the basic principles needed for performing these sensing applications, the development of ITIES-based detection strategies for inorganic, organic, and biological ions is discussed.
Collapse
Affiliation(s)
- Hye Jin Lee
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University 80 Daehakro, Buk-gu Daegu-city 702-701 Republic of Korea
| | - Damien W. M. Arrigan
- Nanochemistry Research Institute, Department of Chemistry, Curtin University GPO Box U1987 Perth, Western Australia 6845 Australia
| | - Md. Nurul Karim
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University 80 Daehakro, Buk-gu Daegu-city 702-701 Republic of Korea
| | - Hyerim Kim
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University 80 Daehakro, Buk-gu Daegu-city 702-701 Republic of Korea
| |
Collapse
|
28
|
Investigation of a solvent-cast organogel to form a liquid-gel microinterface array for electrochemical detection of lysozyme. Anal Chim Acta 2015; 893:34-40. [DOI: 10.1016/j.aca.2015.08.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 08/11/2015] [Accepted: 08/15/2015] [Indexed: 11/21/2022]
|
29
|
Mirceski V, Mitrova B, Ivanovski V, Mitreska N, Aleksovska A, Gulaboski R. Studying the ion transfer across liquid interface of thin organic-film-modified electrodes in the presence of glucose oxidase. J Solid State Electrochem 2015. [DOI: 10.1007/s10008-015-2863-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
30
|
Rutkowska A, Freedman K, Skalkowska J, Kim MJ, Edel JB, Albrecht T. Electrodeposition and Bipolar Effects in Metallized Nanopores and Their Use in the Detection of Insulin. Anal Chem 2015; 87:2337-44. [DOI: 10.1021/ac504463r] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Agnieszka Rutkowska
- Department
of Chemistry, Imperial College London, South Kensington, SW7 2AZ, London, United Kingdom
| | - Kevin Freedman
- Department
of Chemistry, Imperial College London, South Kensington, SW7 2AZ, London, United Kingdom
- Department
of Chemical and Biological Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Justyna Skalkowska
- Department
of Chemistry, Imperial College London, South Kensington, SW7 2AZ, London, United Kingdom
- Department
of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - Min Jun Kim
- Department
of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Joshua B. Edel
- Department
of Chemistry, Imperial College London, South Kensington, SW7 2AZ, London, United Kingdom
| | - Tim Albrecht
- Department
of Chemistry, Imperial College London, South Kensington, SW7 2AZ, London, United Kingdom
| |
Collapse
|
31
|
Seidi S, Yamini Y, Rezazadeh M. Electrochemically assisted solid based extraction techniques: A review. Talanta 2015; 132:339-53. [DOI: 10.1016/j.talanta.2014.08.059] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 08/20/2014] [Accepted: 08/21/2014] [Indexed: 11/25/2022]
|
32
|
Riva JS, Yudi LM. The effect of the functionalization and molecular weight of cationic dextran polyelectrolytes on their electrochemical behavior at the water/1,2-dichloroethane interface. Phys Chem Chem Phys 2015; 17:1644-52. [DOI: 10.1039/c4cp03483j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The functionalization and molecular weight of cationic dextran polyelectrolytes have an impact on their adsorption and electrochemical behavior at the water/1,2-dichloroethane interface.
Collapse
Affiliation(s)
- Julieta S. Riva
- INFIQC-Instituto de Investigaciones en Fisicoquímica de Córdoba
- Consejo Nacional de Investigaciones Científicas y Técnicas
- CONICET
- Argentina and Departamento de Fisicoquímica
- Facultad de Ciencias Químicas
| | - Lidia M. Yudi
- INFIQC-Instituto de Investigaciones en Fisicoquímica de Córdoba
- Consejo Nacional de Investigaciones Científicas y Técnicas
- CONICET
- Argentina and Departamento de Fisicoquímica
- Facultad de Ciencias Químicas
| |
Collapse
|
33
|
Riva JS, Cámara CI, Juarez AV, Yudi LM. Electrochemical behaviour of cationic polyelectrolytes at a polarized liquid/liquid interface. J APPL ELECTROCHEM 2014. [DOI: 10.1007/s10800-014-0747-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
34
|
Tiwari MP, Prasad BB. An insulin monitoring device based on hyphenation between molecularly imprinted micro-solid phase extraction and complementary molecularly imprinted polymer-sensor. J Chromatogr A 2014; 1337:22-31. [DOI: 10.1016/j.chroma.2014.02.041] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Revised: 02/08/2014] [Accepted: 02/14/2014] [Indexed: 12/11/2022]
|
35
|
Determination of the substitution degree of modified chitosan by cyclic voltammetry at the water/dichloroethane interface. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.11.146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
36
|
Riva JS, Beltramo DM, Yudi LM. Adsorption–desorption mechanism of a cationic polyelectrolyte based on dimethylaminoethyl polymethacrylates at the water/1,2-dichloroethane interface. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.10.156] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
37
|
Arrigan D, Herzog G, Scanlon M, Strutwolf J. Bioanalytical Applications of Electrochemistry at Liquid-Liquid Microinterfaces. ELECTROANALYTICAL CHEMISTRY: A SERIES OF ADVANCES 2013. [DOI: 10.1201/b15576-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
38
|
Riva J, Iglesias R, Yudi L. Electrochemical adsorption of a cationic cellulosic polymer by ion pair formation at the interface between two immiscible electrolyte solutions. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.06.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
39
|
Rafiee B, Fakhari AR. Electrocatalytic oxidation and determination of insulin at nickel oxide nanoparticles-multiwalled carbon nanotube modified screen printed electrode. Biosens Bioelectron 2013; 46:130-5. [DOI: 10.1016/j.bios.2013.01.037] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Revised: 01/16/2013] [Accepted: 01/21/2013] [Indexed: 10/27/2022]
|
40
|
Alvarez de Eulate E, O'Sullivan S, Fletcher S, Newsholme P, Arrigan DWM. Ion-Transfer Electrochemistry of Rat Amylin at the Water-Organogel Microinterface Array and Its Selective Detection in a Protein Mixture. Chem Asian J 2013; 8:2096-101. [DOI: 10.1002/asia.201300215] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Indexed: 11/11/2022]
|
41
|
Stripping voltammetry at micro-interface arrays: A review. Anal Chim Acta 2013; 769:10-21. [DOI: 10.1016/j.aca.2012.12.031] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Revised: 12/04/2012] [Accepted: 12/18/2012] [Indexed: 11/18/2022]
|
42
|
Ribeiro JA, Silva F, Pereira CM. Electrochemical Study of the Anticancer Drug Daunorubicin at a Water/Oil Interface: Drug Lipophilicity and Quantification. Anal Chem 2013; 85:1582-90. [DOI: 10.1021/ac3028245] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- José A. Ribeiro
- Faculdade de Ciências da Universidade
do Porto, Departamento de Química e Bioquímica, Centro de Investigação em Química, Linha 4, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
| | - F. Silva
- Faculdade de Ciências da Universidade
do Porto, Departamento de Química e Bioquímica, Centro de Investigação em Química, Linha 4, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
| | - Carlos M. Pereira
- Faculdade de Ciências da Universidade
do Porto, Departamento de Química e Bioquímica, Centro de Investigação em Química, Linha 4, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
| |
Collapse
|
43
|
O’Sullivan S, Arrigan DWM. Impact of a Surfactant on the Electroactivity of Proteins at an Aqueous–Organogel Microinterface Array. Anal Chem 2013; 85:1389-94. [DOI: 10.1021/ac302222u] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Shane O’Sullivan
- Nanochemistry Research
Institute, Department
of Chemistry, Curtin University, G.P.O. Box U1987, Perth, Western Australia 6845, Australia
| | - Damien W. M. Arrigan
- Nanochemistry Research
Institute, Department
of Chemistry, Curtin University, G.P.O. Box U1987, Perth, Western Australia 6845, Australia
| |
Collapse
|
44
|
O'Sullivan S, Alvarez de Eulate E, Yuen YH, Helmerhorst E, Arrigan DWM. Stripping voltammetric detection of insulin at liquid–liquid microinterfaces in the presence of bovine albumin. Analyst 2013; 138:6192-6. [DOI: 10.1039/c3an01123b] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
45
|
|
46
|
Alvarez de Eulate E, Serls L, Arrigan DWM. Detection of haemoglobin using an adsorption approach at a liquid–liquid microinterface array. Anal Bioanal Chem 2012; 405:3801-6. [DOI: 10.1007/s00216-012-6622-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Revised: 11/23/2012] [Accepted: 11/29/2012] [Indexed: 10/27/2022]
|
47
|
Riva JS, Bierbrauer K, Beltramo DM, Yudi LM. Electrochemical study of the interfacial behavior of cationic polyelectrolytes and their complexation with monovalent anionic surfactants. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.08.049] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
48
|
|
49
|
Alvarez de Eulate E, Silvester DS, Arrigan DWM. Behavior of Lysozyme at the Electrified Water/Room Temperature Ionic Liquid Interface. Chem Asian J 2012; 7:2559-61. [DOI: 10.1002/asia.201200390] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Indexed: 11/05/2022]
Affiliation(s)
- Eva Alvarez de Eulate
- Department of Chemistry, Nanochemistry Research Institute, Curtin University, GPO Box U1987 Perth WA 6845 (Australia), Fax: (+61) 8 92669735
| | - Debbie S. Silvester
- Department of Chemistry, Nanochemistry Research Institute, Curtin University, GPO Box U1987 Perth WA 6845 (Australia), Fax: (+61) 8 92669735
| | - Damien W. M. Arrigan
- Department of Chemistry, Nanochemistry Research Institute, Curtin University, GPO Box U1987 Perth WA 6845 (Australia), Fax: (+61) 8 92669735
| |
Collapse
|
50
|
Herzog G, Flynn S, Johnson C, Arrigan DW. Electroanalytical Behavior of Poly-l-Lysine Dendrigrafts at the Interface between Two Immiscible Electrolyte Solutions. Anal Chem 2012; 84:5693-9. [DOI: 10.1021/ac300856w] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Grégoire Herzog
- Tyndall National Institute, University College Cork, Lee Maltings, Cork, Ireland
| | - Shane Flynn
- Tyndall National Institute, University College Cork, Lee Maltings, Cork, Ireland
| | - Colm Johnson
- Tyndall National Institute, University College Cork, Lee Maltings, Cork, Ireland
| | - Damien W.M. Arrigan
- Nanochemistry Research Institute,
Department of Chemistry, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
| |
Collapse
|