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Yeboah J, Metott ZJ, Butch CM, Hillesheim PC, Mirjafari A. Are nature's strategies the solutions to the rational design of low-melting, lipophilic ionic liquids? Chem Commun (Camb) 2024; 60:3891-3909. [PMID: 38420843 PMCID: PMC10994746 DOI: 10.1039/d3cc06066g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Ionic liquids (ILs) have emerged as a new class of materials, displaying a unique capability to self-assemble into micelles, liposomes, liquid crystals, and microemulsions. Despite evident interest, advancements in the controlled formation of amphiphilic ILs remain in the early stages. Taking inspiration from nature, we introduced the concept of lipid-like (or lipid-inspired) ILs more than a decade ago, aiming to create very low-melting, highly lipophilic ILs that are potentially bio-innocuous - a combination of attributes that is frequently antithetical but highly desirable from several application-specific standpoints. Lipid-like ILs are a subclass of functional organic liquid salts that include a range of lipidic side chains such as saturated, unsaturated, linear, branched, and thioether while retaining melting points below room temperature. It was observed in several homologous series of [Cnmim] ILs that elongation of N-appended alkyl chains to greater than seven carbons leads to a substantial increase in melting point (Tm) - which is the most characteristic feature of ILs. Accordingly, it is challenging to develop ILs with low Tm values while preserving their hydrophobicity and self-organizing properties. We found that two alternative Tm depressive approaches are useful. One of these is the replacement of the double bonds with thioether moieties in the alkyl chains, as detailed in several published papers detailing the chemistry of these ILs. Employing thiol-ene and thiol-yne click reactions is a facile, robust, and orthogonal method to overcome the challenges associated with the synthesis of alkyl thioether-functionalized ILs. The second approach involves replacing the double bonds with the cisoid cyclopropyl motif, mimicking the strategy used by certain organisms to modulate cell membrane fluidity. This discovery has the potential to greatly impact the utilization of lipid-like ILs in various applications, including gene delivery, lubricants, heat transfer fluids, and haloalkane separations, among others. This feature article presents a concise, historical overview, highlighting key findings from our work while offering speculation about the future trajectory of this de novo class of soft organic-ion materials.
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Affiliation(s)
- John Yeboah
- Department of Chemistry, State University of New York at Oswego, Oswego, New York 13126, USA.
| | - Zachary J Metott
- Department of Chemistry, State University of New York at Oswego, Oswego, New York 13126, USA.
| | - Christopher M Butch
- Department of Chemistry, State University of New York at Oswego, Oswego, New York 13126, USA.
| | - Patrick C Hillesheim
- Department of Chemistry and Physics, Ave Maria University, Ave Maria, Florida, 34142, USA.
| | - Arsalan Mirjafari
- Department of Chemistry, State University of New York at Oswego, Oswego, New York 13126, USA.
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2
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O'Brien RA, Hillesheim PC, Soltani M, Badilla-Nunez KJ, Siu B, Musozoda M, West KN, Davis JH, Mirjafari A. Cyclopropane as an Unsaturation "Effect Isostere": Lowering the Melting Points in Lipid-like Ionic Liquids. J Phys Chem B 2023; 127:1429-1442. [PMID: 36745872 DOI: 10.1021/acs.jpcb.2c07872] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The replacement of unsaturation with a cyclopropane motif as a (bio)isostere is a widespread strategy in bacteria to tune the fluidity of lipid bilayers and protect membranes when exposed to adverse environmental conditions, e.g., high temperature, low pH, etc. Inspired by this phenomenon, we herein address the relative effect of the cyclopropanation, both cis and trans configurations, on melting points, packing efficiency, and order of a series of lipid-like ionic liquids via a combination of thermophysical analysis, X-ray crystallography, and computational modeling. The data indicate there is considerable structural latitude possible when designing highly lipophilic ionic liquids that exhibit low melting points. While cyclopropanation of the lipid-like ionic liquids provides more resistance to aerobic degradation than their olefin analogs, the impact on the melting point decrease is not as pronounced. Our results demonstrate that incorporating one or more cyclopropyl moieties in long aliphatic chains of imidazolium-based ionic liquids is highly effective in lowering the melting points of such materials relative to their counterparts bearing linear, saturated, or thioether side chains. It is shown that the cyclopropane moiety effectively disrupts packing, favoring formation of gauche conformer in the side chains, resulting in enhancement of fluidity. This was irrespective of the configuration of the methylene bridge, although marked differences in the effect of cis- and trans-monocyclopropanated ILs on the melting points were observed.
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Affiliation(s)
- Richard A O'Brien
- Department of Chemistry, The University of South Alabama, Mobile, Alabama 36688, United States
| | - Patrick C Hillesheim
- Department of Chemistry and Physics, Ave Maria University, Ave Maria, Florida 34142, United States
| | - Mohammad Soltani
- Department of Chemistry, The University of South Alabama, Mobile, Alabama 36688, United States
| | - Kelly J Badilla-Nunez
- Department of Chemical and Biomolecular Engineering, The University of South Alabama, Mobile, Alabama 36688, United States
| | - Ben Siu
- Department of Chemical and Biomolecular Engineering, The University of South Alabama, Mobile, Alabama 36688, United States
| | - Muhammadiqboli Musozoda
- Department of Chemistry, State University of New York at Oswego, Oswego, New York 13126, United States
| | - Kevin N West
- Department of Chemical and Biomolecular Engineering, The University of South Alabama, Mobile, Alabama 36688, United States
| | - James H Davis
- Department of Chemistry, The University of South Alabama, Mobile, Alabama 36688, United States
| | - Arsalan Mirjafari
- Department of Chemistry, State University of New York at Oswego, Oswego, New York 13126, United States
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3
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Siegel DJ, Anderson GI, Paul LM, Seibert PJ, Hillesheim PC, Sheng Y, Zeller M, Taubert A, Werner P, Balischewski C, Michael SF, Mirjafari A. Design Principles of Lipid-like Ionic Liquids for Gene Delivery. ACS APPLIED BIO MATERIALS 2021; 4:4737-4743. [PMID: 35007023 DOI: 10.1021/acsabm.1c00252] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We developed lipid-like ionic liquids, containing 2-mercaptoimidazolium and 2-mercaptothiazolinium headgroups tethered to two long saturated alkyl chains, as carriers for in vitro delivery of plasmid HEK DNA into 293T cells. We employed a combination of modular design, synthesis, X-ray analysis, and computational modeling to rationalize the self-assembly and desired physicochemical and biological properties. The results suggest that thioamide-derived ionic liquids may serve as a modular platform for lipid-mediated gene delivery. This work represents a step toward understanding the structure-function relationships of these amphiphiles with long-range ordering and offering insight into design principles for synthetic vectors based on self-assembly behavior.
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Affiliation(s)
- David J Siegel
- Department of Chemistry and Physics, Florida Gulf Coast University, Fort Myers, Florida 33965, United States
| | - Grace I Anderson
- Department of Chemistry and Physics, Florida Gulf Coast University, Fort Myers, Florida 33965, United States
| | - Lauren M Paul
- Department of Biological Sciences, Florida Gulf Coast University, Fort Myers, Florida 33965, United States
| | - Philipp J Seibert
- Department of Chemistry and Physics, Florida Gulf Coast University, Fort Myers, Florida 33965, United States
| | - Patrick C Hillesheim
- Department of Chemistry and Physics, Ave Maria University, Ave Maria, Florida 34142, United States
| | - Yinghong Sheng
- Department of Chemistry and Physics, Florida Gulf Coast University, Fort Myers, Florida 33965, United States
| | - Matthias Zeller
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Andreas Taubert
- Institute of Chemistry, University of Potsdam, Potsdam D-14476, Germany
| | - Peter Werner
- Institute of Chemistry, University of Potsdam, Potsdam D-14476, Germany
| | | | - Scott F Michael
- Department of Biological Sciences, Florida Gulf Coast University, Fort Myers, Florida 33965, United States
| | - Arsalan Mirjafari
- Department of Chemistry and Physics, Florida Gulf Coast University, Fort Myers, Florida 33965, United States
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4
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Sevrain CM, Fontaine D, Bauduin A, Guéguinou M, Zhang BL, Chantôme A, Mahéo K, Pasqualin C, Maupoil V, Couthon H, Vandier C, Jaffrès PA. Thio-ether functionalized glycolipid amphiphilic compounds reveal a potent activator of SK3 channel with vasorelaxation effect. Org Biomol Chem 2021; 19:2753-2766. [PMID: 33687423 DOI: 10.1039/d1ob00021g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The modulation of SK3 ion channels can be efficiently and selectively achieved by using the amphiphilic compound Ohmline (a glyco-glycero-ether-lipid). We report herein a series of Ohmline analogues featuring the replacement of one ether function by a thioether function located at the same position or shifted close to its initial position. The variation of the lipid chain length and the preparation of two analogues featuring either one sulfoxide or one sulfone moiety complete this series. Patch clamp measurements indicate that the presence of the thioether function (compounds 7 and 17a) produces strong activators of SK3 channels, whereas the introduction of a sulfoxide or a sulfone function at the same place produces amphiphiles devoid of an effect on SK3 channels. Compounds 7 and 17a are the first amphiphilic compounds featuring strong activation of SK3 channels (close to 200% activation). The cytosolic calcium concentration determined from fluorescence at 3 different times for compound 7b (13 min, 1 h, 24 h) revealed that the effect is different suggesting that the compound could be metabolized over time. This compound could be used as a strong SK3 activator for a short time. The capacity of 7b to activate SK3 was then used to induce vasorelaxation via an endothelium-derived hyperpolarization (EDH) pathway. For the first time, we report that an amphiphilic compound can affect the endothelium dependent vasorelaxation.
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Affiliation(s)
- Charlotte M Sevrain
- Univ. Brest, CNRS, CEMCA UMR 6521, 6 Avenue Victor Le Gorgeu, Brest, F-29238 Brest, France.
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5
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Bouraoui A, Berchel M, Ghanem R, Vié V, Paboeuf G, Deschamps L, Lozach O, Le Gall T, Montier T, Jaffrès PA. Substitution of unsaturated lipid chains by thioether-containing lipid chains in cationic amphiphiles: physicochemical consequences and application for gene delivery. Org Biomol Chem 2020; 17:3609-3616. [PMID: 30912791 DOI: 10.1039/c9ob00473d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The hydrophobic moiety of cationic amphiphiles plays an important role in the transfection process because its structure has an impact on both the type of the supramolecular assembly and the dynamic properties of these assemblies. The latter have to exhibit a compromise between stability and instability to efficiently compact then deliver DNA into target cells. In the present work, we report the synthesis of new cationic amphiphiles featuring a thioether function at different positions of two 18-atom length lipid chains and we study their physicochemical properties (anisotropy of fluorescence and compression isotherms) with analogues possessing either oleyl (C18:1) or stearyl (C18:0) chains. We show that the fluidity of cationic lipids featuring a thioether function located close to the middle of each lipid chain is intermediate between that of oleyl- and stearyl-containing analogues. These properties are also supported by the compression isotherm assays. When used as carriers to deliver a plasmid DNA, thioether-containing cationic amphiphiles demonstrate a good ability to transfect human-derived cell lines, with those incorporating such a moiety in the middle of the chain being the most efficient. This work supports the use of a thioether function as a possible alternative to unsaturation in aliphatic lipid chains of cationic amphiphiles to modulate physicochemical behaviours and in turn biological activities such as gene delivery ability.
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Affiliation(s)
- Amal Bouraoui
- CEMCA UMR CNRS 6521, Université de Brest, IBSAM, 6 Avenue Victor Le Gorgeu, F-29238 Brest, France.
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6
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Rabideau BD, Soltani M, Parker RA, Siu B, Salter EA, Wierzbicki A, West KN, Davis JH. Tuning the melting point of selected ionic liquids through adjustment of the cation's dipole moment. Phys Chem Chem Phys 2020; 22:12301-12311. [PMID: 32432261 DOI: 10.1039/d0cp01214a] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In previous work with thermally robust salts [Cassity et al., Phys. Chem. Chem. Phys., 2017, 19, 31560] it was noted that an increase in the dipole moment of the cation generally led to a decrease in the melting point. Molecular dynamics simulations of the liquid state revealed that an increased dipole moment reduces cation-cation repulsions through dipole-dipole alignment. This was believed to reduce the liquid phase enthalpy, which would tend to lower the melting point of the IL. In this work we further test this principle by replacing hydrogen atoms with fluorine atoms at selected positions within the cation. This allows us to alter the electrostatics of the cation without substantially affecting the sterics. Furthermore, the strength of the dipole moment can be controlled by choosing different positions within the cation for replacement. We studied variants of four different parent cations paired with bistriflimide and determined their melting points, and enthalpies and entropies of fusion through DSC experiments. The decreases in the melting point were determined to be enthalpically driven. We found that the dipole moment of the cation, as determined by quantum chemical calculations, is inversely correlated with the melting point of the given compound. Molecular dynamics simulations of the crystalline and solid states of two isomers showed differences in their enthalpies of fusion that closely matched those seen experimentally. Moreover, this reduction in the enthalpy of fusion was determined to be caused by an increase in the enthalpy of the crystalline state. We provide evidence that dipole-dipole interactions between cations leads to the formation of cationic domains in the crystalline state. These cationic associations partially block favourable cation-anion interactions, which are recovered upon melting. If, however, the dipole-dipole interactions between cations is too strong they have a tendency to form glasses. This study provides a design rule for lowering the melting point of structurally similar ILs by altering their dipole moment.
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Affiliation(s)
- Brooks D Rabideau
- Department of Chemical & Biomolecular Engineering, The University of South Alabama, Mobile, Alabama 36688, USA.
| | - Mohammad Soltani
- Department of Chemistry, The University of South Alabama, Mobile, Alabama 36688, USA.
| | - Rome A Parker
- Department of Chemical & Biomolecular Engineering, The University of South Alabama, Mobile, Alabama 36688, USA.
| | - Benjamin Siu
- Department of Chemical & Biomolecular Engineering, The University of South Alabama, Mobile, Alabama 36688, USA.
| | - E Alan Salter
- Department of Chemistry, The University of South Alabama, Mobile, Alabama 36688, USA.
| | - Andrzej Wierzbicki
- Department of Chemistry, The University of South Alabama, Mobile, Alabama 36688, USA.
| | - Kevin N West
- Department of Chemical & Biomolecular Engineering, The University of South Alabama, Mobile, Alabama 36688, USA.
| | - James H Davis
- Department of Chemistry, The University of South Alabama, Mobile, Alabama 36688, USA.
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7
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Moore LM, Greeson KT, Redeker ND, Zavala JJ, Le TC, Gilmore LV, Thompson KB, Marcischak JC, Quintana AS, Teat SJ, Guenthner AJ, Ghiassi KB. Fluoroalkyl-functional imidazoles and imidazolium–based ionic liquids prepared via thiol-ene/yne click chemistry. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111677] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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8
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From gene delivery agents to ionic liquids: The impacts of cation structure and anion identity on liquefaction. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111758] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Bouraoui A, Ghanem R, Berchel M, Vié V, Le Guen Y, Paboeuf G, Deschamps L, Le Gall T, Montier T, Jaffrès PA. Bis-Thioether-Containing Lipid Chains in Cationic Amphiphiles: Physicochemical Properties and Applications in Gene Delivery. Chemphyschem 2019; 20:2187-2194. [PMID: 31393059 DOI: 10.1002/cphc.201900626] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 07/18/2019] [Indexed: 11/08/2022]
Abstract
Cationic amphiphiles featuring two thioether functions in each lipid chain of bicatenar cationic amphiphiles are reported here for the first time. The physicochemical properties and transfection abilities of these new amphiphiles were compared with those of already reported analogues featuring either (i) saturated, (ii) unsaturated or (iii) mono-thioether containing lipid chains. The homogeneity of the series of new compounds allowed to clearly underscore the effect of bis-thioether containing lipid chains. This study shows that besides previous strategies based on unsaturation or ramification, the incorporation of two thioether functions per lipid chain constitutes an original complementary alternative to tune the supramolecular properties of amphiphilic compounds. The potential of this strategy was evaluated in the context of gene delivery and report that two cationic amphiphiles (i. e. 4 a and 4 b) can be proposed as new efficient transfection reagents.
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Affiliation(s)
- Amal Bouraoui
- Univ Brest, CNRS, CEMCA, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, F-29238, Brest, France
| | - Rosy Ghanem
- Univ Brest, INSERM UMR 1078, IBSAM, UFR Médecine et Sciences de la Santé, CHRU Brest, 22 avenue Camille Desmoulins, F-29238, Brest, France
| | - Mathieu Berchel
- Univ Brest, CNRS, CEMCA, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, F-29238, Brest, France
| | - Véronique Vié
- Univ Rennes, CNRS, IPR - UMR 6251, ScanMAT - UMS 2001, F-35000, Rennes, France
| | - Yann Le Guen
- Univ Brest, INSERM UMR 1078, IBSAM, UFR Médecine et Sciences de la Santé, CHRU Brest, 22 avenue Camille Desmoulins, F-29238, Brest, France
| | - Gilles Paboeuf
- Univ Rennes, CNRS, IPR - UMR 6251, ScanMAT - UMS 2001, F-35000, Rennes, France
| | - Laure Deschamps
- Univ Brest, CNRS, CEMCA, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, F-29238, Brest, France
| | - Tony Le Gall
- Univ Brest, INSERM UMR 1078, IBSAM, UFR Médecine et Sciences de la Santé, CHRU Brest, 22 avenue Camille Desmoulins, F-29238, Brest, France
| | - Tristan Montier
- Univ Brest, INSERM UMR 1078, IBSAM, UFR Médecine et Sciences de la Santé, CHRU Brest, 22 avenue Camille Desmoulins, F-29238, Brest, France
| | - Paul-Alain Jaffrès
- Univ Brest, CNRS, CEMCA, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, F-29238, Brest, France
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10
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Mirjafari A. Ionic liquid syntheses via click chemistry: expeditious routes toward versatile functional materials. Chem Commun (Camb) 2018; 54:2944-2961. [DOI: 10.1039/c8cc00372f] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The application of click reaction (e.g. CuAAC, thiol–X, oxime formation and nucleophilic ring opening) has recently begun to draw attention for efficient and robust synthesis of new functional ionic liquids, requiring minimal purification.
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Affiliation(s)
- Arsalan Mirjafari
- Department of Chemistry and Physics
- Florida Gulf Coast University
- Fort Myers
- USA
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11
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Nestor ST, Heinrich B, Sykora RA, Zhang X, McManus GJ, Douce L, Mirjafari A. Methimazolium-based ionic liquid crystals: Emergence of mesomorphic properties via a sulfur motif. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.07.056] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Thigpen AS, Nestor ST, O'Brien RA, Minkowicz S, Sheng Y, Davis JH, West KN, Mirjafari A. Thioether-functionalized picolinium ionic liquids: synthesis, physical properties and computational studies. NEW J CHEM 2017. [DOI: 10.1039/c6nj02451c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Facile and robust construction of picolinium ionic liquids via thiol–ene reaction bestows materials with low Tg/Tm values along with high hydrophobicity and heat capacity.
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Affiliation(s)
- A. Shay Thigpen
- Department of Chemical and Biomolecular Engineering
- University of South Alabama
- Mobile
- USA
| | - Stephen T. Nestor
- Department of Chemistry and Physics
- Florida Gulf Coast University
- Fort Myers
- USA
| | | | - Samuel Minkowicz
- Department of Chemistry and Physics
- Florida Gulf Coast University
- Fort Myers
- USA
| | - Yinghong Sheng
- Department of Chemistry and Physics
- Florida Gulf Coast University
- Fort Myers
- USA
| | - James H. Davis
- Department of Chemistry
- University of South Alabama
- Mobile
- USA
| | - Kevin N. West
- Department of Chemical and Biomolecular Engineering
- University of South Alabama
- Mobile
- USA
| | - Arsalan Mirjafari
- Department of Chemistry and Physics
- Florida Gulf Coast University
- Fort Myers
- USA
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13
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Cassity CA, Siu B, Soltani M, McGeehee JL, Strickland KJ, Vo M, Salter EA, Stenson AC, Wierzbicki A, West KN, Rabideau BD, Davis JH. The effect of structural modifications on the thermal stability, melting points and ion interactions for a series of tetraaryl-phosphonium-based mesothermal ionic liquids. Phys Chem Chem Phys 2017; 19:31560-31571. [DOI: 10.1039/c7cp06278h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New mesothermal ionic liquids (left).
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Affiliation(s)
| | - Benjamin Siu
- Department of Chemical & Biomolecular Engineering
- University of South Alabama
- Mobile
- USA
| | | | | | | | - Matt Vo
- Department of Chemistry
- University of South Alabama
- Mobile
- USA
| | - E. Alan Salter
- Department of Chemistry
- University of South Alabama
- Mobile
- USA
| | | | | | - Kevin N. West
- Department of Chemical & Biomolecular Engineering
- University of South Alabama
- Mobile
- USA
| | - Brooks D. Rabideau
- Department of Chemical & Biomolecular Engineering
- University of South Alabama
- Mobile
- USA
| | - James H. Davis
- Department of Chemistry
- University of South Alabama
- Mobile
- USA
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14
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Green BD, Badini AJ, O'Brien RA, Davis JH, West KN. Liquid–liquid equilibria of binary mixtures of a lipidic ionic liquid with hydrocarbons. Phys Chem Chem Phys 2016; 18:2459-67. [DOI: 10.1039/c5cp06101f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A lipidic ionic liquid is described with very high alkane solubility that is virtually immiscible in the alkane phase.
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Affiliation(s)
- Blane D. Green
- Department of Chemical & Biomolecular Engineering
- University of South Alabama
- Mobile
- USA
| | - Alexander J. Badini
- Department of Chemical & Biomolecular Engineering
- University of South Alabama
- Mobile
- USA
| | | | - James H. Davis
- Department of Chemistry
- University of South Alabama
- Mobile
- USA
| | - Kevin N. West
- Department of Chemical & Biomolecular Engineering
- University of South Alabama
- Mobile
- USA
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15
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O'Brien RA, Zayas MS, Nestor ST, Gaitor JC, Paul LM, Edhegard FA, Minkowicz S, Sykora RE, Sheng Y, Michael SF, Isern S, Mirjafari A. Biomimetic design of protic lipidic ionic liquids with enhanced fluidity. NEW J CHEM 2016. [DOI: 10.1039/c6nj00657d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Synthesis of low-melting protic ionic liquids with C16–C20 side chains via the S-alkylation of the methimazole ring.
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Affiliation(s)
| | | | - Stephen T. Nestor
- Department of Chemistry and Physics
- Florida Gulf Coast University
- Fort Myers
- USA
| | - Jamie C. Gaitor
- Department of Chemistry and Physics
- Florida Gulf Coast University
- Fort Myers
- USA
| | - Lauran M. Paul
- Department of Biological Sciences
- Florida Gulf Coast University
- Fort Myers
- USA
| | | | - Samuel Minkowicz
- Department of Chemistry and Physics
- Florida Gulf Coast University
- Fort Myers
- USA
| | | | - Yinghong Sheng
- Department of Chemistry and Physics
- Florida Gulf Coast University
- Fort Myers
- USA
| | - Scott F. Michael
- Department of Biological Sciences
- Florida Gulf Coast University
- Fort Myers
- USA
| | - Sharon Isern
- Department of Biological Sciences
- Florida Gulf Coast University
- Fort Myers
- USA
| | - Arsalan Mirjafari
- Department of Chemistry and Physics
- Florida Gulf Coast University
- Fort Myers
- USA
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16
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Thomas MJ, Bramblett KA, Green BD, West KN. Thermophysical and absorption properties of brominated vegetable oil. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.07.060] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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17
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Green BD, O’Brien RA, Davis JH, West KN. Ethane and Ethylene Solubility in an Imidazolium-Based Lipidic Ionic Liquid. Ind Eng Chem Res 2015. [DOI: 10.1021/ie505071t] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Blane D. Green
- Department
of Chemical and Biomolecular Engineering, University of South Alabama, Mobile, Alabama 36688, United States
| | - Richard A. O’Brien
- Department
of Chemistry, University of South Alabama, Mobile, Alabama 36688, United States
| | - James H. Davis
- Department
of Chemistry, University of South Alabama, Mobile, Alabama 36688, United States
| | - Kevin N. West
- Department
of Chemical and Biomolecular Engineering, University of South Alabama, Mobile, Alabama 36688, United States
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