1
|
Rudnicki K, Budzyńska S, Skrzypek S, Poltorak L. Comparative electrochemical study of veterinary drug danofloxacin at glassy carbon electrode and electrified liquid-liquid interface. Sci Rep 2024; 14:14489. [PMID: 38914687 PMCID: PMC11196252 DOI: 10.1038/s41598-024-65246-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Accepted: 06/18/2024] [Indexed: 06/26/2024] Open
Abstract
This work compares the electroanalytical performance of two electroanalytical systems based on (1) the glassy carbon electrode (GCE), and (2) the electrified liquid-liquid interface (eLLI), for the detection of fluoroquinolone antibiotic-danofloxacin (DANO). Our aim was to define the optimal conditions to detect the chosen analyte with two employed systems, extract a number of electroanalytical parameters, study the mechanism of the charge transfer reactions (oxidation at GCE and ion transfer across the eLLI), and to provide physicochemical constants for DANO. Detection of the chosen analyte was also performed in the spiked milk samples. To the best of our knowledge, this is the first work that directly compares the electroanalytical parameters obtained with solid electrode (in this case GCE) and eLLI. We have found that for DANO the latter provides better electroanalytical parameters (lower LOD and LOQ) as well as good selectivity when the milk was analyzed.
Collapse
Affiliation(s)
- Konrad Rudnicki
- Department of Inorganic and Analytical Chemistry, Electrochemistry@Soft Interface Team, Faculty of Chemistry, University of Lodz, Tamka 12, 91-403, Łódź, Poland.
| | - Sylwia Budzyńska
- Department of Chemistry, Faculty of Forestry and Wood Technology, Poznań University of Life Sciences, Wojska Polskiego 75, 60-625, Poznań, Poland
| | - Sławomira Skrzypek
- Department of Inorganic and Analytical Chemistry, Electrochemistry@Soft Interface Team, Faculty of Chemistry, University of Lodz, Tamka 12, 91-403, Łódź, Poland
| | - Lukasz Poltorak
- Department of Inorganic and Analytical Chemistry, Electrochemistry@Soft Interface Team, Faculty of Chemistry, University of Lodz, Tamka 12, 91-403, Łódź, Poland.
| |
Collapse
|
2
|
Voci S, Dick JE. An electrochemical perspective on the interfacial width between two immiscible liquid phases. CURRENT OPINION IN ELECTROCHEMISTRY 2023; 39:101244. [PMID: 37538354 PMCID: PMC10399975 DOI: 10.1016/j.coelec.2023.101244] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/04/2023]
Abstract
Molecular dynamics simulations and vibrational sum-frequency spectroscopy are historically the main techniques applied to the description of the molecular structure and dynamics of the immiscible liquid/liquid interface. A molecular sharpness is estimated for oil/water interfaces, with an interfacial width that extends from hundreds of Å to 1 nm. However, electrochemical studies have elucidated a deeper liquid/liquid interface on the order of several micrometers. The breaking down of single-entity electrochemistry to simpler systems and the combination of high-resolution microscopies is confirming a larger extension of the interface. What can be the role of the electrochemist in clarifying this fundamental question? We try to give a suggestion at the end of a brief historical overview of the liquid/liquid interface studies.
Collapse
|
3
|
|
4
|
Xun Z, Wipf P, McMurray CT. XJB-5-131 Is a Mild Uncoupler of Oxidative Phosphorylation. J Huntingtons Dis 2022; 11:141-151. [PMID: 35404288 PMCID: PMC9798833 DOI: 10.3233/jhd-220539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND Mitochondria (MT) are energy "powerhouses" of the cell and the decline in their function from oxidative damage is strongly correlated in many diseases. To suppress oxygen damage, we have developed and applied XJB-5-131 as a targeted platform for neutralizing reactive oxygen species (ROS) directly in MT. Although the beneficial activity of XJB-5-131 is well documented, the mechanism of its protective effects is not yet fully understood. OBJECTIVE Here, we elucidate the mechanism of protection for XJB-5-131, a mitochondrial targeted antioxidant and electron scavenger. METHODS The Seahorse Flux Analyzer was used to probe the respiratory states of isolated mouse brain mitochondria treated with XJB-5-131 compared to controls. RESULTS Surprisingly, there is no direct impact of XJB-5-131 radical scavenger on the electron flow through the electron transport chain. Rather, XJB-5-131 is a mild uncoupler of oxidative phosphorylation. The nitroxide moiety in XJB-5-131 acts as a superoxide dismutase mimic, which both extracts or donates electrons during redox reactions. The electron scavenging activity of XJB-5-131 prevents the leakage of electrons and reduces formation of superoxide anion, thereby reducing ROS. CONCLUSION We show here that XJB-5-131 is a mild uncoupler of oxidative phosphorylation in MT. The mild uncoupling property of XJB-5-131 arises from its redox properties, which exert a protective effect by reducing ROS-induced damage without sacrificing energy production. Because mitochondrial decline is a common and central feature of toxicity, the favorable properties of XJB-5-131 are likely to be useful in treating Huntington's disease and a wide spectrum of neurodegenerative diseases for which oxidative damage is a key component. The mild uncoupling properties of XJB-5-131 suggest a valuable mechanism of action for the design of clinically effective antioxidants.
Collapse
Affiliation(s)
- Zhiyin Xun
- Molecular Biophysics and Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Peter Wipf
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, USA
| | - Cynthia T. McMurray
- Molecular Biophysics and Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, CA, USA,Correspondence to: Cynthia T. McMurray, Molecular Biophysics and Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. Tel.: +1 510 486 6526; Fax: +1 510 486 6880;
| |
Collapse
|
5
|
Moon H, Park JH. In Situ Probing Liquid/Liquid Interfacial Kinetics through Single Nanodroplet Electrochemistry. Anal Chem 2021; 93:16915-16921. [PMID: 34860502 DOI: 10.1021/acs.analchem.1c04071] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this study, we report the new application of single nanodroplet electrochemistry to in situ monitor the interfacial transfer kinetics of electroactive species across liquid/liquid interface. Interfacial kinetic information is crucial in drug delivery and membrane transport. However, interfacial information has been mainly studied thermodynamically, such as partition coefficient, which could not manifest a speed of transfer. Herein, we measure the phase-transfer kinetic constant via the steady-state electrochemistry of an extracted redox species in a single nanodroplet. The redox species were transferred from the continuous oil phase to the water nanodroplet by partition equilibrium. The transferred redox species are selectively electrolyzed within the droplet when the droplet contacts with an ultramicroelectrode, while the electrochemical reaction of the redox species outside the droplet (i.e., organic solvent) is effectively suppressed by adjusting the electrolyte composition. The redox species in the water droplets can quickly attain a steady state during electrolysis owing to an extensive mass transfer by radial diffusion, and the steady-state current can be analyzed to obtain kinetic information with help from the finite-element method. Finally, a quick calculation method is suggested to estimate the kinetic constant of phase transfer without simulation.
Collapse
Affiliation(s)
- Hyeongkwon Moon
- Department of Chemistry, Chungbuk National University, Cheongju 28644, South Korea
| | - Jun Hui Park
- Department of Chemistry, Chungbuk National University, Cheongju 28644, South Korea
| |
Collapse
|
6
|
3-Nitrotyrosine and related derivatives in proteins: precursors, radical intermediates and impact in function. Essays Biochem 2020; 64:111-133. [PMID: 32016371 DOI: 10.1042/ebc20190052] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 12/30/2019] [Accepted: 01/03/2020] [Indexed: 12/22/2022]
Abstract
Oxidative post-translational modification of proteins by molecular oxygen (O2)- and nitric oxide (•NO)-derived reactive species is a usual process that occurs in mammalian tissues under both physiological and pathological conditions and can exert either regulatory or cytotoxic effects. Although the side chain of several amino acids is prone to experience oxidative modifications, tyrosine residues are one of the preferred targets of one-electron oxidants, given the ability of their phenolic side chain to undergo reversible one-electron oxidation to the relatively stable tyrosyl radical. Naturally occurring as reversible catalytic intermediates at the active site of a variety of enzymes, tyrosyl radicals can also lead to the formation of several stable oxidative products through radical-radical reactions, as is the case of 3-nitrotyrosine (NO2Tyr). The formation of NO2Tyr mainly occurs through the fast reaction between the tyrosyl radical and nitrogen dioxide (•NO2). One of the key endogenous nitrating agents is peroxynitrite (ONOO-), the product of the reaction of superoxide radical (O2•-) with •NO, but ONOO--independent mechanisms of nitration have been also disclosed. This chemical modification notably affects the physicochemical properties of tyrosine residues and because of this, it can have a remarkable impact on protein structure and function, both in vitro and in vivo. Although low amounts of NO2Tyr are detected under basal conditions, significantly increased levels are found at pathological states related with an overproduction of reactive species, such as cardiovascular and neurodegenerative diseases, inflammation and aging. While NO2Tyr is a well-established stable oxidative stress biomarker and a good predictor of disease progression, its role as a pathogenic mediator has been laboriously defined for just a small number of nitrated proteins and awaits further studies.
Collapse
|
7
|
Park JW, Hong SP, Lee JH, Moon SH, Cho YS, Jung KH, Lee J, Lee KH. 99mTc-MIBI uptake as a marker of mitochondrial membrane potential in cancer cells and effects of MDR1 and verapamil. PLoS One 2020; 15:e0228848. [PMID: 32050000 PMCID: PMC7015412 DOI: 10.1371/journal.pone.0228848] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 01/24/2020] [Indexed: 01/03/2023] Open
Abstract
We investigated the relation of 99mTc-MIBI uptake to mitochondrial membrane potential (MMP) in cancer cell lines and patient-derived tumor cells (PDCs). In T47D and HT29 cells with low MDR1 expression, FCCP dose-dependently reduced MMP and 99mTc-MIBI accumulation in similar patterns with nearly perfect linear relationships. T47D and HT29 cells with high MDR1 expression had low 99mTc-MIBI accumulation that was minimally affected by FCCP dose. In these cells, verapamil markedly increased 99mTc-MIBI accumulation to magnitudes that were excessive compared to MMP increase. Decreased plasma membrane potential by verapamil and its recovery by FCCP suggested that enhanced 99mTc-MIBI transport through modified plasma membranes contributed to the excess accumulation. Evaluation of three different colon cancer PDCs with low to modest MDR1 expression verified that FCCP significantly suppressed MMP and similarly reduced 99mTc-MIBI accumulation. Verapamil partially recovered both MMP and 99mTc-MIBI accumulation that was lowered by FCCP. Importantly, a high linear correlation was found (r = 0.865) between 99mTc-MIBI accumulation and MMP in these cells. These findings indicate that low baseline 99mTc-MIBI uptake that is markedly increased by verapamil represents cancer cells with high levels of MDR1 expression. However, in cancer cells with low or modest levels of MDR1 expression that do not markedly increase 99mTc-MIBI uptake by verapamil, the magnitude of uptake is largely dependent on cellular MMP.
Collapse
Affiliation(s)
- Jin Won Park
- Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
- Department of Health Science and Technology, Samsung Advanced Institute for Health Sciences & Technology, Sungkyunkwan University, Seoul, Korea
| | - Sun-pyo Hong
- Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jin Hee Lee
- Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
- Department of Health Science and Technology, Samsung Advanced Institute for Health Sciences & Technology, Sungkyunkwan University, Seoul, Korea
| | - Seung Hwan Moon
- Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Young Seok Cho
- Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Kyung-Ho Jung
- Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
- Department of Health Science and Technology, Samsung Advanced Institute for Health Sciences & Technology, Sungkyunkwan University, Seoul, Korea
- * E-mail: (KHL); (KHJ)
| | - Jeeyun Lee
- Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Kyung-Han Lee
- Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
- Department of Health Science and Technology, Samsung Advanced Institute for Health Sciences & Technology, Sungkyunkwan University, Seoul, Korea
- * E-mail: (KHL); (KHJ)
| |
Collapse
|
8
|
Guo R, Gao L, Liang J, Zhang Z, Zhang J, Niu X, Hu T. Two tetranuclear Cd-based metal–organic frameworks for sensitive sensing of TNP/Fe 3+ in aqueous media and gas adsorption. CrystEngComm 2020. [DOI: 10.1039/d0ce01193b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Two Cd-MOFs were solvothermally synthesized by mixed-ligand strategy. 1 has the largest adsorption selectivity for CO2. Furthermore, 1 and 2 present sensitive sensing for TNP/Fe3+ in water or soil samples.
Collapse
Affiliation(s)
- Ruihong Guo
- Department of Chemistry
- College of Science
- North University of China
- Taiyuan 030051
- China
| | - Lingling Gao
- College of Chemistry and Chemical Engineering
- Jinzhong University
- Taiyuan 030619
- China
| | - Jinxia Liang
- Department of Chemistry
- College of Science
- North University of China
- Taiyuan 030051
- China
| | - Zhikai Zhang
- Department of Chemistry
- College of Science
- North University of China
- Taiyuan 030051
- China
| | - Jie Zhang
- Department of Chemistry
- College of Science
- North University of China
- Taiyuan 030051
- China
| | - Xiaoyan Niu
- Department of Chemistry
- College of Science
- North University of China
- Taiyuan 030051
- China
| | - Tuoping Hu
- Department of Chemistry
- College of Science
- North University of China
- Taiyuan 030051
- China
| |
Collapse
|
9
|
Rudnicki K, Poltorak L, Skrzypek S, Sudhölter EJ. Ion transfer voltammetry for analytical screening of fluoroquinolone antibiotics at the water – 1.2-dichloroethane interface. Anal Chim Acta 2019; 1085:75-84. [DOI: 10.1016/j.aca.2019.07.065] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 07/06/2019] [Accepted: 07/30/2019] [Indexed: 12/12/2022]
|
10
|
Bobba KN, Binoy A, Koo S, Nedungadi D, Podder A, Sharma A, Mishra N, Kim JS, Bhuniya S. Direct readout protonophore induced selective uncoupling and dysfunction of individual mitochondria within cancer cells. Chem Commun (Camb) 2019; 55:6429-6432. [PMID: 31094377 DOI: 10.1039/c9cc01483g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Concurrently, manipulation of mitochondrial activity and its monitoring have enormous significance in cancer therapy and diagnosis. In this context, a fluorescent probe MitoDP has been developed for validating H2S mediated protonophore (2,4-dinitrophenol, DNP) induced mitochondrial membrane potential change, ROS formation and ATP depletion in cancer cells. The extent of protonophore activation for mitochondrial dysfunction is monitored through fluorescence signalling at 450 nm. The current study provides a proof for the concept of endogenous H2S-mediated controlled and spatial release of bioactive agents, or toxins specifically in mitochondria of cancer cells.
Collapse
Affiliation(s)
- Kondapa Naidu Bobba
- Amrita Centre for Industrial Research and Innovation, Amrita School of engineering, Amrita Vishwa Vidyapeetham, Coimbatore, 641-112, India.
| | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Ma J, Bian L, Zhao L, Feng X, Zhao L, Wang Z, Pu Q. Dialysed caramel as an effective fluorophore for the simultaneous detection of three nitrophenols. Talanta 2019; 197:159-167. [DOI: 10.1016/j.talanta.2019.01.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 12/25/2018] [Accepted: 01/02/2019] [Indexed: 12/31/2022]
|
12
|
Poltorak L, Eggink I, Hoitink M, Sudhölter EJR, de Puit M. Electrified Soft Interface as a Selective Sensor for Cocaine Detection in Street Samples. Anal Chem 2018; 90:7428-7433. [PMID: 29781600 PMCID: PMC6011179 DOI: 10.1021/acs.analchem.8b00916] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
![]()
A straightforward,
direct, and selective method is presented for
electrochemical cocaine identification in street samples. The sensing
mechanism is based on a simple ion transfer reaction across the polarized
liquid–liquid interface. The interfacial behavior of a number
of cutting agents is also reported. Interfacial miniaturization has
led to improved electroanalytical properties of the liquid–liquid
interface based sensor as compared with the macroscopic analogue.
The reported method holds great potential to replace colorimetric
tests with poor selectivity for on-site street sample analysis.
Collapse
Affiliation(s)
- Lukasz Poltorak
- Delft University of Technology , Department of Chemical Engineering , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | | | - Marnix Hoitink
- Delft University of Technology , Department of Chemical Engineering , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | - Ernst J R Sudhölter
- Delft University of Technology , Department of Chemical Engineering , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | - Marcel de Puit
- Delft University of Technology , Department of Chemical Engineering , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands.,Netherlands Forensic Institute, Forensic Biometric Traces , Laan van Ypenburg 6 , 2497 GB The Hague , The Netherlands
| |
Collapse
|
13
|
Lipophilicity of acetylcholine and related ions examined by ion transfer voltammetry at a polarized room-temperature ionic liquid membrane. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.03.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
14
|
Ferrer-Sueta G, Campolo N, Trujillo M, Bartesaghi S, Carballal S, Romero N, Alvarez B, Radi R. Biochemistry of Peroxynitrite and Protein Tyrosine Nitration. Chem Rev 2018; 118:1338-1408. [DOI: 10.1021/acs.chemrev.7b00568] [Citation(s) in RCA: 292] [Impact Index Per Article: 48.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Gerardo Ferrer-Sueta
- Laboratorio
de Fisicoquímica Biológica, Facultad de
Ciencias, ‡Center for Free Radical and Biomedical Research, §Departamento de Bioquímica,
Facultad de Medicina, ∥Laboratorio de Enzimología, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Nicolás Campolo
- Laboratorio
de Fisicoquímica Biológica, Facultad de
Ciencias, ‡Center for Free Radical and Biomedical Research, §Departamento de Bioquímica,
Facultad de Medicina, ∥Laboratorio de Enzimología, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Madia Trujillo
- Laboratorio
de Fisicoquímica Biológica, Facultad de
Ciencias, ‡Center for Free Radical and Biomedical Research, §Departamento de Bioquímica,
Facultad de Medicina, ∥Laboratorio de Enzimología, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Silvina Bartesaghi
- Laboratorio
de Fisicoquímica Biológica, Facultad de
Ciencias, ‡Center for Free Radical and Biomedical Research, §Departamento de Bioquímica,
Facultad de Medicina, ∥Laboratorio de Enzimología, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Sebastián Carballal
- Laboratorio
de Fisicoquímica Biológica, Facultad de
Ciencias, ‡Center for Free Radical and Biomedical Research, §Departamento de Bioquímica,
Facultad de Medicina, ∥Laboratorio de Enzimología, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Natalia Romero
- Laboratorio
de Fisicoquímica Biológica, Facultad de
Ciencias, ‡Center for Free Radical and Biomedical Research, §Departamento de Bioquímica,
Facultad de Medicina, ∥Laboratorio de Enzimología, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Beatriz Alvarez
- Laboratorio
de Fisicoquímica Biológica, Facultad de
Ciencias, ‡Center for Free Radical and Biomedical Research, §Departamento de Bioquímica,
Facultad de Medicina, ∥Laboratorio de Enzimología, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| | - Rafael Radi
- Laboratorio
de Fisicoquímica Biológica, Facultad de
Ciencias, ‡Center for Free Radical and Biomedical Research, §Departamento de Bioquímica,
Facultad de Medicina, ∥Laboratorio de Enzimología, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
| |
Collapse
|
15
|
Childress ES, Alexopoulos SJ, Hoehn KL, Santos WL. Small Molecule Mitochondrial Uncouplers and Their Therapeutic Potential. J Med Chem 2017; 61:4641-4655. [DOI: 10.1021/acs.jmedchem.7b01182] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Elizabeth S. Childress
- Department of Chemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Stephanie J. Alexopoulos
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Kensington, NSW 2033, Australia
| | - Kyle L. Hoehn
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Kensington, NSW 2033, Australia
- Departments of Pharmacology and Medicine, Cardiovascular Research Center, and Emily Couric Clinical Cancer Center, University of Virginia, Charlottesville, Virginia 22908, United States
| | - Webster L. Santos
- Department of Chemistry and Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| |
Collapse
|
16
|
Poltorak L, Sudhölter EJ, de Smet LC. Effect of charge of quaternary ammonium cations on lipophilicity and electroanalytical parameters: Task for ion transfer voltammetry. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.04.051] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
17
|
Nakamura M, Osakai T. Evaluation of the membrane permeability of drugs by ion-transfer voltammetry with the oil | water interface. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.05.005] [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]
|
18
|
|
19
|
Gu J, Zhao W, Chen Y, Zhang X, Xie X, Liu S, Wu X, Zhu Z, Li M, Shao Y. Study of Ion Transfer Coupling with Electron Transfer by Hydrophilic Droplet Electrodes. Anal Chem 2015; 87:11819-25. [DOI: 10.1021/acs.analchem.5b03280] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jing Gu
- Beijing National Laboratory
for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Wenbo Zhao
- Beijing National Laboratory
for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Ye Chen
- Beijing National Laboratory
for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Xin Zhang
- Beijing National Laboratory
for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Xiang Xie
- Beijing National Laboratory
for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Shujuan Liu
- Beijing National Laboratory
for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Xiaofeng Wu
- Beijing National Laboratory
for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Zhiwei Zhu
- Beijing National Laboratory
for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Meixian Li
- Beijing National Laboratory
for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Yuanhua Shao
- Beijing National Laboratory
for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| |
Collapse
|
20
|
Abstract
The main aspects related to the charge transfer reactions occurring at the interface between two immiscible electrolyte solutions (ITIES) are described. The particular topics to be discussed involve simple ion transfer. Focus is given on theoretical approaches, numerical simulations, and experimental methodologies. Concerning the theoretical procedures, different computational simulations related to simple ion transfer are reviewed. The main conclusions drawn from the most accepted models are described and analyzed in regard to their relevance for explaining different aspects of ion transfer. We describe numerical simulations implementing different approaches for solving the differential equations associated with the mass transport and charge transfer. These numerical simulations are correlated with selected experimental results; their usefulness in designing new experiments is summarized. Finally, many practical applications can be envisaged regarding the determination of physicochemical properties, electroanalysis, drug lipophilicity, and phase-transfer catalysis.
Collapse
|
21
|
Effect of ligand protonation on the facilitated ion transfer reactions across oil/water interfaces. IV. Buffer solution effect. J Electroanal Chem (Lausanne) 2010. [DOI: 10.1016/j.jelechem.2010.02.035] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
22
|
Abraham MH, Acree WE. Solute Descriptors for Phenoxide Anions and Their Use To Establish Correlations of Rates of Reaction of Anions with Iodomethane. J Org Chem 2010; 75:3021-6. [DOI: 10.1021/jo100292j] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael H. Abraham
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - William E. Acree
- Department of Chemistry, 1155 Union Circle Drive no. 305070, University of North Texas, Denton, Texas 76203-5017
| |
Collapse
|
23
|
Benvidi A, Lanjwani SN, Ding Z. Facilitated proton transfer by 2-acetylpyridine-4-phenyl-3-thiosemicarbazone across water/1,2-dichloroethane interface. J Electroanal Chem (Lausanne) 2010. [DOI: 10.1016/j.jelechem.2009.12.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
24
|
Deryabina MA, Hansen SH, Østergaard J, Jensen H. Effect of α-Cyclodextrin on Drug Distribution Studied by Electrochemistry at Interfaces between Immiscible Electrolyte Solutions. J Phys Chem B 2009; 113:7263-9. [DOI: 10.1021/jp901247p] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Maria A. Deryabina
- Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Steen H. Hansen
- Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Jesper Østergaard
- Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Henrik Jensen
- Department of Pharmaceutics and Analytical Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| |
Collapse
|
25
|
Steel WH, Foresman JB, Burden DK, Lau YY, Walker RA. Solvation of Nitrophenol Isomers: Consequences for Solute Electronic Structure and Alkane/Water Partitioning. J Phys Chem B 2008; 113:759-66. [DOI: 10.1021/jp805184w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- William H. Steel
- Department of Physical Sciences, York College of Pennsylvania, York, Pennsylvania 17405,
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, and Department of Chemistry and Biochemistry and Chemical Physics Program, University of Maryland, College Park, Maryland 20742
| | - James B. Foresman
- Department of Physical Sciences, York College of Pennsylvania, York, Pennsylvania 17405,
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, and Department of Chemistry and Biochemistry and Chemical Physics Program, University of Maryland, College Park, Maryland 20742
| | - Daniel K. Burden
- Department of Physical Sciences, York College of Pennsylvania, York, Pennsylvania 17405,
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, and Department of Chemistry and Biochemistry and Chemical Physics Program, University of Maryland, College Park, Maryland 20742
| | - Yuen Y. Lau
- Department of Physical Sciences, York College of Pennsylvania, York, Pennsylvania 17405,
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, and Department of Chemistry and Biochemistry and Chemical Physics Program, University of Maryland, College Park, Maryland 20742
| | - Robert A. Walker
- Department of Physical Sciences, York College of Pennsylvania, York, Pennsylvania 17405,
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, and Department of Chemistry and Biochemistry and Chemical Physics Program, University of Maryland, College Park, Maryland 20742
| |
Collapse
|
26
|
Morales-Morales JA, Frontana C, Aguilar-Martínez M, Bautista-Martínez JA, González FJ, González I. Analysis of the Substituent Effect on the Reactivity Modulation during Self-Protonation Processes in 2-Nitrophenols. J Phys Chem A 2007; 111:8993-9002. [PMID: 17715902 DOI: 10.1021/jp0725477] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A voltammetric and spectroelectrochemical ESR study of the reduction processes of five substituted 4-R-2-nitrophenols (R = -H, -OCH(3), -CH(3), -CN, -CF(3)) in acetonitrile was performed. In the potential range considered here (-0.2 to -2.5 V vs Fc+/Fc), two reduction signals (Ic and IIc) were detected; the first one was associated with the formation of the corresponding hydroxylamine via a self-protonation pathway. The voltammetric analysis at the first reduction signal showed that there are differences in the reduction pathway for each substituted 4-R-2-nitrophenol, being the E1/2 values determined by the inductive effect of the substituent in the meta position with respect to the nitro group, while the electron-transfer kinetics was determined by the protonation rate (k(1)+ ) of the anion radical electrogenerated. However, at potential values near the first reduction peak, no ESR signal was recorded from stable radical species, indicating the instability of the radical species in solution. Nevertheless, an intense ESR spectrum generated at the second reduction peak was detected for all compounds, indicating the monoelectronic reduction of the corresponding deprotonated 4-R-2-nitrophenols. The spin-coupling hyperfine structures revealed differences in the chemical nature of the electrogenerated radical; meanwhile, the -CF(3) and -CN substituents induced the formation of a dianion radical structure, and the -H, -CH(3), and -OCH(3) substituents provoked the formation of an anion radical structure due to protonation by acetonitrile molecules of the initially electrogenerated dianion radical. This behavior was confirmed by analyzing the ESR spectra in deuterated acetonitrile and by performing quantum chemical calculations of the spin densities at each site of the electrogenerated anionic radicals.
Collapse
|
27
|
Garcia J, Iglesias R, Dassie S. Effect of ligand protonation on the facilitated ion transfer reactions across oil|water interfaces. III. Digital simulation and experimental approach. J Electroanal Chem (Lausanne) 2006. [DOI: 10.1016/j.jelechem.2005.10.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
28
|
Novaroli L, Bouchard Doulakas G, Reist M, Rolando B, Fruttero R, Gasco A, Carrupt PA. The Lipophilicity Behavior of Three Catechol-O-methyltransferase (COMT) Inhibitors and Simple Analogues. Helv Chim Acta 2006. [DOI: 10.1002/hlca.200690007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
29
|
Effect of ligand protonation on the facilitated ion transfer reactions across oil|water interfaces. II. Complex formation. J Electroanal Chem (Lausanne) 2005. [DOI: 10.1016/j.jelechem.2005.09.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
30
|
Gulaboski R, Pereira CM, Cordeiro MNDS, Bogeski I, Ferreira E, Ribeiro D, Chirea M, Silva AF. Electrochemical Study of Ion Transfer of Acetylcholine Across the Interface of Water and a Lipid-Modified 1,2-Dichloroethane. J Phys Chem B 2005; 109:12549-59. [PMID: 16852552 DOI: 10.1021/jp050929b] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The ion transfer of acetylcholine (AcH(+)) ions across the unmodified and phospholipid-modified water|1,2-dichloroethane (DCE) interface has been studied by means of square-wave and cyclic voltammetry, as well as by electrochemical impedance spectroscopy. After being transferred in the organic phase, the AcH(+) ions undergo chemical reactions with the phospholipids. The overall behavior of the experimental system studied in the presence of phospholipids has been compared with the theoretical results of an ECrev reaction. The kinetic parameters of the chemical interactions between AcH(+) and the phospholipids have been determined from the voltammetric and impedance measurements. Additional characterization of those interactions has been made by using the surface tension measurements.
Collapse
Affiliation(s)
- Rubin Gulaboski
- Departamento de Quimica, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal
| | | | | | | | | | | | | | | |
Collapse
|
31
|
Dassie S. Effect of ligand protonation on the facilitated ion transfer reactions across oil|water interfaces. I. Water autoprotolysis. J Electroanal Chem (Lausanne) 2005. [DOI: 10.1016/j.jelechem.2004.12.035] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
32
|
Abraham MH, Zhao YH. Characterisation of the water/o-nitrophenyl octyl ether system in terms of the partition of nonelectrolytes and of ions. Phys Chem Chem Phys 2005; 7:2418-22. [PMID: 15962024 DOI: 10.1039/b502058a] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Abraham linear free energy relationship, or solvation equation, has been applied to literature data on the partition of nonelectrolytes in the water to o-nitrophenyl octyl ether (NPOE) system. The resulting equation is compared to equations for other water to solvent systems using the D-parameter of Abraham and Martins and the theta-parameter of Ishihama and Asakawa. It is shown that as a solvent in partitioning systems, NPOE quite resembles nitrobenzene and 1,2-dichloroethane, and that the latter does not resemble an alkane-like solvent. Using descriptors for simple ions that we have previously obtained, we show that ions and nonelectrolytes can be included in the same linear free energy relationship.
Collapse
Affiliation(s)
- Michael H Abraham
- Department of Chemistry, University College London, 20 Gordon Street, London, UK.
| | | |
Collapse
|
33
|
KAKIUCHI T, TSUJIOKA N, SUEISHI K, NISHI N, YAMAMOTO M. Polarized Potential Window Available at the Interface Between an Aqueous Electrolyte Solution and Tetraalkylammonium Imide Salts. ELECTROCHEMISTRY 2004. [DOI: 10.5796/electrochemistry.72.833] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Takashi KAKIUCHI
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University
| | - Norihiro TSUJIOKA
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University
| | - Kenji SUEISHI
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University
| | - Naoya NISHI
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University
| | - Masahiro YAMAMOTO
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University
| |
Collapse
|
34
|
Gulaboski R, Galland A, Bouchard G, Caban K, Kretschmer A, Carrupt PA, Stojek Z, Girault HH, Scholz F. A Comparison of the Solvation Properties of 2-Nitrophenyloctyl Ether, Nitrobenzene, and n-Octanol as Assessed by Ion Transfer Experiments. J Phys Chem B 2004. [DOI: 10.1021/jp037670m] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rubin Gulaboski
- Institut für Chemie und Biochemie, Universität Greifswald, Soldmannstrasse 23, D-17489 Greifswald, Germany, Institut de Chimie Thérapeutique, Université de Lausanne, CH-1015 Lausanne, Switzerland, Department of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warszawa, Poland, and Laboratoire d'Électrochimie Physique et Analytique, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Alexandra Galland
- Institut für Chemie und Biochemie, Universität Greifswald, Soldmannstrasse 23, D-17489 Greifswald, Germany, Institut de Chimie Thérapeutique, Université de Lausanne, CH-1015 Lausanne, Switzerland, Department of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warszawa, Poland, and Laboratoire d'Électrochimie Physique et Analytique, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Géraldine Bouchard
- Institut für Chemie und Biochemie, Universität Greifswald, Soldmannstrasse 23, D-17489 Greifswald, Germany, Institut de Chimie Thérapeutique, Université de Lausanne, CH-1015 Lausanne, Switzerland, Department of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warszawa, Poland, and Laboratoire d'Électrochimie Physique et Analytique, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Karolina Caban
- Institut für Chemie und Biochemie, Universität Greifswald, Soldmannstrasse 23, D-17489 Greifswald, Germany, Institut de Chimie Thérapeutique, Université de Lausanne, CH-1015 Lausanne, Switzerland, Department of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warszawa, Poland, and Laboratoire d'Électrochimie Physique et Analytique, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Ansgar Kretschmer
- Institut für Chemie und Biochemie, Universität Greifswald, Soldmannstrasse 23, D-17489 Greifswald, Germany, Institut de Chimie Thérapeutique, Université de Lausanne, CH-1015 Lausanne, Switzerland, Department of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warszawa, Poland, and Laboratoire d'Électrochimie Physique et Analytique, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Pierre-Alain Carrupt
- Institut für Chemie und Biochemie, Universität Greifswald, Soldmannstrasse 23, D-17489 Greifswald, Germany, Institut de Chimie Thérapeutique, Université de Lausanne, CH-1015 Lausanne, Switzerland, Department of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warszawa, Poland, and Laboratoire d'Électrochimie Physique et Analytique, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Zbigniew Stojek
- Institut für Chemie und Biochemie, Universität Greifswald, Soldmannstrasse 23, D-17489 Greifswald, Germany, Institut de Chimie Thérapeutique, Université de Lausanne, CH-1015 Lausanne, Switzerland, Department of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warszawa, Poland, and Laboratoire d'Électrochimie Physique et Analytique, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Hubert H. Girault
- Institut für Chemie und Biochemie, Universität Greifswald, Soldmannstrasse 23, D-17489 Greifswald, Germany, Institut de Chimie Thérapeutique, Université de Lausanne, CH-1015 Lausanne, Switzerland, Department of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warszawa, Poland, and Laboratoire d'Électrochimie Physique et Analytique, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Fritz Scholz
- Institut für Chemie und Biochemie, Universität Greifswald, Soldmannstrasse 23, D-17489 Greifswald, Germany, Institut de Chimie Thérapeutique, Université de Lausanne, CH-1015 Lausanne, Switzerland, Department of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warszawa, Poland, and Laboratoire d'Électrochimie Physique et Analytique, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| |
Collapse
|
35
|
Walker DS, Brown MG, McFearin CL, Richmond GL. Evidence for a Diffuse Interfacial Region at the Dichloroethane/Water Interface. J Phys Chem B 2004. [DOI: 10.1021/jp031147q] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dave S. Walker
- Department of Chemistry and Materials Science Institute, University of Oregon, Eugene, Oregon 97403
| | - Mac G. Brown
- Department of Chemistry and Materials Science Institute, University of Oregon, Eugene, Oregon 97403
| | - Cathryn L. McFearin
- Department of Chemistry and Materials Science Institute, University of Oregon, Eugene, Oregon 97403
| | - G. L. Richmond
- Department of Chemistry and Materials Science Institute, University of Oregon, Eugene, Oregon 97403
| |
Collapse
|
36
|
Scholz F, Gulaboski R, Caban K. The determination of standard Gibbs energies of transfer of cations across the nitrobenzene|water interface using a three-phase electrode. Electrochem commun 2003. [DOI: 10.1016/j.elecom.2003.09.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
|
37
|
Zhang M, Sun P, Chen Y, Li F, Gao Z, Shao Y. Studies of Effect of Phase Volume Ratio on Transfer of Ionizable Species across the Water/1,2-Dichloroethane Interface by a Three-Electrode Setup. Anal Chem 2003; 75:4341-5. [PMID: 14632156 DOI: 10.1021/ac0263824] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The electrochemical behavior of pyridine distribution at the water/1,2-dichloroethane interface with variable phase volume ratios (r = Vo/Vw) was investigated by cyclic voltammetry. The system was composed of an aqueous droplet supported on a Ag/AgCl disk electrode covered with an organic solution or an organic droplet supported on a Ag/AgTPBCl disk electrode covered with an aqueous solution. In this way, a conventional three-electrode potentiostat can be used to study an ionizable compound transfer process at a liquid/liquid interface with a wide range of phase volume ratios (from 0.0004 to 1 and from 1 to 2500). Using this special cell we designed, only very small volumes of both phase were needed for r equal to unity, which is very useful for the investigation of the distribution of ionizable species at a biphasic system when the available amount of species is limited. The ionic partition diagrams were obtained for different phase volume ratios.
Collapse
Affiliation(s)
- Meiqin Zhang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | | | | | | | | | | |
Collapse
|
38
|
Gulaboski R, Scholz F. Lipophilicity of Peptide Anions: An Experimental Data Set for Lipophilicity Calculations. J Phys Chem B 2003. [DOI: 10.1021/jp034387e] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rubin Gulaboski
- Ernst-Moritz-Arndt-Universität Greifswald, Institut für Chemie und Biochemie, Soldmannstrasse 23, D-17489 Greifswald, Germany
| | - Fritz Scholz
- Ernst-Moritz-Arndt-Universität Greifswald, Institut für Chemie und Biochemie, Soldmannstrasse 23, D-17489 Greifswald, Germany
| |
Collapse
|
39
|
|
40
|
Gobry V, Ulmeanu S, Reymond F, Bouchard G, Carrupt PA, Testa B, Girault HH. Generalization of ionic partition diagrams to lipophilic compounds and to biphasic systems with variable phase volume ratios. J Am Chem Soc 2001; 123:10684-90. [PMID: 11674000 DOI: 10.1021/ja015914f] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The ionic partition diagram methodology has been generalized to address both hydrophilic and lipophilic compounds and to consider biphasic systems with variable phase volume ratios. With this generalized approach electrochemical measurements of ion transfer potentials afford the determination of the standard partition coefficients of all forms of ionizable molecules, including the neutral form, as well as the evaluation of the dissociation constant of monoprotic substances. An interesting consequence of this approach is the definition of an extraction pK(a,ext) which is the apparent pK(a) of neutral acids and bases when dissolved in the organic phase.
Collapse
Affiliation(s)
- V Gobry
- Laboratoire d'électrochimie, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | | | | | | | | | | | | |
Collapse
|
41
|
Reymond F, Fermı́n D, Lee HJ, Girault HH. Electrochemistry at liquid/liquid interfaces: methodology and potential applications. Electrochim Acta 2000. [DOI: 10.1016/s0013-4686(00)00343-1] [Citation(s) in RCA: 195] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
42
|
Kong YT, Kakiuchi T. Electrochemical determination of the lipophilicity scale of arenediazonium ions based on the ion transfer across the liquid∣liquid interface. J Electroanal Chem (Lausanne) 2000. [DOI: 10.1016/s0022-0728(00)00012-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
|
43
|
Grandi T, Sparatore F, Gnerre C, Crivori P, Carrupt PA, Testa B. Monoamine oxidase inhibitor properties of some benzazoles: structure-activity relationships. AAPS PHARMSCI 1999; 1:E16. [PMID: 11741212 PMCID: PMC2751346 DOI: 10.1208/ps010416] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Benzazoles containing two or three nitrogen atoms were screened for their inhibitory activity toward monoamine oxidases MAO-A and MAO-B. In order to clarify the mechanism of interaction of these compounds with the enzyme, their electronic structure was calculated at the ab initio level and the influence of lipophilicity on activity was investigated. The mode of binding of benzazoles to MAO-B appears different from that of previously investigated heterocycles.
Collapse
Affiliation(s)
- Teresa Grandi
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Viale Benedetto XV, 3, I-16132 Genova, Italy
| | - Fabio Sparatore
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Viale Benedetto XV, 3, I-16132 Genova, Italy
| | - Carmela Gnerre
- Institute of Medicinal Chemistry, School of Pharmacy, BEP, University of Lausanne, CH-1015 Lausanne-Dorigny, Switzerland
| | - Patrizia Crivori
- Institute of Medicinal Chemistry, School of Pharmacy, BEP, University of Lausanne, CH-1015 Lausanne-Dorigny, Switzerland
| | - Pierre-Alain Carrupt
- Institute of Medicinal Chemistry, School of Pharmacy, BEP, University of Lausanne, CH-1015 Lausanne-Dorigny, Switzerland
| | - Bernard Testa
- Institute of Medicinal Chemistry, School of Pharmacy, BEP, University of Lausanne, CH-1015 Lausanne-Dorigny, Switzerland
| |
Collapse
|
44
|
Combined molecular lipophilicity descriptors and their role in understanding intramolecular effects. PHARMACEUTICAL SCIENCE & TECHNOLOGY TODAY 1999; 2:327-335. [PMID: 10441277 DOI: 10.1016/s1461-5347(99)00180-7] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Traditional lipophilicity parameters (log P and log D) are well-known physico-chemical descriptors largely used in QSAR studies. Besides their numerical value, log P data contain a variety of information about inter- and intramolecular forces affecting partitioning and its related biological phenomena. The deconvolution of information from log P can be accessed only by adequate interpretative tools, such as new lipophilic-combined descriptors, of which features and some applications are presented in this review.
Collapse
|