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Dupont J, Leal BC, Lozano P, Monteiro AL, Migowski P, Scholten JD. Ionic Liquids in Metal, Photo-, Electro-, and (Bio) Catalysis. Chem Rev 2024; 124:5227-5420. [PMID: 38661578 DOI: 10.1021/acs.chemrev.3c00379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Ionic liquids (ILs) have unique physicochemical properties that make them advantageous for catalysis, such as low vapor pressure, non-flammability, high thermal and chemical stabilities, and the ability to enhance the activity and stability of (bio)catalysts. ILs can improve the efficiency, selectivity, and sustainability of bio(transformations) by acting as activators of enzymes, selectively dissolving substrates and products, and reducing toxicity. They can also be recycled and reused multiple times without losing their effectiveness. ILs based on imidazolium cation are preferred for structural organization aspects, with a semiorganized layer surrounding the catalyst. ILs act as a container, providing a confined space that allows modulation of electronic and geometric effects, miscibility of reactants and products, and residence time of species. ILs can stabilize ionic and radical species and control the catalytic activity of dynamic processes. Supported IL phase (SILP) derivatives and polymeric ILs (PILs) are good options for molecular engineering of greener catalytic processes. The major factors governing metal, photo-, electro-, and biocatalysts in ILs are discussed in detail based on the vast literature available over the past two and a half decades. Catalytic reactions, ranging from hydrogenation and cross-coupling to oxidations, promoted by homogeneous and heterogeneous catalysts in both single and multiphase conditions, are extensively reviewed and discussed considering the knowledge accumulated until now.
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Affiliation(s)
- Jairton Dupont
- Institute of Chemistry - Universidade Federal do Rio Grande do Sul - UFRGS, Avenida Bento Gonçalves, 9500, Porto Alegre 91501-970 RS, Brasil
- Departamento de Bioquímica y Biología Molecular B e Inmunología, Facultad de Química, Universidad de Murcia, P.O. Box 4021, E-30100 Murcia, Spain
| | - Bárbara C Leal
- Institute of Chemistry - Universidade Federal do Rio Grande do Sul - UFRGS, Avenida Bento Gonçalves, 9500, Porto Alegre 91501-970 RS, Brasil
| | - Pedro Lozano
- Departamento de Bioquímica y Biología Molecular B e Inmunología, Facultad de Química, Universidad de Murcia, P.O. Box 4021, E-30100 Murcia, Spain
| | - Adriano L Monteiro
- Institute of Chemistry - Universidade Federal do Rio Grande do Sul - UFRGS, Avenida Bento Gonçalves, 9500, Porto Alegre 91501-970 RS, Brasil
| | - Pedro Migowski
- Institute of Chemistry - Universidade Federal do Rio Grande do Sul - UFRGS, Avenida Bento Gonçalves, 9500, Porto Alegre 91501-970 RS, Brasil
| | - Jackson D Scholten
- Institute of Chemistry - Universidade Federal do Rio Grande do Sul - UFRGS, Avenida Bento Gonçalves, 9500, Porto Alegre 91501-970 RS, Brasil
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2
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Zhang WD, Li Y, Wang K, Yue Y, Tie M, Gu XJ, Xue YL. Effect of different ionic liquids and organic solvents on the structural and physicochemical properties of cellulose-protein complexes extracted from Se-enriched peanut leaves. Int J Biol Macromol 2022; 217:171-179. [PMID: 35835299 DOI: 10.1016/j.ijbiomac.2022.07.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 06/28/2022] [Accepted: 07/07/2022] [Indexed: 11/15/2022]
Abstract
Abundant cellulose and insoluble protein were contained in the Se-enriched peanut leaf residue, a by-product from leaf protein extraction. Ionic liquids (ILs) were used to extract the cellulose-protein complexes (CPCs) from Se-enriched peanut leaf residue. The effects of various ILs as extractants and organic solvents as regenerant on the physicochemical properties of CPCs were compared. The results showed that the yield of CPCs and recovery yield of [AMIM]Cl (1-allyl-3-methylimidazole chloride) were better than those of [BMIM]Cl (1-butyl-3-methylimidazolium chloride). Simultaneously, it could be seen from the infrared absorption peaks and secondary structure fitting results that [BMIM]Cl seemed stronger than [AMIM]Cl in destroying the secondary structure of CPCs. Scanning electron microscope (SEM) showed that the CPCs extracted by [BMIM]Cl were lamellate with holes on the surface, and the CPCs extracted by [AMIM]Cl were rough, almost without holes on the surface. Furthermore, the transmittance and tensile strength of the film which contained BA-CPC ([BMIM]Cl as extractant and acetonitrile as regenerant) film were better than those contained AA-CPC ([AMIM]Cl as extractant and acetonitrile as regenerant) film, which might be mainly because the types of ILs and regenerants affect the particle size of CPCs, thereby influencing the mechanical properties of the film.
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Affiliation(s)
- Wei-Dong Zhang
- College of Light Industry, Liaoning University, Shenyang 110036, PR China
| | - Yan Li
- College of Light Industry, Liaoning University, Shenyang 110036, PR China
| | - Ke Wang
- College of Light Industry, Liaoning University, Shenyang 110036, PR China
| | - Ye Yue
- College of Light Industry, Liaoning University, Shenyang 110036, PR China
| | - Mei Tie
- College of Environment, Liaoning University, Shenyang 110036, PR China
| | - Xue-Jun Gu
- Institute of Rare and Scattered Elements, Liaoning University, Shenyang 110036, PR China
| | - You-Lin Xue
- College of Light Industry, Liaoning University, Shenyang 110036, PR China.
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SebtAhmadi S, Raissi B, Yaghmaee MS, Riahifar R, Rahimisheikh S. Effect of electrode pores on the performance of CO electrochemical gas sensor, experimental and modeling. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Li N, Liu X, Zhu J, Zhou B, Jing J, Wang A, Xu R, Wen Z, Shi X, Guo S. Simple and sensitive detection of acrylamide based on hemoglobin immobilization in carbon ionic liquid paste electrode. Food Control 2020. [DOI: 10.1016/j.foodcont.2019.106764] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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5
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Zhao Q, Chu H, Zhao B, Liang Z, Zhang L, Zhang Y. Advances of ionic liquids-based methods for protein analysis. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.09.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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6
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Bhattacharya G, Giri RP, Dubey A, Mitra S, Priyadarshini R, Gupta A, Mukhopadhyay MK, Ghosh SK. Structural changes in cellular membranes induced by ionic liquids: From model to bacterial membranes. Chem Phys Lipids 2018; 215:1-10. [PMID: 29944866 DOI: 10.1016/j.chemphyslip.2018.06.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 06/16/2018] [Accepted: 06/18/2018] [Indexed: 12/19/2022]
Abstract
Ionic liquids (ILs) have generated considerable attention recently because of their cytotoxicity and application as antibiotics. However, the mechanism of how they damage cell membranes is not currently well understood. In this paper, the antibacterial activities of two imidazolium-based ILs, namely 1-butyl- 3-methylimidazolium tetrafluroborate ([BMIM][BF4]) and 1-ethyl- 3-methylimidazolium tetrafluroborate ([EMIM][BF4]) have been investigated. The activity of [BMIM][BF4] on gram negative bacteria E. coli is observed to be stronger compared with the short chained [EMIM][BF4]. To explain this observation, the effects of these ILs on the self-assembled structures of model cellular membranes have been investigated. The in-plane elasticity of a monolayer formed at air-water interface by 1,2-dipalmitoyl- sn-glycero- 3-phosphocholine (DPPC) lipids was reduced in the presence of the ILs. The x-ray reflectivity studies on polymer supported lipid bilayer have shown the bilayer to shrink and correspondingly exhibit an increase in electron density. The presence of a certain mol% of negatively charged lipid, 1,2-dipalmitoyl-rac-glycero-3-phospho-L-serine (DPPS), in DPPC mono- and bi-layers enhances the effect considerably.
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Affiliation(s)
- G Bhattacharya
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - R P Giri
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics, Bidhannagar, Kolkata, 700064, India
| | - A Dubey
- Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - S Mitra
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - R Priyadarshini
- Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - A Gupta
- Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - M K Mukhopadhyay
- Surface Physics and Material Science Division, Saha Institute of Nuclear Physics, Bidhannagar, Kolkata, 700064, India
| | - S K Ghosh
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India.
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Singh UK, Patel R. Dynamics of Ionic Liquid-Assisted Refolding of Denatured Cytochrome c: A Study of Preferential Interactions toward Renaturation. Mol Pharm 2018; 15:2684-2697. [PMID: 29767978 DOI: 10.1021/acs.molpharmaceut.8b00212] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In vitro refolding of denatured protein and the influence of the alkyl chain on the refolding of a protein were tested using long chain imidazolium chloride salts, 1-methyl-3-octylimidazolium chloride [C8mim][Cl], and 1-decyl-3-methylimidazolium chloride [C10mim][Cl]. The horse heart cytochrome c (h-cyt c) was denatured by urea and guanidinium hydrochloride (GdnHCl), as well as by base-induced denaturation at pH 13, to provide a broad overview of the overall refolding behavior. The variation in the alkyl chain of the ionic liquids (ILs) showed a profound effect on the refolding of denatured h-cyt c. The ligand-induced refolding was correlated to understand the mechanism of the conformational stability of proteins in aqueous solutions of ILs. The results showed that the long chain ILs having the [C8mim]+ and [C10mim]+ cations promote the refolding of alkali-denatured h-cyt c. The IL having the [C10mim]+ cation efficiently refolded the alkali-denatured h-cyt c with the formation of the MG state, whereas the IL having the [C8mim]+ cation, which is known to be compatible for protein stability, shows slight refolding and forms a different transition state. The lifetime results show successful refolding of alkaline-denatured h-cyt c by both of the ILs, however, more refolding was observed in the case of [C10mim][Cl], and this was correlated with the fast and medium lifetimes (τ1 and τ2) obtained, which show an increase accompanied by an increase in secondary structure. The hydrophobic interactions plays an important role in the refolding of chemically and alkali-denatured h-cyt c by long chain imidazolium ILs. The formation of the MG state by [C10mim][Cl] was also confirmed, as some regular structure exists far below the CMC of IL. The overall results suggested that the [C10mim]+ cation bound to the unfolded h-cyt c triggers its refolding by electrostatic and hydrophobic interactions that stabilize the MG state.
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Affiliation(s)
- Upendra Kumar Singh
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences , Jamia Millia Islamia (A Central University) , New Delhi 110025 , India
| | - Rajan Patel
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences , Jamia Millia Islamia (A Central University) , New Delhi 110025 , India
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Bhattacharya G, Mitra S, Mandal P, Dutta S, Giri RP, Ghosh SK. Thermodynamics of interaction of ionic liquids with lipid monolayer. Biophys Rev 2018; 10:709-719. [PMID: 29305702 DOI: 10.1007/s12551-017-0390-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 12/13/2017] [Indexed: 11/29/2022] Open
Abstract
Understanding the interaction of ionic liquids with cellular membrane becomes utterly important to comprehend the activities of these liquids in living organisms. Lipid monolayer formed at the air-water interface is employed as a model system to follow this interaction by investigating important thermodynamic parameters. The penetration kinetics of the imidazolium-based ionic liquid 1-decyl-3-methylimidazolium tetrafluoroborate ([DMIM][BF4]) into the zwitterionic 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) lipid layer is found to follow the Boltzmann-like equation that reveals the characteristic time constant which is observed to be the function of initial surface pressure. The enthalpy and entropy calculated from temperature-dependent pressure-area isotherms of the monolayer show that the added ionic liquids bring about a disordering effect in the lipid film. The change in Gibbs free energy indicates that an ionic liquid with longer chain has a far greater disordering effect compared to an ionic liquid with shorter chain. The differential scanning calorimetric measurement on a multilamellar vesicle system shows the main phase transition temperature to shift to a lower value, which, again, indicates the disordering effect of the ionic liquid on lipid membrane. All these studies fundamentally point out that, when ionic liquids interact with lipid molecules, the self-assembled structure of a cellular membrane gets perturbed, which may be the mechanism of these molecules having adverse effects on living organisms.
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Affiliation(s)
- G Bhattacharya
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - S Mitra
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - P Mandal
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - S Dutta
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India
| | - R P Giri
- Saha Institute of Nuclear Physics, Bidhannagar, Kolkata, 700064, India
| | - S K Ghosh
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh, 201314, India.
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9
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Matias SC, Lourenço NMT, Fonseca LJP, Cordas CM. Comparative Electrochemical Behavior of Cytochrome c
on Aqueous Solutions Containing Choline-Based Room Temperature Ionic Liquids. ChemistrySelect 2017. [DOI: 10.1002/slct.201702052] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Sara C. Matias
- iBB - Institute for Bioengineering and Biosciences; Department of Bioengineering; Instituto Superior Técnico; Universidade de Lisboa; Avenida Rovisco Pais 1049-001 Lisbon Portugal
| | - Nuno M. T. Lourenço
- iBB - Institute for Bioengineering and Biosciences; Department of Bioengineering; Instituto Superior Técnico; Universidade de Lisboa; Avenida Rovisco Pais 1049-001 Lisbon Portugal
| | - Luis J. P. Fonseca
- iBB - Institute for Bioengineering and Biosciences; Department of Bioengineering; Instituto Superior Técnico; Universidade de Lisboa; Avenida Rovisco Pais 1049-001 Lisbon Portugal
| | - Cristina M. Cordas
- UCIBIO, REQUIMTE; Departamento de Química; Faculdade de Ciência e Tecnologia; Universidade Nova de Lisboa; 2819-516 Caparica Portugal
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Vidanapathirana P, Hasan F, Mussio K, Pande A, Brands M, Siraj N, Grove A, Warner IM. Cationic ionic liquid surfactant-polyacrylamide gel electrophoresis for enhanced separation of acidic and basic proteins with single-step ribonuclease b glycoforms separation. J Chromatogr A 2017; 1515:245-251. [DOI: 10.1016/j.chroma.2017.07.083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 07/26/2017] [Accepted: 07/27/2017] [Indexed: 10/19/2022]
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11
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Kumar A, Bisht M, Venkatesu P. Biocompatibility of ionic liquids towards protein stability: A comprehensive overview on the current understanding and their implications. Int J Biol Macromol 2017; 96:611-651. [DOI: 10.1016/j.ijbiomac.2016.12.005] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/02/2016] [Accepted: 12/04/2016] [Indexed: 10/20/2022]
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Dong X, Fan Y, Yang P, Kong J, Li D, Miao J, Hua S, Hu C. Ultraviolet-Visible (UV-Vis) and Fluorescence Spectroscopic Investigation of the Interactions of Ionic Liquids and Catalase. APPLIED SPECTROSCOPY 2016; 70:1851-1860. [PMID: 27324424 DOI: 10.1177/0003702816653124] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Accepted: 03/22/2016] [Indexed: 06/06/2023]
Abstract
The inhibitory effects of nine ionic liquids (ILs) on the catalase activity were investigated using fluorescence, absorption ultraviolet-visible spectroscopy. The interactions of ILs and catalase on the molecular level were studied. The experimental results indicated that ILs could inhibit the catalase activity and their inhibitory abilities depended on their chemical structures. Fluorescence experiments showed that hydrogen bonding played an important role in the interaction process. The inhibitory abilities of ILs on catalase activity could be simply described by their hydrophobicity and hydrogen bonding abilities. Unexpected less inhibitory effects of trifluoromethanesulfonate (TfO-) might be ascribed to its larger size, which makes it difficult to go through the substrate channel of catalase to the active site.
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Affiliation(s)
- Xing Dong
- College of Physics and Chemistry, Henan Polytechnic University, China
| | - Yunchang Fan
- College of Physics and Chemistry, Henan Polytechnic University, China
| | - Peng Yang
- College of Physics and Chemistry, Henan Polytechnic University, China
| | - Jichuan Kong
- College of Physics and Chemistry, Henan Polytechnic University, China
| | - Dandan Li
- College of Physics and Chemistry, Henan Polytechnic University, China
| | - Juan Miao
- College of Physics and Chemistry, Henan Polytechnic University, China
| | - Shaofeng Hua
- College of Physics and Chemistry, Henan Polytechnic University, China
| | - Chaobing Hu
- College of Physics and Chemistry, Henan Polytechnic University, China
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Xiao F, Yue L, Li S, Li X. Conjugation of cytochrome c with ferrocene-terminated hyperbranched polymer and its influence on protein structure, conformation and function. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 162:69-74. [PMID: 26978787 DOI: 10.1016/j.saa.2016.03.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 03/03/2016] [Accepted: 03/04/2016] [Indexed: 06/05/2023]
Abstract
Interaction mechanism of a new hyperbranched polyurethane-based ferrocene (HPU-Fc) with cytochrome c (cyt c) and cyt c structure and conformation change induced by HPU-Fc were investigated using cyclic voltammogram(CV), differential pulse voltammetry (DPV), circular dichroism (CD), fluorescence, synchronous fluorescence and absorbance spectroscopy technique. The peroxidase activity of cyt c in the presence of HPU-Fc was also studied. The structure and conformation of protein are relatively stable at moderate concentration of HPU-Fc without obvious perturbation of the heme pocket and significant changes in protein secondary structure. Conjugation of cyt c with excessive HPU-Fc (over about 3 times of cyt c) slightly changed the α-helix structure in protein, disturbed the microenvironment around heme as well as away from the heme crevice, which caused the changes of the electrochemical behavior and the absorption spectra. Reasonable amount of HPU-Fc has no significant influence on the protein enzymatic activity, while excess HPU-Fc may cause a conformation not suitable for H2O2 activation and guaiacol oxidation. The interaction of HPU-Fc with cyt c and the conservation of protein function at suitable HPU-Fc amount make prepared complex promising for the synergistic anticancer therapy.
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Affiliation(s)
- Fengjuan Xiao
- School of Material Science and Engineering, Shijiazhuang Tiedao University, Hebei Provincial Key Laboratory of Traffic Engineering Materials, No. 17 North 2nd-Ring East Road, Shijiazhuang 050043, Hebei Province, China.
| | - Lin Yue
- School of Material Science and Engineering, Shijiazhuang Tiedao University, Hebei Provincial Key Laboratory of Traffic Engineering Materials, No. 17 North 2nd-Ring East Road, Shijiazhuang 050043, Hebei Province, China.
| | - Song Li
- School of Material Science and Engineering, Shijiazhuang Tiedao University, Hebei Provincial Key Laboratory of Traffic Engineering Materials, No. 17 North 2nd-Ring East Road, Shijiazhuang 050043, Hebei Province, China.
| | - Xinxin Li
- School of Material Science and Engineering, Shijiazhuang Tiedao University, Hebei Provincial Key Laboratory of Traffic Engineering Materials, No. 17 North 2nd-Ring East Road, Shijiazhuang 050043, Hebei Province, China.
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Abo-Hamad A, AlSaadi MA, Hayyan M, Juneidi I, Hashim MA. Ionic Liquid-Carbon Nanomaterial Hybrids for Electrochemical Sensor Applications: a Review. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.02.044] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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15
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Leonida MD, Aurian-Blajeni B. Molecularly "wired" cholesterol oxidase for biosensing. Protein J 2015; 34:68-72. [PMID: 25579496 DOI: 10.1007/s10930-015-9599-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The influence of several factors on the activity of cholesterol oxidase (ChOx) transiently exposed to a room temperature ionic liquid (RTIL) was studied. Presence of flavin adenine dinucleotide (FAD, prosthetic group of ChOx) during exposure to RTIL makes the procedure enzyme-friendly, while the use of RTIL (green reagent) makes it environmentally-friendly. Following exposure to RTIL and its subsequent removal, FAD becomes part of the molecular structure of the refolded protein (a molecular "wire"). This makes the procedure used here a molecular one. The factors studied were: FAD presence in RTIL during modification, water presence during exposure to RTIL, and ratio FAD:RTIL during "wiring". Performance parameters monitored were: enzyme activity before and after "wiring" (expressed as (dA/dt)/mg enzyme, and measured spectrophotometrically), peak current in an amperometric biosensor for cholesterol detection, and linearity of the biosensor response depending on cholesterol concentration. After RTIL removal, the modified enzyme (ME) retained a high percentage of the added FAD, which supplemented that of the native enzyme (functioning as a "wire" and enhancing electron transfer kinetics), and a fraction of the initial activity. Used in an amperometric biosensor, ME showed catalytic activity, linear behavior as a function of cholesterol concentration, and stability.
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Affiliation(s)
- Mihaela D Leonida
- Fairleigh Dickinson University, Metropolitan Campus, 1000 River Rd., Teaneck, NJ, 07666, USA,
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16
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Wang XF, Zhang Y, Shu Y, Chen XW, Wang JH. Ionic liquid poly(3-n-dodecyl-1-vinylimidazolium) bromide as an adsorbent for the sorption of hemoglobin. RSC Adv 2015. [DOI: 10.1039/c5ra00036j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel polymeric ionic liquid, poly(1-vinylimidazolium-3-n-dodecyl) bromide, exhibits selective adsorption of hemoglobin from human whole blood.
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Affiliation(s)
- Xiao-Feng Wang
- Research Center for Analytical Sciences
- Colleges of Sciences
- Northeastern University
- Shenyang
- China
| | - Yue Zhang
- Research Center for Analytical Sciences
- Colleges of Sciences
- Northeastern University
- Shenyang
- China
| | - Yang Shu
- College of Life and Health Science
- Northeastern University
- Shenyang 110189
- China
| | - Xu-Wei Chen
- Research Center for Analytical Sciences
- Colleges of Sciences
- Northeastern University
- Shenyang
- China
| | - Jian-Hua Wang
- Research Center for Analytical Sciences
- Colleges of Sciences
- Northeastern University
- Shenyang
- China
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17
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Benedetto A, Heinrich F, Gonzalez MA, Fragneto G, Watkins E, Ballone P. Structure and Stability of Phospholipid Bilayers Hydrated by a Room-Temperature Ionic Liquid/Water Solution: A Neutron Reflectometry Study. J Phys Chem B 2014; 118:12192-206. [DOI: 10.1021/jp507631h] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Antonio Benedetto
- School
of Physics, University College Dublin−UCD, Belfield Campus, Dublin 4, Ireland
| | - Frank Heinrich
- Department
of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Center
for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | | | | | - Erik Watkins
- Institute Laue-Langevin, Grenoble, France
- Lujan
Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Pietro Ballone
- Center
for Life Nano Science @Sapienza, Istituto Italiano di Tecnologia (IIT), 00161 Roma, Italy
- Department
of Physics, Universita’ di Roma “La Sapienza”, 00185 Roma, Italy
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Wang T, Wang L, Tu J, Xiong H, Wang S. Direct electrochemistry and electrocatalysis of heme proteins immobilised in carbon-coated nickel magnetic nanoparticle–chitosan–dimethylformamide composite films in room-temperature ionic liquids. Bioelectrochemistry 2013; 94:94-9. [DOI: 10.1016/j.bioelechem.2013.04.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2012] [Revised: 04/02/2013] [Accepted: 04/03/2013] [Indexed: 11/26/2022]
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Ding KQ, Wang QF, Zhao M. Cyclic Voltammograms of Ferrocene on Multi-Walled Carbon Nanotubes (MWCNTs)-Modified Edge Plane Pyrolytic Graphite (EPPG) Electrode in Room Temperature Ionic Liquids (RTILs) of 1-Ethyl-3-Methylimidazolium Tetrafluoroborate (EMIBF4). J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200700103] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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20
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Sarhangzadeh K, Khatami AA, Jabbari M, Bahari S. Simultaneous determination of diclofenac and indomethacin using a sensitive electrochemical sensor based on multiwalled carbon nanotube and ionic liquid nanocomposite. J APPL ELECTROCHEM 2013. [DOI: 10.1007/s10800-013-0609-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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21
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Chen T, Xiong H, Wen W, Zhang X, Wang S. Electrochemistry of heme proteins entrapped in DNA films in two imidazolium-based room temperature ionic liquids. Bioelectrochemistry 2013; 91:8-14. [DOI: 10.1016/j.bioelechem.2012.11.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Revised: 09/20/2012] [Accepted: 11/25/2012] [Indexed: 11/27/2022]
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22
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Lu L, Hu Y, Huang X, Qu Y. A Bioelectrochemical Method for the Quantitative Description of the Hofmeister Effect of Ionic Liquids in Aqueous Solution. J Phys Chem B 2012; 116:11075-80. [DOI: 10.1021/jp3054263] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lu Lu
- Key Laboratory of Colloid & Interface Chemistry of the Education Ministry of China, Shandong University, Jinan 250100, People's Republic of China
| | - Yan Hu
- Key Laboratory of Colloid & Interface Chemistry of the Education Ministry of China, Shandong University, Jinan 250100, People's Republic of China
| | - Xirong Huang
- Key Laboratory of Colloid & Interface Chemistry of the Education Ministry of China, Shandong University, Jinan 250100, People's Republic of China
- State Key Laboratory
of Microbial Technology of China, Shandong University, Jinan 250100, People's Republic of China
| | - Yinbo Qu
- State Key Laboratory
of Microbial Technology of China, Shandong University, Jinan 250100, People's Republic of China
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23
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Bingham RJ, Ballone P. Computational Study of Room-Temperature Ionic Liquids Interacting with a POPC Phospholipid Bilayer. J Phys Chem B 2012; 116:11205-16. [DOI: 10.1021/jp306126q] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Richard J. Bingham
- Centre for Molecular Nanoscience,
School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Pietro Ballone
- Centre Européen de Calcul
Atomique et Moléculaire, EPFL, Lausanne, Switzerland
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24
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Wang R, Jia D, Cao Y. Facile synthesis and enhanced electrocatalytic activities of organic–inorganic hybrid ionic liquid polyoxometalate nanomaterials by solid-state chemical reaction. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.04.011] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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25
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Dias AMA, Marceneiro S, Braga MEM, Coelho JFJ, Ferreira AGM, Simões PN, Veiga HIM, Tomé LC, Marrucho IM, Esperança JMSS, Matias AA, Duarte CMM, Rebelo LPN, de Sousa HC. Phosphonium-based ionic liquids as modifiers for biomedical grade poly(vinyl chloride). Acta Biomater 2012; 8:1366-79. [PMID: 22085860 DOI: 10.1016/j.actbio.2011.10.034] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Revised: 09/26/2011] [Accepted: 10/28/2011] [Indexed: 11/16/2022]
Abstract
This work reports and discusses the influence of four phosphonium-based ionic liquids (PhILs), namely trihexyl(tetradecyl) phosphonium dicyanamide, [P(6,6,6,14)][dca]; trihexyl(tetradecyl) phosphonium bis(trifluoromethylsulfonyl)imide, [P(6,6,6,14)][Tf(2)N]; tetrabutyl phosphonium bromide, [P(4,4,4,4)][Br]; and tetrabutyl phosphonium chloride, [P(4,4,4,4)][Cl], on some of the chemical, physical and biological properties of a biomedical-grade suspension of poly(vinyl chloride) (PVC). The main goal of this work was to evaluate the capacity of these PhILs to modify some of the properties of neat PVC, in particular those that may allow their use as potential alternatives to traditional phthalate-based plasticizers in PVC biomedical applications. PVC films having different PhIL compositions (0, 5, 10 and 20 wt.%) were prepared (by solvent film casting) and characterised by Fourier transform infrared, thermogravimetric analysis, differential scanning calorimetry, dynamical mechanical thermal analysis, scanning electron microscopy/energy-dispersive X-ray/electron probe microanalysis, X-ray diffraction, transmittance, permeability towards oxygen and carbon dioxide, thermal degradation, contact angle measurement, water and vapour uptake, leachability and biocompatibility (haemolytic potential, thrombogenicity and cytotoxicity). A conventional organic plasticizer (di-isononyl phthalate) was used for comparison purposes. The results obtained showed that it was possible to change the neat PVC hydrophobicity, and consequently its water uptake capacity and plasticizer leachability, just by changing the PhIL employed and its composition. It was also possible to significantly change the thermal and mechanical properties of PVC films by choosing appropriate PhIL cation/anion combinations. However, a specific PhIL may not always be capable of simultaneously keeping and/or improving both physical properties. In addition, ionic halide salts were found to promote PVC dehydrochlorination. Finally, none of the prepared materials presented toxicity against Caco-2 cells, though pure [P(6,6,6,14)][dca] decreased HepG2 cells viability. Moreover, PVC films with [P(6,6,6,14)][dca] and [P(4,4,4,4)][Cl] were found to be haemolytic and thus these PhILs must be avoided as PVC modifiers if biomedical applications are envisaged. In conclusion, from all the PhILs tested, [P(6,6,6,14)][Tf(2)N] showed the most promising results regarding blood compatibility, leaching and permeability to gases of PVC films. The results presented are a strong indicator that adequate PhILs may be successfully employed as PVC multi-functional plasticizers for a wide range of potential applications, including those in the biomedical field.
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Affiliation(s)
- Ana M A Dias
- CIEPQPF, Chemical Engineering Department, FCTUC, University of Coimbra, Rua Sílvio Lima, Pólo II - Pinhal de Marrocos, 3030-790 Coimbra, Portugal.
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26
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Tamura K, Nakamura N, Ohno H. Cytochrome c dissolved in 1-allyl-3-methylimidazolium chloride type ionic liquid undergoes a quasi-reversible redox reaction up to 140°C. Biotechnol Bioeng 2011; 109:729-35. [DOI: 10.1002/bit.24357] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Revised: 10/06/2011] [Accepted: 10/17/2011] [Indexed: 11/06/2022]
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27
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Lu L, Huang X, Qu Y. Effect of the structure of imidazolium cations in [BF4]−-type ionic liquids on direct electrochemistry and electrocatalysis of horseradish peroxidase in Nafion films. Colloids Surf B Biointerfaces 2011; 87:61-6. [DOI: 10.1016/j.colsurfb.2011.04.037] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Revised: 04/12/2011] [Accepted: 04/30/2011] [Indexed: 11/15/2022]
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28
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Manivel A, Velayutham D, Noel M. Electrochemical behaviour of tetra-n-butylammonium nonaflate as an ionic liquid and as a supporting electrolyte in aprotic solvents: A comparative study. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2011.02.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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29
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Hydrogen bioelectrooxidation in ionic liquids: From cytochrome c3 redox behavior to hydrogenase activity. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2010.12.104] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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30
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Chen XW, Liu JW, Wang JH. A Highly Fluorescent Hydrophilic Ionic Liquid as a Potential Probe for the Sensing of Biomacromolecules. J Phys Chem B 2011; 115:1524-30. [DOI: 10.1021/jp109121h] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xu-Wei Chen
- Research Center for Analytical Sciences, Northeastern University, Box 332, Shenyang 110819, China
| | - Jia-Wei Liu
- Research Center for Analytical Sciences, Northeastern University, Box 332, Shenyang 110819, China
| | - Jian-Hua Wang
- Research Center for Analytical Sciences, Northeastern University, Box 332, Shenyang 110819, China
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31
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Ding SF, Zhao GC, Wei XW. Direct electrochemistry of myoglobin in a room temperature ionic liquid aqueous solution and its catalysis to H2O2. RUSS J ELECTROCHEM+ 2011. [DOI: 10.1134/s1023193508030129] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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32
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Wei W, Danielson ND. Fluorescence and circular dichroism spectroscopy of cytochrome c in alkylammonium formate ionic liquids. Biomacromolecules 2011; 12:290-7. [PMID: 21210672 DOI: 10.1021/bm1008052] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The structural stability of cytochrome c has been studied in alkylammonium formate (AAF) ionic liquids such as methylammonium formate (MAF) and ethylammonium formate (EAF) by fluorescence and circular dichroism (CD) spectroscopy. At room temperature, the native structure of cytochrome c is maintained in relatively high ionic liquid concentrations (50-70% AAF/water or AAF/phosphate buffer pH 7.0) in contrast with denaturation of cytochrome c in similar solutions of methanol or acetonitrile with water or buffer cosolvents. Fluorescence and CD spectra indicate that the conformation of cytochrome c is maintained in 20% AAF-80% water from 30 to 50 °C. No such temperature stability is found in 80% AAF-20% water. About one-third of the enzyme activity of cytochrome c in 80% AAF-20% water can be maintained as compared with phosphate buffer, and this is greater than the activities measured in corresponding methanol and acetonitrile aqueous solutions. This biophysical study shows that AAFs have potential application as organic solvent replacements at moderate temperature in the mobile phase for the separation of proteins in their native form by reversed phase liquid chromatography.
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Affiliation(s)
- Wenjun Wei
- Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio 45056, USA
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33
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Bihari M, Russell TP, Hoagland DA. Dissolution and dissolved state of cytochrome C in a neat, hydrophilic ionic liquid. Biomacromolecules 2010; 11:2944-8. [PMID: 20929217 DOI: 10.1021/bm100735z] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The dissolution and dissolved molecular state of cytochrome c were investigated in the room temperature ionic liquid ethylmethylimidazolium ethylsulfate, [EMIM][EtSO4], by viscometry, optical and vibrational spectroscopies, and peroxidase activity. In dilute mixtures, viscometry demonstrated true molecular dissolution of cytochrome c in the ionic liquid and uncovered a molecular size larger than that in aqueous buffer, suggesting altered solvation or slight denaturation. The protein's heme unit absorbs light outside the spectral range masked by [EMIM], enabling conformational assessments by UV-visible and circular dichroism spectroscopies. Adding trends from fluorescence and Fourier transform infrared spectroscopy, unchanged secondary but perturbed tertiary structures were determined, consistent with the appreciable peroxidase activity measured. Different than in aqueous buffers, denaturation is not accompanied by aggregation. Results are relevant to the proposed application of ionic liquids as media for room temperature preservation of biomacromolecules.
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Affiliation(s)
- Malvika Bihari
- Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003
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34
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Wang Y, Xiong H, Zhang X, Wang S. Detection of rutin at DNA modified carbon paste electrode based on a mixture of ionic liquid and paraffin oil as a binder. Mikrochim Acta 2010. [DOI: 10.1007/s00604-010-0380-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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35
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Xi H, Ju S, Chen Z, Sun X. Synthesis ofN,N′-Bis(thioacetoxyalkoxy)piperazine and Its Self-assembled Monolayer (SAM) Formation on Gold Electrode. CHEM LETT 2010. [DOI: 10.1246/cl.2010.415] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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36
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Miyachi M, Yamanoi Y, Shibata Y, Matsumoto H, Nakazato K, Konno M, Ito K, Inoue Y, Nishihara H. A photosensing system composed of photosystem I, molecular wire, gold nanoparticle, and double surfactants in water. Chem Commun (Camb) 2010; 46:2557-9. [DOI: 10.1039/b926841c] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Armand M, Endres F, MacFarlane DR, Ohno H, Scrosati B. Ionic-liquid materials for the electrochemical challenges of the future. NATURE MATERIALS 2009; 8:621-9. [PMID: 19629083 DOI: 10.1038/nmat2448] [Citation(s) in RCA: 2499] [Impact Index Per Article: 166.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Ionic liquids are room-temperature molten salts, composed mostly of organic ions that may undergo almost unlimited structural variations. This review covers the newest aspects of ionic liquids in applications where their ion conductivity is exploited; as electrochemical solvents for metal/semiconductor electrodeposition, and as batteries and fuel cells where conventional media, organic solvents (in batteries) or water (in polymer-electrolyte-membrane fuel cells), fail. Biology and biomimetic processes in ionic liquids are also discussed. In these decidedly different materials, some enzymes show activity that is not exhibited in more traditional systems, creating huge potential for bioinspired catalysis and biofuel cells. Our goal in this review is to survey the recent key developments and issues within ionic-liquid research in these areas. As well as informing materials scientists, we hope to generate interest in the wider community and encourage others to make use of ionic liquids in tackling scientific challenges.
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Affiliation(s)
- Michel Armand
- LRCS CNRS 6007, Université de Picardie Jules Verne, F-80039 Amiens, France
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38
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3-mercaptopropylphosphonic acid modified gold electrode for electrochemical detection of dopamine. Bioelectrochemistry 2009; 75:26-31. [DOI: 10.1016/j.bioelechem.2008.12.005] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2008] [Revised: 12/25/2008] [Accepted: 12/31/2008] [Indexed: 11/23/2022]
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39
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40
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41
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Li X, Xu X, Dan Y, Feng J, Ge L, Zhang M. The crystallization of lysozyme in the system of ionic liquid [BMIm][BF4]-water. CRYSTAL RESEARCH AND TECHNOLOGY 2008. [DOI: 10.1002/crat.200800040] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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42
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Jiang H, Du C, Zou Z, Li X, Akins DL, Yang H. A biosensing platform based on horseradish peroxidase immobilized onto chitosan-wrapped single-walled carbon nanotubes. J Solid State Electrochem 2008. [DOI: 10.1007/s10008-008-0612-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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43
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Hapiot P, Lagrost C. Electrochemical Reactivity in Room-Temperature Ionic Liquids. Chem Rev 2008; 108:2238-64. [DOI: 10.1021/cr0680686] [Citation(s) in RCA: 996] [Impact Index Per Article: 62.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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44
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Evans KO. Supported phospholipid membrane interactions with 1-butyl-3-methylimidazolium chloride. J Phys Chem B 2008; 112:8558-62. [PMID: 18588326 DOI: 10.1021/jp7116592] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Quartz crystal microbalance with dissipation measurements were conducted for a 98/2 mole ratio of 1,2-dielaidoylphosphocholine (DEPC) and 1,2-dimyristoylphosphoglycerol (DMPG) on silica, gold, and a self-assembled monolayer of 11-mercapto-1-undecanol (11MU) and 11-mercaptoundecanoic acid (11MUA) at 50 mol % each. This study demonstrates that vesicles composed of DEPC and DMPG at 98 and 2 mol %, respectively, formed a supported bilayer with unruptured vesicles present when adsorbed onto the self-assembled monolayer. Also, the partially formed supported bilayer apparently deadsorbed in the presence of 1-butyl-3-methylimidazolium chloride, suggesting that surface-bilayer interactions are weaker on a hydrophilic modified gold surface composed of 50/50 11MU/11MUA than the surface-bilayer interactions on silica.
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Affiliation(s)
- Kervin O Evans
- New Crops and Processing Technology Research Unit, United States Department of Agriculture, Agricultural Research Service, National Center for Agricultural Utilization Research, Peoria, Illinois 61604, USA.
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45
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Ding SF, Wei W, Zhao GC. Direct electrochemical response of cytochrome c on a room temperature ionic liquid, N-butylpyridinium tetrafluoroborate, modified electrode. Electrochem commun 2007. [DOI: 10.1016/j.elecom.2007.06.023] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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46
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Influence of ionic liquids on the direct electrochemistry of glucose oxidase entrapped in nanogold-N,N-dimethylformamide-ionic liquid composite film. Electrochim Acta 2007. [DOI: 10.1016/j.electacta.2007.04.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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