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Thomas N, Singh V, Ahmed N, Trinh D, Kuss S. Single-cell scanning photoelectrochemical microscopy using micro-optical-ring electrodes. Biosens Bioelectron 2022; 217:114658. [PMID: 36115122 DOI: 10.1016/j.bios.2022.114658] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 08/18/2022] [Accepted: 08/23/2022] [Indexed: 11/02/2022]
Abstract
Microelectrodes as analytical sensing tools have gained immense popularity in a wide range of applications, ranging from probe design advancement to single live cell imaging. Micro-optical-ring electrodes (MOREs) are micro-scale ring-electrodes with an optical fiber core, that enables the MORE to conduct an optical signal while performing electrochemistry. Herein, we present a user-friendly and cost-effective method to fabricate MOREs for scanning photoelectrochemical microscopy (SPECM) applications. MOREs were characterized by electrochemistry, numerical modelling, and scanning electron microscopy (SEM), ensuring reproducibility in terms of a well-defined geometry and functionality. In this study, the integration of MOREs into scanning probe microscopy enabled the spectro-electrochemical detection of N, N, N, N'- Tetramethyl-p-phenyl-enediamine (TMPD) and its oxidized radical cation counterpart. UV-VIS spectroscopy capabilities of MOREs were optimized through tip-to-substrate distance variations. To demonstrate the applicability of MOREs to electrochemical single live cell imaging, oxygen production was detected in living algae (Eremosphaera viridis) by local illumination and concurrent electrochemical measurements.
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Affiliation(s)
- Nikita Thomas
- Laboratory for Bioanalytics and Electrochemical Sensing, Department of Chemistry, University of Manitoba, Winnipeg, R3T 2N2, Canada
| | - Vikram Singh
- Laboratory for Bioanalytics and Electrochemical Sensing, Department of Chemistry, University of Manitoba, Winnipeg, R3T 2N2, Canada
| | - Nafisa Ahmed
- Laboratory for Bioanalytics and Electrochemical Sensing, Department of Chemistry, University of Manitoba, Winnipeg, R3T 2N2, Canada
| | - Dao Trinh
- Laboratoire des Sciences de l'Ingénieur pour l'Environnement (LaSIE) UMR CNRS 7356, Université de La Rochelle, Pôle Sciences et Technologie, Avenue Michel Crépeau, 17042, La Rochelle, Cedex 1, France
| | - Sabine Kuss
- Laboratory for Bioanalytics and Electrochemical Sensing, Department of Chemistry, University of Manitoba, Winnipeg, R3T 2N2, Canada.
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2
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Prabhakaran V, Romo J, Bhattarai A, George K, Norberg ZM, Kalb D, Aprà E, Kottke PA, Fedorov AG, El-Khoury PZ, Johnson GE, Laskin J. Integrated photoelectrochemical energy storage cells prepared by benchtop ion soft landing. Chem Commun (Camb) 2022; 58:9060-9063. [PMID: 35899861 PMCID: PMC9367248 DOI: 10.1039/d2cc02595g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The exceptional photochromic and redox properties of polyoxometalate anions, PW12O403−, have been exploited to develop an integrated photoelectrochemical energy storage cell for conversion and storage of solar energy. Elimination of strongly coordinating cations using benchtop ion soft landing leads to a ∼370% increase in the maximum power output of the device. Additionally, the photocathode displayed a pronounced color change from clear to blue upon irradiation, which warrants the potential application of the IPES cell in advanced smart windows and photochromic lenses. Soft landing eliminates counter cations from Keggin polyoxometalate-based photocathodes, resulting in a ∼370% increase in maximum power output from a novel device that simultaneously harvests and stores solar energy.![]()
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Affiliation(s)
| | - Joelle Romo
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA.
| | - Ashish Bhattarai
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA.
| | - Kyle George
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA.
| | - Zachary M Norberg
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA.
| | - David Kalb
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA.
| | - Edoardo Aprà
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Peter A Kottke
- School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Andrei G Fedorov
- School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Patrick Z El-Khoury
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA.
| | - Grant E Johnson
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, 99352, USA.
| | - Julia Laskin
- Department of Chemistry, Purdue University, West Lafayette, IN, 47907, USA.
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3
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Alvarez MS, Houzé C, Groni S, Schöllhorn B, Fave C. Halogen bonding effect on electrochemical anion oxidation in ionic liquids. Org Biomol Chem 2021; 19:7587-7593. [PMID: 34524327 DOI: 10.1039/d1ob01031j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Three Ionic liquids (ILs) based on an imidazolium core have been compared and used as solvents for the oxidation of various anions. Electrochemical experiments as well as NMR titrations and X-ray diffraction analyses unambiguously confirm the crucial role of non-covalent halogen bonding on the oxidation potentials and consequently the electrochemical window of the respective ILs.
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Affiliation(s)
- Marie Stacey Alvarez
- Université de Paris - Laboratoire d'Electrochimie Moléculaire, CNRS, F-75006 Paris, France.
| | - Cedric Houzé
- Université de Paris - Laboratoire d'Electrochimie Moléculaire, CNRS, F-75006 Paris, France.
| | - Sihem Groni
- Université de Paris - Laboratoire d'Electrochimie Moléculaire, CNRS, F-75006 Paris, France.
| | - Bernd Schöllhorn
- Université de Paris - Laboratoire d'Electrochimie Moléculaire, CNRS, F-75006 Paris, France.
| | - Claire Fave
- Université de Paris - Laboratoire d'Electrochimie Moléculaire, CNRS, F-75006 Paris, France.
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4
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Chakraborty M, Barik S, Mahapatra A, Sarkar M. Binary mixtures of ionic liquids: Ideal, non-ideal, or quasi-ideal? J Chem Phys 2021; 154:224507. [PMID: 34241225 DOI: 10.1063/5.0051417] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The mixing of ILs provides an opportunity for fine tuning the physiochemical properties of ILs for various applications. However, a suitable mixture having desired properties can only be designed when the physiochemical properties of the mixtures of ILs along with their spectroscopic properties are well understood. With an aim to achieve this objective, three different mixtures with a common anion, namely, [C2C1im][C4C1im][NTf2], [C3C1pyr][C4C1pyr][NTf2], and [C3C1im][C3C1pyr][NTf2], have been investigated in the current study. Investigations have been carried out at the macroscopic level by observing the thermophysical properties, such as molar volume and thermal expansion coefficient, and at the microscopic level with time-resolved fluorescence measurements and the pulse field gradient nuclear magnetic resonance (NMR) technique. The results obtained from the thermophysical study have indicated that excess molar volume for imidazolium-based IL-IL mixtures may be linked to the free volume created by the alkyl chain of the imidazolium cation whereas for the mixture of pyrrolidinium ILs, lowering of density can give rise to free volume. Analysis of time-resolved fluorescence anisotropy data has provided clear evidence in favor of the presence of free volume in the binary mixture of ILs. NMR studies have also supported the fluorescence anisotropy data. The outcome of the present investigation reveals that the mixtures show appreciable deviation from ideal behavior and the deviation from the ideal behavior is caused due to the generation of free volume in the resultant mixture, describing these IL mixtures as quasi-ideal rather than ideal or non-ideal.
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Affiliation(s)
- Manjari Chakraborty
- School of Chemical Sciences, National Institute of Science Education and Research, Bhubaneswar, HBNI, Bhimpur-Padanpur, Jatani, Khordha 752050, Odisha, India
| | - Sahadev Barik
- School of Chemical Sciences, National Institute of Science Education and Research, Bhubaneswar, HBNI, Bhimpur-Padanpur, Jatani, Khordha 752050, Odisha, India
| | - Amita Mahapatra
- School of Chemical Sciences, National Institute of Science Education and Research, Bhubaneswar, HBNI, Bhimpur-Padanpur, Jatani, Khordha 752050, Odisha, India
| | - Moloy Sarkar
- School of Chemical Sciences, National Institute of Science Education and Research, Bhubaneswar, HBNI, Bhimpur-Padanpur, Jatani, Khordha 752050, Odisha, India
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5
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Iamprasertkun P, Ejigu A, Dryfe RAW. Understanding the electrochemistry of "water-in-salt" electrolytes: basal plane highly ordered pyrolytic graphite as a model system. Chem Sci 2020; 11:6978-6989. [PMID: 34122994 PMCID: PMC8159404 DOI: 10.1039/d0sc01754j] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 06/05/2020] [Indexed: 12/21/2022] Open
Abstract
A new approach to expand the accessible voltage window of electrochemical energy storage systems, based on so-called "water-in-salt" electrolytes, has been expounded recently. Although studies of transport in concentrated electrolytes date back over several decades, the recent demonstration that concentrated aqueous electrolyte systems can be used in the lithium ion battery context has rekindled interest in the electrochemical properties of highly concentrated aqueous electrolytes. The original aqueous lithium ion battery conception was based on the use of concentrated solutions of lithium bis(trifluoromethanesulfonyl)imide, although these electrolytes still possess some drawbacks including cost, toxicity, and safety. In this work we describe the electrochemical behavior of a simple 1 : 1 electrolyte based on highly concentrated aqueous solutions of potassium fluoride (KF). Highly ordered pyrolytic graphite (HOPG) is used as well-defined model carbon to study the electrochemical properties of the electrolyte, as well as its basal plane capacitance, from a microscopic perspective: the KF electrolyte exhibits an unusually wide potential window (up to 2.6 V). The faradaic response on HOPG is also reported using K3Fe(CN)6 as a model redox probe: the highly concentrated electrolyte provides good electrochemical reversibility and protects the HOPG surface from adsorption of contaminants. Moreover, this electrolyte was applied to symmetrical supercapacitors (using graphene and activated carbon as active materials) in order to quantify its performance in energy storage applications. It is found that the activated carbon and graphene supercapacitors demonstrate high gravimetric capacitance (221 F g-1 for activated carbon, and 56 F g-1 for graphene), a stable working voltage window of 2.0 V, which is significantly higher than the usual range of water-based capacitors, and excellent stability over 10 000 cycles. These results provide fundamental insight into the wider applicability of highly concentrated electrolytes, which should enable their application in future of energy storage technologies.
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Affiliation(s)
- Pawin Iamprasertkun
- Department of Chemistry, University of Manchester Oxford Road Manchester M13 9PL UK +44 (0)161-275-4598
- National Graphene Institute, University of Manchester Oxford Road M13 9PL UK
| | - Andinet Ejigu
- Department of Chemistry, University of Manchester Oxford Road Manchester M13 9PL UK +44 (0)161-275-4598
- National Graphene Institute, University of Manchester Oxford Road M13 9PL UK
| | - Robert A W Dryfe
- Department of Chemistry, University of Manchester Oxford Road Manchester M13 9PL UK +44 (0)161-275-4598
- National Graphene Institute, University of Manchester Oxford Road M13 9PL UK
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6
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Matsubara Y. Solvent Effect on Ferrocenium/Ferrocene Redox Couple as an Internal Standard in Acetonitrile and a Room-temperature Ionic Liquid. CHEM LETT 2020. [DOI: 10.1246/cl.190722] [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)
- Yasuo Matsubara
- Department of Material and Life Chemistry, Kanagawa University, Rokkakubashi, Yokohama, Kanagawa 221-8686, Japan
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7
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Tayade S, Patil K, Sharma G, Patil P, Mane RM, Mahulikar P, Sharma KKK. Electrochemical investigations of thymine and thymidine in 1-butyl-3-methyl imidazolium tetrafluoroborate ionic liquids at room temperature. CHEMICAL PAPERS 2019. [DOI: 10.1007/s11696-019-00777-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Graphene enhanced transformation of lignin in laccase-ABTS system by accelerating electron transfer. Enzyme Microb Technol 2018; 119:17-23. [DOI: 10.1016/j.enzmictec.2018.08.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 07/25/2018] [Accepted: 08/17/2018] [Indexed: 02/03/2023]
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9
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Chakraborty M, Ahmed T, Dhale RS, Majhi D, Sarkar M. Understanding the Microscopic Behavior of Binary Mixtures of Ionic Liquids through Various Spectroscopic Techniques. J Phys Chem B 2018; 122:12114-12130. [DOI: 10.1021/acs.jpcb.8b09699] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Manjari Chakraborty
- School of Chemical Sciences, National Institute of Science Education and Research, Bhubaneswar 751005, India
| | - Tasnim Ahmed
- Department of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - Ranu Satish Dhale
- School of Chemical Sciences, National Institute of Science Education and Research, Bhubaneswar 751005, India
| | - Debashis Majhi
- School of Chemical Sciences, National Institute of Science Education and Research, Bhubaneswar 751005, India
| | - Moloy Sarkar
- School of Chemical Sciences, National Institute of Science Education and Research, Bhubaneswar 751005, India
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10
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Majhi D, Seth S, Sarkar M. Differences in the behavior of dicationic and monocationic ionic liquids as revealed by time resolved-fluorescence, NMR and fluorescence correlation spectroscopy. Phys Chem Chem Phys 2018; 20:7844-7856. [PMID: 29508863 DOI: 10.1039/c7cp08630j] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
With an aim to understand the behavior in terms of the intermolecular interactions, structure and dynamics of dicationic and monocationic ionic liquids (ILs), two imidazolium-based dicationic ionic liquids (DILs), 1,8-bis-(3-methylimidazolium-1-yl)octane bis-(trifluoromethylsulfonyl)amide ([C8(mim)2][NTf2]2), 1,9-bis-(3-methylimidazolium-1-yl)nonane bis-(trifluoromethylsulfonyl)amide ([C9(mim)2][NTf2]2), and one monocationic ionic liquid (MIL), 1-butyl-3-methyl imidazolium bis(trifluoromethylsulfonyl)amide ([C4(mim)][NTf2]), have been investigated through combined fluorescence, electron paramagnetic resonance (EPR), NMR and fluorescence correlation spectroscopy (FCS). The DILs were synthesized by following a standard synthetic protocol and subsequently characterized by different analytical techniques. Steady state absorption, emission and EPR spectroscopic data reveal that DILs are less polar compared to MIL. The polarities of the DILs and MIL were found to be close to those of acetonitrile and short chain alcohols, respectively. The excitation wavelength dependent emission data reveals that DILs are more micro-heterogeneous in nature than MIL. The rotational diffusion of two organic solutes, perylene and 8-methoxypyrene-1,3,6-sulfonate (MPTS), were examined in the DILs and MIL. The rotational diffusion data for perylene and MPTS were analyzed in light of the Stokes-Einstein-Debye (SED) hydrodynamic theory. The rotation of perylene in the DILs was observed to be relatively faster to that in the MIL, and it goes beyond the limit predicted by the SED theory. In order to explain the rotational motion of perylene in DILs, the data was analyzed further by invoking quasi-hydrodynamic theory. The observed rotational behavior of perylene has been explained by considering the fact that perylene is located in the nonpolar region of ILs, and larger solvent molecules (DILs) induce a lower friction to the rotating solute. Interestingly, unlike perylene, rotations of MPTS in both of the ILs were observed to be much hindered indicating a relatively stronger MPTS-IL interaction than perylene-IL interaction. More interestingly, rotation of MPTS was observed to be faster in the DILs than that in the MIL despite the fact that DILs are more viscous than MILs. Relatively faster rotation of MPTS in DILs has been explained by resorting to NMR and FCS studies. The outcomes of the NMR and FCS studies revealed that DILs in the experimental condition exist in their folded form and because of this structural restriction of DILs it becomes difficult for the bulky MPTS to make stronger hydrogen bonding interactions with DILs, which eventually makes the rotation of MPTS in DILs faster. Essentially, the outcomes of all of these studies have demonstrated that the behavior of DILs is quite different to that of the usual MILs.
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Affiliation(s)
- Debashis Majhi
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI, P.O. Jatni, Khurda 752050, Bhubaneswar, Odisha, India.
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11
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Eshtaya M, Ejigu A, Stephens G, Walsh DA, Chen GZ, Croft AK. Developing energy efficient lignin biomass processing - towards understanding mediator behaviour in ionic liquids. Faraday Discuss 2018; 190:127-45. [PMID: 27228384 DOI: 10.1039/c5fd00226e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Environmental concerns have brought attention to the requirement for more efficient and renewable processes for chemicals production. Lignin is the second most abundant natural polymer, and might serve as a sustainable resource for manufacturing fuels and aromatic derivatives for the chemicals industry after being depolymerised. In this work, the mediator 2,2'-azino-bis(3-ethylbenthiazoline-6-sulfonic acid) diammonium salt (ABTS), commonly used with enzyme degradation systems, has been evaluated by means of cyclic voltammetry (CV) for enhancing the oxidation of the non-phenolic lignin model compound veratryl alcohol and three types of lignin (organosolv, Kraft and lignosulfonate) in the ionic liquid 1-ethyl-3-methylimidazolium ethyl sulfate, ([C2mim][C2SO4]). The presence of either veratryl alcohol or organosolv lignin increased the second oxidation peak of ABTS under select conditions, indicating the ABTS-mediated oxidation of these molecules at high potentials in [C2mim][C2SO4]. Furthermore, CV was applied as a quick and efficient way to explore the impact of water in the ABTS-mediated oxidation of both organosolv and lignosulfonate lignin. Higher catalytic efficiencies of ABTS were observed for lignosulfonate solutions either in sodium acetate buffer or when [C2mim][C2SO4] (15 v/v%) was present in the buffer solution, whilst there was no change found in the catalytic efficiency of ABTS in [C2mim][C2SO4]-lignosulfonate mixtures relative to ABTS alone. In contrast, organosolv showed an initial increase in oxidation, followed by a significant decrease on increasing the water content of a [C2mim][C2SO4] solution.
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Affiliation(s)
- Majd Eshtaya
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK.
| | - Andinet Ejigu
- Department of Chemistry, University of Nottingham, Nottingham NG7 2RD, UK
| | - Gill Stephens
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK.
| | - Darren A Walsh
- Department of Chemistry, University of Nottingham, Nottingham NG7 2RD, UK
| | - George Z Chen
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK. and Department of Chemical and Environmental Engineering, Faculty of Science & Engineering, University of Nottingham Ningbo China, Ningbo 315100, P. R. China
| | - Anna K Croft
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK.
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12
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The enhanced electronic communication in ferrocenemethanol molecular cluster based on intermolecular hydrogen-bonding. CHINESE CHEM LETT 2018. [DOI: 10.1016/j.cclet.2017.06.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Bhat MA, Ingole PP, Randriamahazaka H. Towards Understanding the Solvent-Dynamic Control of the Transport and Heterogeneous Electron-Transfer Processes in Ionic Liquids. Chemphyschem 2017; 18:415-426. [PMID: 27922206 DOI: 10.1002/cphc.201600442] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 12/01/2016] [Indexed: 12/24/2022]
Abstract
The impact of temperature-induced changes in solvent dynamics on the diffusion coefficient and standard rate constant k0 for heterogeneous electron transfer (ET) of ethylferrocene (EFc) in 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6 ]) is investigated. The results are analysed to understand the impact of solvent-dynamic control, solute-solvent interactions and solvent friction on the transport of redox probes and k0 . Concentration dependence of the diffusion coefficient of EFc in [BMIM][PF6 ] is observed. This is attributed to the solute-induced enhancement of the structural organisation of the ionic liquid (IL), which is supported by the concentration-dependent UV/Vis absorption and photoluminescence responses of EFc/[BMIM][PF6 ] solutions. Similar values of the activation energies for mass transport and ET and a linear relationship between the diffusion coefficient and the heterogeneous ET rate is observed. The ratio between the diffusion coefficient and the heterogeneous rate constant allows a characteristic length Ld , which is temperature-independent, to be introduced. The presented results clearly establish that mass transport and heterogeneous ET of redox probes are strongly correlated in ILs. It is proposed that the apparent kinetics of heterogeneous ET reactions in ILs can be explained in terms of their impact on thermal equilibration, energy dissipation and thermal excitation of redox-active probes.
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Affiliation(s)
- Mohsin Ahmad Bhat
- Department of Chemistry, University of Pune, Ganeshkhind, Pune, 411007, India), Fax: (+91) 194-2414049, E-mail
| | - Pravin P Ingole
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
| | - Hyacinthe Randriamahazaka
- Université Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086 CNRS, 15 rue Jean-Antoine de Baïf, 75205, Paris Cedex 13, France
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14
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Kadimisetty K, Mosa IM, Malla S, Satterwhite-Warden JE, Kuhns TM, Faria RC, Lee NH, Rusling JF. 3D-printed supercapacitor-powered electrochemiluminescent protein immunoarray. Biosens Bioelectron 2016; 77:188-93. [PMID: 26406460 PMCID: PMC4673015 DOI: 10.1016/j.bios.2015.09.017] [Citation(s) in RCA: 129] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 09/04/2015] [Accepted: 09/10/2015] [Indexed: 11/22/2022]
Abstract
Herein we report a low cost, sensitive, supercapacitor-powered electrochemiluminescent (ECL) protein immunoarray fabricated by an inexpensive 3-dimensional (3D) printer. The immunosensor detects three cancer biomarker proteins in serum within 35 min. The 3D-printed device employs hand screen printed carbon sensors with gravity flow for sample/reagent delivery and washing. Prostate cancer biomarker proteins, prostate specific antigen (PSA), prostate specific membrane antigen (PSMA) and platelet factor-4 (PF-4) in serum were captured on the antibody-coated carbon sensors followed by delivery of detection-antibody-coated Ru(bpy)3(2+) (RuBPY)-doped silica nanoparticles in a sandwich immunoassay. ECL light was initiated from RuBPY in the silica nanoparticles by electrochemical oxidation with tripropylamine (TPrA) co-reactant using supercapacitor power and ECL was captured with a CCD camera. The supercapacitor was rapidly photo-recharged between assays using an inexpensive solar cell. Detection limits were 300-500f gmL(-1) for the 3 proteins in undiluted calf serum. Assays of 6 prostate cancer patient serum samples gave good correlation with conventional single protein ELISAs. This technology could provide sensitive onsite cancer diagnostic tests in resource-limited settings with the need for only moderate-level training.
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Affiliation(s)
| | - Islam M Mosa
- Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA; Department of Chemistry, Tanta University, Tanta 31527, Egypt
| | - Spundana Malla
- Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA
| | | | - Tyler M Kuhns
- Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA
| | - Ronaldo C Faria
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, SP, Brazil
| | - Norman H Lee
- Department of Pharmacology & Physiology, George Washington University, Washington, DC, USA
| | - James F Rusling
- Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA; Department of Cell Biology, University of Connecticut Health Center, Farmington, CT 06032, USA; School of Chemistry, National University of Ireland, Galway, Ireland; Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA.
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15
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Nanda R. Thermal dynamics of lithium salt mixtures of ionic liquid in water by PGSE NMR spectroscopy. RSC Adv 2016. [DOI: 10.1039/c6ra00891g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The dynamics of ionic liquid–H2O–Li+ salt mixtures have been studied through PGSE NMR spectroscopy.
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Affiliation(s)
- Raju Nanda
- School of Chemical Sciences
- National Institute of Science Education and Research
- Bhubaneswar-751005
- India
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16
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Kumar Sahu P, Ghosh A, Sarkar M. Understanding Structure-Property Correlation in Monocationic and Dicationic Ionic Liquids through Combined Fluorescence and Pulsed-Field Gradient (PFG) and Relaxation NMR Experiments. J Phys Chem B 2015; 119:14221-35. [PMID: 26447540 DOI: 10.1021/acs.jpcb.5b07357] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Steady state, time-resolved fluorescence and NMR experiments are carried out to gain deeper insights into the structure-property correlation in structurally similar monocationic and dicationic room-temperature ionic liquids (RTILs). The excitation wavelength dependent fluorescence response of fluorophore in 1-methy-3-propyllimidazolium bis(trifluoromethylsulfonyl)amide [C3MIm][NTf2] is found to be different from that of 1,6-bis(3-methylimidazolium-1-yl)hexane bis(trifluoromethylsulfonyl)amide [C6(MIm)2][NTf2]2 and 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide [C6MIm][NTf2]. The outcomes of the present solvent dynamics study in [C3MIm][NTf2] when compared with those in [C6(MIm)2][NTf2]2 and in [C6MIm][NTf2] from our previous studies (Phys. Chem. Chem. Phys. 2014, 16, 12918-12928) indicate the involvement of dipolar rotation of imidazolium cation during solvation. To correlate the findings of solvation dynamics study with the dipolar rotation of the imidazolium ring, pulsed-field gradient (PFG)-NMR technique for translational diffusion coefficient measurement and (1)H as well as (19)F spin-lattice relaxation measurements are employed. NMR investigation reveals that an ultrafast component of solvation can be related to the dipolar rotation of imidazolium cation; hence, the role of dipolar rotation of cations in governing the dynamics of solvation in ILs cannot be ignored. Analysis of the rotational relaxation dynamics data by the Stokes-Einstein-Debye hydrodynamic theory unveils distinctive features of solute-solvent interaction in [C3MIm][NTf2] and [C6(MIm)2][NTf2]2.
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Affiliation(s)
- Prabhat Kumar Sahu
- School of Chemical Sciences, National Institute of Science Education and Research , Bhubaneswar 751005, India
| | - Arindam Ghosh
- School of Chemical Sciences, National Institute of Science Education and Research , Bhubaneswar 751005, India
| | - Moloy Sarkar
- School of Chemical Sciences, National Institute of Science Education and Research , Bhubaneswar 751005, India
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Frezzato D, Bagno A, Castiglione F, Mele A, Saielli G. MD simulation of xenon in ionic liquids: Disentangling the cationic and anionic cage effects on the structural and dynamic properties. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.03.039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Ha THY, Rasmussen K, Landgraf S, Grampp G. Diffusion of tetrathiafulvalene and its radical cation in ionic liquids in comparison to conventional solvents. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.07.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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19
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Khazalpour S, Nematollahi D. Electrochemical study of Alamar Blue (resazurin) in aqueous solutions and room-temperature ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate at a glassy carbon electrode. RSC Adv 2014. [DOI: 10.1039/c3ra45800h] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Electrochemical behaviour of resazurin in aqueous buffered solutions and ionic liquid was studied. The orientation of adsorbed resazurin was estimated. It is found that, the orientation of the adsorbed resazurin at glassy carbon surface is edgewise.
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Porras Gutiérrez AG, Zeitouny J, Gomila A, Douziech B, Cosquer N, Conan F, Reinaud O, Hapiot P, Le Mest Y, Lagrost C, Le Poul N. Insights into water coordination associated with the CuII/CuI electron transfer at a biomimetic Cu centre. Dalton Trans 2014; 43:6436-45. [DOI: 10.1039/c3dt53548g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The coordination chemistry of an aqua Cu complex was investigated in non-coordinating solvents and in ionic liquids.
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Kaintz A, Baker G, Benesi A, Maroncelli M. Solute diffusion in ionic liquids, NMR measurements and comparisons to conventional solvents. J Phys Chem B 2013; 117:11697-708. [PMID: 23968276 DOI: 10.1021/jp405393d] [Citation(s) in RCA: 100] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Diffusion coefficients of a variety of dilute solutes in the series of 1-alkyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imides ([Prn1][Tf2N], n = 3, 4, 6, 8, and 10), trihexyltetracedecylphosphonium bis(trifluoromethanesulfonyl)imide [P14,666][Tf2N], and assorted imidazolium ionic liquids are measured using pulsed field gradient (1)H NMR. These data, combined with available literature data, are used to try to uncover the solute and solvent characteristics most important in determining tracer diffusion rates. Discussion is framed in terms of departures from simple hydrodynamic predictions for translational friction using the ratio ζobs/ζSE, where ζobs is the observed friction, determined from the measured diffusion coefficient D via ζobs = kBT/D, and ζSE = 6πηR is the Stokes friction on a sphere of radius R (determined from the solute van der Waals volume) in a solvent with viscosity η. In the case of neutral solutes, the primary determinant of whether hydrodynamic predictions are accurate is the relative size of solute versus solvent molecules. A single correlation, albeit with considerable scatter, is found between ζobs/ζSE and the ratio of solute-to-solvent van der Waals volumes, ζobs/ζSE = {1 + a(VU/VV)(-p)}, with constants a = 1.93 and p = 1.88. In the case of small solutes, the observed friction is over 100-fold smaller than predictions of hydrodynamic models. The dipole moment of the solute has little effect on the friction, whereas solute charge has a marked effect. For monovalent solutes of size comparable to or smaller than the solvent ions, the observed friction is comparable to or even greater than what is predicted by hydrodynamics. These general trends are shown to be quite similar to what is observed for tracer diffusion in conventional solvents.
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Affiliation(s)
- Anne Kaintz
- Department of Chemistry, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
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22
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Yang Y, Yu L. Theoretical investigations of ferrocene/ferrocenium solvation in imidazolium-based room-temperature ionic liquids. Phys Chem Chem Phys 2013; 15:2669-83. [DOI: 10.1039/c2cp42876h] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Walsh DA, Ejigu A, Smith J, Licence P. Kinetics and mechanism of oxygen reduction in a protic ionic liquid. Phys Chem Chem Phys 2013; 15:7548-54. [DOI: 10.1039/c3cp44669g] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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24
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Beichel W, Yu Y, Dlubek G, Krause-Rehberg R, Pionteck J, Pfefferkorn D, Bulut S, Bejan D, Friedrich C, Krossing I. Free volume in ionic liquids: a connection of experimentally accessible observables from PALS and PVT experiments with the molecular structure from XRD data. Phys Chem Chem Phys 2013; 15:8821-30. [DOI: 10.1039/c3cp43306d] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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25
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Scharf NT, Stark A, Hoffmann MM. Ion Pairing and Dynamics of the Ionic Liquid 1-Hexyl-3-methylimidazolium Bis(irifluoromethylsulfonyl)amide ([C6mim][NTf2]) in the Low Dielectric Solvent Chloroform. J Phys Chem B 2012; 116:11488-97. [DOI: 10.1021/jp3047592] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nathan T. Scharf
- Department of Chemistry, The
College at Brockport, State University of New York, Brockport, New York 14420, United States
| | - Annegret Stark
- Institute for Industrial Chemistry, University of Leipzig, Linnéstrasse 3-4, 04107
Leipzig, Germany
| | - Markus M. Hoffmann
- Department of Chemistry, The
College at Brockport, State University of New York, Brockport, New York 14420, United States
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Cornut R, Poirier S, Mauzeroll J. Forced convection during feedback approach curve measurements in scanning electrochemical microscopy: maximal displacement velocity with a microdisk. Anal Chem 2012; 84:3531-7. [PMID: 22385037 DOI: 10.1021/ac203047d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
In scanning electrochemical microscopy (SECM), an approach curve performed in feedback mode involves the downward displacement of a microelectrode toward a substrate while applying a bias to detect dissolved electroactive species at a diffusion-limited rate. The resulting measured current is said to be at steady state. In order to reduce the required measurement time, the approach velocity can be increased. In this paper, we investigate experimentally and theoretically the combination of diffusion and convection processes related to a moving microdisk electrode during feedback approaches. Transient modeling and numerical simulations with moving boundaries are performed, and the results are compared to the experimental approach curves obtained in aqueous solution. The geometry and misalignment of the microelectrode influence the experimental approach curves recorded at high approach velocities. The effects are discussed through the decomposition of the current into transient diffusional, radial convectional, and axial convectional contributions. Finally a ready-to-use expression is provided to rapidly evaluate the maximal approach velocity for steady state measurements as a function of the microelectrode geometry and the physical properties of the media. This expression holds for the more restrictive case of negative feedback as well as other modes, such as SECM approach curves performed at substrates displaying first order kinetics.
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Affiliation(s)
- R Cornut
- Department of Chemistry, NanoQAM Research Centre, Université du Québec à Montréal, Montréal, QC, Canada
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