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Goldoni R, Thomaz DV, Di Giulio T, Malitesta C, Mazzotta E. An insight into polyscopoletin electrosynthesis by a quality-by-design approach. JOURNAL OF MATERIALS SCIENCE 2022; 57:12161-12175. [PMID: 35755421 PMCID: PMC9215150 DOI: 10.1007/s10853-022-07349-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 05/18/2022] [Indexed: 06/15/2023]
Abstract
UNLABELLED Scopoletin (SP) as a functional monomer for electropolymerization has recently been investigated in the context of molecularly imprinted polymers for biosensing applications. Herein we describe an in-depth analysis of the mechanisms involved in the electropolymerization of SP toward the optimization of the experimental conditions for applications in sensor studies. PolySP films have been in situ synthesized on a standard glassy carbon electrodes by varying three independent experimental parameters, and the output of the analysis has been evaluated in terms of the resulting electroactive area and surface coverage. A quality-by-design approach including design-of-experiments principles and response surface methodology produced unbiased observations on the most relevant parameters to be controlled during the electropolymerization of SP. By combining the output of electroactive area and surface overage, we highlighted a strong dependence on the monomer concentration and scan rate. Thus, an appropriate selection of these two parameters should be sought to have an optimal electropolymerization process, leading to uniform films and homogeneous surface behavior. This study shows that the application of multi-factorial analysis in a comprehensive design of experiments allows the systematic study of polymer electrosynthesis. Therefore, this research is expected to guide further efforts in the electropolymerization of several functional monomers. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s10853-022-07349-8.
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Affiliation(s)
- Riccardo Goldoni
- Department of Electronics, Information and Bioengineering (DEIB), Politecnico Di Milano, 20133 Milan, Italy
- National Research Council, Institute of Electronics, Computer and Telecommunication Engineering (CNR-IEIIT), 20133 Milan, Italy
| | - Douglas Vieira Thomaz
- Laboratorio di Chimica Analitica, Dipartimento di Scienze e Tecnologie Biologiche e Ambientali (Di.S.Te.B.A.), Università del Salento, 73100 Lecce, Italy
| | - Tiziano Di Giulio
- Laboratorio di Chimica Analitica, Dipartimento di Scienze e Tecnologie Biologiche e Ambientali (Di.S.Te.B.A.), Università del Salento, 73100 Lecce, Italy
| | - Cosimino Malitesta
- Laboratorio di Chimica Analitica, Dipartimento di Scienze e Tecnologie Biologiche e Ambientali (Di.S.Te.B.A.), Università del Salento, 73100 Lecce, Italy
| | - Elisabetta Mazzotta
- Laboratorio di Chimica Analitica, Dipartimento di Scienze e Tecnologie Biologiche e Ambientali (Di.S.Te.B.A.), Università del Salento, 73100 Lecce, Italy
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Kuzikov AV, Filippova TA, Masamrekh RA, Shumyantseva VV. Electrochemical determination of (S)-7-hydroxywarfarin for analysis of CYP2C9 catalytic activity. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2021.115937] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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3
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Caserta G, Zhang X, Yarman A, Supala E, Wollenberger U, Gyurcsányi RE, Zebger I, Scheller FW. Insights in electrosynthesis, target binding, and stability of peptide-imprinted polymer nanofilms. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138236] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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4
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Warren S, Seddon B, Pilkington R, Crossely A, Holdway P, Dempsey E. β‐Methylumbelliferone Surface Modification and Permeability Investigations at PENTEL
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Graphite Electrodes. ELECTROANAL 2020. [DOI: 10.1002/elan.201900184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Susan Warren
- Centre for Research in Electroanalytical Techniques (CREATE), Centre of Applied Science for Health (CASH) Technlological University Dublin – Tallaght Campus, Tallaght Dublin 24 Ireland
- CREST Technology Gateway Technical University Dublin – City Campus, Kevin St. Dublin 8 Ireland
| | - Brian Seddon
- Microsensors for Clinical Research and Analysis (MiCRA Biodiagnostics), Centre of Applied Science for Health (CASH) Technlological Univertsity Dublin – Tallaght Campus Dublin 24 Ireland
| | - Ruth Pilkington
- Centre of Microbial Host Interactions (CMHI) Technlological Univertsity Dublin – Tallaght Campus Dublin 24 Ireland
| | - Alison Crossely
- Department of Materials Oxford University, Oxford Oxfordshire United Kingdom
| | - Philip Holdway
- Department of Materials Oxford University, Oxford Oxfordshire United Kingdom
| | - Eithne Dempsey
- Department of Chemistry Maynooth University Maynooth Ireland
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5
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Zhang X, Yarman A, Erdossy J, Katz S, Zebger I, Jetzschmann KJ, Altintas Z, Wollenberger U, Gyurcsányi RE, Scheller FW. Electrosynthesized MIPs for transferrin: Plastibodies or nano-filters? Biosens Bioelectron 2018; 105:29-35. [DOI: 10.1016/j.bios.2018.01.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 01/05/2018] [Accepted: 01/07/2018] [Indexed: 02/08/2023]
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6
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Liu X, Hu L, Pan N, Grimaud L, Labbé E, Buriez O, Delacotte J, Lemaître F, Guille-Collignon M. Coupling electrochemistry and TIRF-microscopy with the fluorescent false neurotransmitter FFN102 supports the fluorescence signals during single vesicle exocytosis detection. Biophys Chem 2018; 235:48-55. [PMID: 29477767 DOI: 10.1016/j.bpc.2018.02.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 01/22/2018] [Accepted: 02/07/2018] [Indexed: 01/28/2023]
Abstract
Applications of the Fluorescent False Neurotransmitter FFN102, an analog of biogenic neurotransmitters and a suitable probe for coupled amperometry and TIRFM (total internal reflexion fluorescence microscopy) investigations of exocytotic secretion, were considered here. The electroactivity of FFN102 was shown to very likely arise from the oxidation of its phenolic group through a CE (Chemical-Electrochemical) mechanism. Evidences that the aminoethyl group of FFN102 is the key recognition element by BON N13 cells were also provided. Amperometric measurements were then performed at the single cell level with carbon fiber electrode (CFE) or Indium Tin Oxide (ITO) surfaces. It proved the disparity of kinetic and quantitative parameters of FFN102-stained cells acquired either at cell top and bottom. Moreover, coupled analyses of FFN102 loaded vesicles allowed us to classify three types of optical signals that probably arise from secretion releases thanks to their concomitant detection with an electrochemical spike. Finally, preliminary benefits from the coupling involving FFN102 were reported in terms of origins of overlapped amperometric spikes or assignment of fluorescence extinctions to real exocytotic events.
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Affiliation(s)
- Xiaoqing Liu
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Lihui Hu
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Na Pan
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Laurence Grimaud
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Eric Labbé
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Olivier Buriez
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Jérôme Delacotte
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Frédéric Lemaître
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Manon Guille-Collignon
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France.
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7
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New voltammetric method useful for water insoluble or weakly soluble compounds: application to pKa determination of hydroxyl coumarin derivatives. J Solid State Electrochem 2017. [DOI: 10.1007/s10008-017-3750-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Liu X, Savy A, Maurin S, Grimaud L, Darchen F, Quinton D, Labbé E, Buriez O, Delacotte J, Lemaître F, Guille-Collignon M. A Dual Functional Electroactive and Fluorescent Probe for Coupled Measurements of Vesicular Exocytosis with High Spatial and Temporal Resolution. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611145] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Xiaoqing Liu
- Ecole normale supérieure; PSL Research University, UPMC Univ Paris 06; CNRS; Département de Chimie, PASTEUR; 24, rue Lhomond 75005 Paris France
- Sorbonne Universités; UPMC Univ Paris 06, ENS, CNRS, PASTEUR; 75005 Paris France
| | - Alexandra Savy
- Ecole normale supérieure; PSL Research University, UPMC Univ Paris 06; CNRS; Département de Chimie, PASTEUR; 24, rue Lhomond 75005 Paris France
- Sorbonne Universités; UPMC Univ Paris 06, ENS, CNRS, PASTEUR; 75005 Paris France
| | - Sylvie Maurin
- Ecole normale supérieure; PSL Research University, UPMC Univ Paris 06; CNRS; Département de Chimie, PASTEUR; 24, rue Lhomond 75005 Paris France
- Sorbonne Universités; UPMC Univ Paris 06, ENS, CNRS, PASTEUR; 75005 Paris France
| | - Laurence Grimaud
- Ecole normale supérieure; PSL Research University, UPMC Univ Paris 06; CNRS; Département de Chimie, PASTEUR; 24, rue Lhomond 75005 Paris France
- Sorbonne Universités; UPMC Univ Paris 06, ENS, CNRS, PASTEUR; 75005 Paris France
| | - François Darchen
- Laboratoire de Neurophotonique, CNRS UMR 8250; Université Paris Descartes; 45, rue des Saints-Pères 75006 Paris France
| | - Damien Quinton
- Ecole normale supérieure; PSL Research University, UPMC Univ Paris 06; CNRS; Département de Chimie, PASTEUR; 24, rue Lhomond 75005 Paris France
- Sorbonne Universités; UPMC Univ Paris 06, ENS, CNRS, PASTEUR; 75005 Paris France
| | - Eric Labbé
- Ecole normale supérieure; PSL Research University, UPMC Univ Paris 06; CNRS; Département de Chimie, PASTEUR; 24, rue Lhomond 75005 Paris France
- Sorbonne Universités; UPMC Univ Paris 06, ENS, CNRS, PASTEUR; 75005 Paris France
| | - Olivier Buriez
- Ecole normale supérieure; PSL Research University, UPMC Univ Paris 06; CNRS; Département de Chimie, PASTEUR; 24, rue Lhomond 75005 Paris France
- Sorbonne Universités; UPMC Univ Paris 06, ENS, CNRS, PASTEUR; 75005 Paris France
| | - Jérôme Delacotte
- Ecole normale supérieure; PSL Research University, UPMC Univ Paris 06; CNRS; Département de Chimie, PASTEUR; 24, rue Lhomond 75005 Paris France
- Sorbonne Universités; UPMC Univ Paris 06, ENS, CNRS, PASTEUR; 75005 Paris France
| | - Frédéric Lemaître
- Ecole normale supérieure; PSL Research University, UPMC Univ Paris 06; CNRS; Département de Chimie, PASTEUR; 24, rue Lhomond 75005 Paris France
- Sorbonne Universités; UPMC Univ Paris 06, ENS, CNRS, PASTEUR; 75005 Paris France
| | - Manon Guille-Collignon
- Ecole normale supérieure; PSL Research University, UPMC Univ Paris 06; CNRS; Département de Chimie, PASTEUR; 24, rue Lhomond 75005 Paris France
- Sorbonne Universités; UPMC Univ Paris 06, ENS, CNRS, PASTEUR; 75005 Paris France
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9
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Liu X, Savy A, Maurin S, Grimaud L, Darchen F, Quinton D, Labbé E, Buriez O, Delacotte J, Lemaître F, Guille-Collignon M. A Dual Functional Electroactive and Fluorescent Probe for Coupled Measurements of Vesicular Exocytosis with High Spatial and Temporal Resolution. Angew Chem Int Ed Engl 2017; 56:2366-2370. [PMID: 28117543 DOI: 10.1002/anie.201611145] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 12/13/2016] [Indexed: 01/08/2023]
Abstract
In this work, Fluorescent False Neurotransmitter 102 (FFN102), a synthesized analogue of biogenic neurotransmitters, was demonstrated to show both pH-dependent fluorescence and electroactivity. To study secretory behaviors at the single-vesicle level, FFN102 was employed as a new fluorescent/electroactive dual probe in a coupled technique (amperometry and total internal reflection fluorescence microscopy (TIRFM)). We used N13 cells, a stable clone of BON cells, to specifically accumulate FFN102 into their secretory vesicles, and then optical and electrochemical measurements of vesicular exocytosis were experimentally achieved by using indium tin oxide (ITO) transparent electrodes. Upon stimulation, FFN102 started to diffuse out from the acidic intravesicular microenvironment to the neutral extracellular space, leading to fluorescent emissions and to the electrochemical oxidation signals that were simultaneously collected from the ITO electrode surface. The correlation of fluorescence and amperometric signals resulting from the FFN102 probe allows real-time monitoring of single exocytotic events with both high spatial and temporal resolution. This work opens new possibilities in the investigation of exocytotic mechanisms.
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Affiliation(s)
- Xiaoqing Liu
- Ecole normale supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Département de Chimie, PASTEUR, 24, rue Lhomond, 75005, Paris, France.,Sorbonne Universités, UPMC Univ Paris 06, ENS, CNRS, PASTEUR, 75005, Paris, France
| | - Alexandra Savy
- Ecole normale supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Département de Chimie, PASTEUR, 24, rue Lhomond, 75005, Paris, France.,Sorbonne Universités, UPMC Univ Paris 06, ENS, CNRS, PASTEUR, 75005, Paris, France
| | - Sylvie Maurin
- Ecole normale supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Département de Chimie, PASTEUR, 24, rue Lhomond, 75005, Paris, France.,Sorbonne Universités, UPMC Univ Paris 06, ENS, CNRS, PASTEUR, 75005, Paris, France
| | - Laurence Grimaud
- Ecole normale supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Département de Chimie, PASTEUR, 24, rue Lhomond, 75005, Paris, France.,Sorbonne Universités, UPMC Univ Paris 06, ENS, CNRS, PASTEUR, 75005, Paris, France
| | - François Darchen
- Laboratoire de Neurophotonique, CNRS UMR 8250, Université Paris Descartes, 45, rue des Saints-Pères, 75006, Paris, France
| | - Damien Quinton
- Ecole normale supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Département de Chimie, PASTEUR, 24, rue Lhomond, 75005, Paris, France.,Sorbonne Universités, UPMC Univ Paris 06, ENS, CNRS, PASTEUR, 75005, Paris, France
| | - Eric Labbé
- Ecole normale supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Département de Chimie, PASTEUR, 24, rue Lhomond, 75005, Paris, France.,Sorbonne Universités, UPMC Univ Paris 06, ENS, CNRS, PASTEUR, 75005, Paris, France
| | - Olivier Buriez
- Ecole normale supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Département de Chimie, PASTEUR, 24, rue Lhomond, 75005, Paris, France.,Sorbonne Universités, UPMC Univ Paris 06, ENS, CNRS, PASTEUR, 75005, Paris, France
| | - Jérôme Delacotte
- Ecole normale supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Département de Chimie, PASTEUR, 24, rue Lhomond, 75005, Paris, France.,Sorbonne Universités, UPMC Univ Paris 06, ENS, CNRS, PASTEUR, 75005, Paris, France
| | - Frédéric Lemaître
- Ecole normale supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Département de Chimie, PASTEUR, 24, rue Lhomond, 75005, Paris, France.,Sorbonne Universités, UPMC Univ Paris 06, ENS, CNRS, PASTEUR, 75005, Paris, France
| | - Manon Guille-Collignon
- Ecole normale supérieure, PSL Research University, UPMC Univ Paris 06, CNRS, Département de Chimie, PASTEUR, 24, rue Lhomond, 75005, Paris, France.,Sorbonne Universités, UPMC Univ Paris 06, ENS, CNRS, PASTEUR, 75005, Paris, France
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10
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Fluorescence enhancement aided by metal ion displacement. Biosens Bioelectron 2016; 80:237-242. [PMID: 26851581 DOI: 10.1016/j.bios.2016.01.062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 01/23/2016] [Accepted: 01/27/2016] [Indexed: 12/28/2022]
Abstract
Immunosensors are one of the most common platform used in clinical laboratories, in particular the class based on Enzyme Linked Fluorescent Assays (ELFA) takes advantage of the amplification step of the enzyme, usually the alkaline phosphatase, that catalyzes the hydrolysis of a fluorescent substrate leading it to fluoresce. Anyway, they suffer in sensitivity if compared to molecular diagnostic or more modern in vitro diagnostic devices. In our work, a simple and effective mechanism to enhance the fluorescent signal, and hence the sensitivity of the system, is presented. It is based on the metal ion displacement principle in which a second fluorophore, in our case Calcein Blue, quenched by a cobalt ion is add to the first one (4-MUP), and, in presence of inorganic phosphate, it will be progressively activated by the inorganic phosphate itself leading to the metal displacement. In this way Calcein Blue, newly free to fluoresce, contributes to global fluorescent signal generated by 4-MU. We have tested our proof of principle on a currently used immunoanalyzer, that is VIDAS® system (bioMérieux, Marcy l'Etoile, France) obtaining a fluorescence enhancement of about 50% for each concentration of hydrolyzed 4-MUP tested.
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12
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Tuğral S, Berkem ML. Electrochemical behavior of some ethylenedioxycoumarins: Cathodic dimerization. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2014.04.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Synthesis and evaluation of antioxidant and trypanocidal properties of a selected series of coumarin derivatives. Future Med Chem 2014; 5:1911-22. [PMID: 24175743 DOI: 10.4155/fmc.13.147] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
This article describes the preparation and characterization of a selected series of coumarin derivatives with the aim of evaluating their antioxidant properties and their activity against Trypanosoma cruzi, the parasite responsible for Chagas disease. All the derivatives demonstrated moderate trypanocidal activity in the epimastigote and trypomastigote stages (clone Dm28c), with Compound 3 presenting the highest trypanocidal activity of the entire series, displaying higher activity than nifurtimox, which was used as a reference compound. In addition to the trypanocidal activity, this compound proved to have a very interesting antioxidant profile, as well as no cytotoxicity. These preliminary findings encouraged the authors to study the future structural optimization of this scaffold.
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14
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In situ monitoring of chlorpromazine radical intermediate by spectroelectrochemistry. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.04.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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15
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Zhang WW, He XL, Deng N, Wang Y, He JB. Monitoring of intermediates of clioquinol electro-oxidation by thin-layer spectral and electrophoretic electrochemistry. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.02.069] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Chen YJ, Deng N, Hu B, Wang Y, He JB. Thin layer-based spectral and electrophoretic study of electro-oxidation of solid ellagic acid. J Phys Chem B 2014; 118:2001-8. [PMID: 24495249 DOI: 10.1021/jp4097259] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Acquisition of data from both in situ spectroscopy detection and online chromatography-like separation is important for studying complex electrochemical reactions. The present work provides an example of combination of thin-layer spectral and electrophoretic electrochemistry, both based on thin-layer electrolysis. Two thin-layer electrochemical cells were used to investigate the electro-oxidation of solid ellagic acid at different potentials, in acidic, physiological, and alkaline buffer media. UV-vis spectra and cyclic voltabsorptograms of the oxidation products were recorded in situ without interference from the solid reactant. Four oxidation products, depending upon the buffer pH and the applied potential, were separated and detected by electrophoretic electrochemistry. The major products possess redox stability, possibly with a diquinonemethide structure. The minor product is considered as an o-quinone derivative with a lactone-ring-opening, which can be reduced or further oxidized at appropriate potentials. A consecutive-parallel reaction mechanism is proposed for the formation of four products of ellagic acid in different pH media, which enriches the knowledge about the oxidation pathway and antioxidant property of this biologically active polyphenol compound.
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Affiliation(s)
- Yu-Jiao Chen
- Anhui Key Lab of Controllable Chemical Reaction & Material Chemical Engineering, School of Chemical Engineering, Hefei University of Technology , Hefei 230009, China
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Sun J, Liu SF, Zhang CS, Yu LN, Bi J, Zhu F, Yang QL. Chemical composition and antioxidant activities of Broussonetia papyrifera fruits. PLoS One 2012; 7:e32021. [PMID: 22389678 PMCID: PMC3289642 DOI: 10.1371/journal.pone.0032021] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2011] [Accepted: 01/18/2012] [Indexed: 11/18/2022] Open
Abstract
Fruits of Broussonetia papyrifera from South China were analyzed for their total chemical composition, and antioxidant activities in ethanol and aqueous extracts. In the fruit of this plant, the crude protein, crude fat and carbohydrates was 7.08%, 3.72% and 64.73% of dry weight, respectively. The crude protein, crude fat and carbohydrates were 15.71%, 20.51% and 36.09% of dry weight, respectively. Fatty acid and amino acid composition of the fruit were analyzed. Unsaturated fatty acid concentration was 70.6% of the total fatty acids. The percentage of the essential amino acids (EAAs) was 40.60% of the total amino acids. Furthermore, B. papyrifera fruit are rich in many mineral elements and vitamins. Total phenolic content was assessed using the Folin-Ciocalteau assay, whereas antioxidant activities were assessed by measuring the ability of the two extracts to scavenge DPPH radicals, inhibit peroxidation, and chelate ferric ions. Their reducing power was also assessed. Results indicated that the aqueous extract of B. papyrifera was a more potent reducing agent and radical-scavenger than the ethanol extract. GC-MS analysis of the ethanol extract showed the presence of some acid-containing compounds. The changes in total phenolic content and antioxidant capacity in B. papyrifera from four different regions grown under normal conditions were assessed. The antioxidant activity of different extracts was positively associated with their total phenolic content. These results suggest that the fruit of B. papyrifera could be used in dietary supplement preparations, or as a food additive, for nutritional gain, or to prevent oxidation in food products.
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Affiliation(s)
| | | | | | | | | | | | - Qing-li Yang
- Shandong Peanut Research Institute, Qingdao, People's Republic of China
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A new coumarin-based fluorescence turn-on chemodosimeter for Cu2+ in water. Anal Chim Acta 2011; 702:81-6. [DOI: 10.1016/j.aca.2011.06.041] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Revised: 06/15/2011] [Accepted: 06/21/2011] [Indexed: 12/21/2022]
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