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Fallah Z, Zare EN, Khan MA, Iftekhar S, Ghomi M, Sharifi E, Tajbakhsh M, Nikfarjam N, Makvandi P, Lichtfouse E, Sillanpaa M, Varma RS. Ionic liquid-based antimicrobial materials for water treatment, air filtration, food packaging and anticorrosion coatings. Adv Colloid Interface Sci 2021; 294:102454. [PMID: 34102390 DOI: 10.1016/j.cis.2021.102454] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 05/25/2021] [Accepted: 05/25/2021] [Indexed: 02/08/2023]
Abstract
Efforts to widen the scope of ionic liquids applications across diverse research areas have flourished in the last two decades with developments in understanding and tailoring their physical, chemical, and biological properties. The promising applications of ionic liquids-based materials as antimicrobial systems is due to their ability and flexibility to be tailored in varying sizes, morphologies, and surface charges. Ionic liquids are also considered as greener materials. Common methods for the preparation of ionic liquid-based materials include crosslinking, loading, grafting, and combination of ionic liquids with other polymeric materials. Recent research focuses on the tuning of the biological properties to design novel ionic liquids-based antimicrobial materials. Here, the properties, synthesis and applications of ionic liquids and ionic liquids-based materials are reviewed with focus on antimicrobial activities applied to water treatment, air filtration, food packaging, and anticorrosion.
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Rahmati M, Ghafuri H. Catalytic Strecker reaction: g-C3N4-anchored sulfonic acid organocatalyst for the synthesis of α-aminonitriles. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-020-04370-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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3
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Bronsted acid-functionalized choline chloride-butane sultone for the catalytic decomposition of cumene hydroperoxide to phenol. J CHEM SCI 2018. [DOI: 10.1007/s12039-018-1445-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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4
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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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Maier F, Niedermaier I, Steinrück HP. Perspective: Chemical reactions in ionic liquids monitored through the gas (vacuum)/liquid interface. J Chem Phys 2017; 146:170901. [DOI: 10.1063/1.4982355] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- F. Maier
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen,
Germany
| | - I. Niedermaier
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen,
Germany
| | - H.-P. Steinrück
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen,
Germany
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Men S, Lovelock KRJ, Licence P. Directly probing the effect of the solvent on a catalyst electronic environment using X-ray photoelectron spectroscopy. RSC Adv 2015. [DOI: 10.1039/c5ra04662a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The anion of an ionic liquid can significantly influence the electronic environment of a metal centre, and thus impact upon reaction performance in a model Suzuki cross coupling reaction.
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Affiliation(s)
- Shuang Men
- Shenyang Ligong University
- School of Material Science and Engineering
- Shenyang
- China
- The University of Nottingham
| | | | - Peter Licence
- The University of Nottingham
- School of Chemistry
- Nottingham
- United Kingdom
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Kolbeck C, Taccardi N, Paape N, Schulz PS, Wasserscheid P, Steinrück HP, Maier F. Redox chemistry, solubility, and surface distribution of Pt(II) and Pt(IV) complexes dissolved in ionic liquids. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2013.07.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Kolbeck C, Niedermaier I, Deyko A, Lovelock KRJ, Taccardi N, Wei W, Wasserscheid P, Maier F, Steinrück HP. Influence of Substituents and Functional Groups on the Surface Composition of Ionic Liquids. Chemistry 2014; 20:3954-65. [DOI: 10.1002/chem.201304549] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Indexed: 11/10/2022]
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Huck LA, Buriak JM. UV-initiated hydrosilylation on hydrogen-terminated silicon (111): rate coefficient increase of two orders of magnitude in the presence of aromatic electron acceptors. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:16285-16293. [PMID: 23106355 DOI: 10.1021/la3035819] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
UV-initiated (254 nm) hydrosilylation of hexadecene on Si(111)-H has been studied in the presence of various aliphatic and aromatic molecules (additives). Many of these additives cause an enhancement in the pseudo-first-order rate coefficient (k(obs)) of hydrosilylation, some up to 200× faster than observed in neat hexadecene. It is proposed that these additives capture the photoejected electron from the surface, thereby increasing the probability of reaction of the alkene with the surface hole (h(+)), leading to Si-C bond formation. While the ability of these additives to increase k(obs) is related to their reduction potential, aromatic additives are particularly efficient; we suspect this is due to the relatively strong physisorption of the aromatic molecules leading to a favorable geometry for electron transfer. The presence of these additives permits the use of a much lower intensity of UV light (~30 μW/cm(2)), reducing the probability of photodegradation of the monolayer, and maximum coverage can be reached within minutes.
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Affiliation(s)
- Lawrence A Huck
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, AB T6G 2G2, Canada.
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Ulbrich A, Reinmöller M, Beenken WJD, Krischok S. Surface Electronic Structure of [XMIm]Cl Probed by Surface-Sensitive Spectroscopy. Chemphyschem 2012; 13:1718-24. [DOI: 10.1002/cphc.201100972] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 03/19/2012] [Indexed: 11/06/2022]
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13
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Niedermaier I, Kolbeck C, Taccardi N, Schulz PS, Li J, Drewello T, Wasserscheid P, Steinrück HP, Maier F. Organic Reactions in Ionic Liquids Studied by in Situ XPS. Chemphyschem 2012; 13:1725-35. [DOI: 10.1002/cphc.201100965] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Indexed: 11/05/2022]
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Steinrück HP. Recent developments in the study of ionic liquid interfaces using X-ray photoelectron spectroscopy and potential future directions. Phys Chem Chem Phys 2012; 14:5010-29. [DOI: 10.1039/c2cp24087d] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Chiappe C, Pomelli CS, Bardi U, Caporali S. Interface properties of ionic liquids containing metal ions: features and potentialities. Phys Chem Chem Phys 2012; 14:5045-51. [DOI: 10.1039/c2cp24012b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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16
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Kolbeck C, Niedermaier I, Taccardi N, Schulz PS, Maier F, Wasserscheid P, Steinrück HP. Monitoring of Liquid-Phase Organic Reactions by Photoelectron Spectroscopy. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201107402] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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17
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Kolbeck C, Niedermaier I, Taccardi N, Schulz PS, Maier F, Wasserscheid P, Steinrück HP. Monitoring of Liquid-Phase Organic Reactions by Photoelectron Spectroscopy. Angew Chem Int Ed Engl 2011; 51:2610-3. [DOI: 10.1002/anie.201107402] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Indexed: 11/08/2022]
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Sachnov SJ, Schulz PS, Wasserscheid P. A convenient method to access long-chain and functionalised mixed methylphosphonate esters and their application in the synthesis of ionic liquids. Chem Commun (Camb) 2011; 47:11234-6. [PMID: 21927764 DOI: 10.1039/c1cc14490a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new method to synthesise long-chain and functionalised methylphosphonate esters and the corresponding ionic liquids is reported. The synthesis comprises the formation of dialkyl methylphosphonate esters in a S(N)2 reaction followed by the use of these esters as alkylating agents to form the corresponding, new alkyl methylphosphonate ILs.
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Affiliation(s)
- Swetlana J Sachnov
- Department of Chemical and Bioengineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany
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Dabiri M, Salehi P, Bahramnejad M, Baghbanzadeh M. Ecofriendly and efficient procedure for hetero-Michael addition reactions with an acidic ionic liquid as catalyst and reaction medium. MONATSHEFTE FUR CHEMIE 2011. [DOI: 10.1007/s00706-011-0570-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Steinrück HP, Libuda J, Wasserscheid P, Cremer T, Kolbeck C, Laurin M, Maier F, Sobota M, Schulz PS, Stark M. Surface science and model catalysis with ionic liquid-modified materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:2571-2587. [PMID: 21520462 DOI: 10.1002/adma.201100211] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Indexed: 05/30/2023]
Abstract
Materials making use of thin ionic liquid (IL) films as support-modifying functional layer open up a variety of new possibilities in heterogeneous catalysis, which range from the tailoring of gas-surface interactions to the immobilization of molecularly defined reactive sites. The present report reviews recent progress towards an understanding of "supported ionic liquid phase (SILP)" and "solid catalysts with ionic liquid layer (SCILL)" materials at the microscopic level, using a surface science and model catalysis type of approach. Thin film IL systems can be prepared not only ex-situ, but also in-situ under ultrahigh vacuum (UHV) conditions using atomically well-defined surfaces as substrates, for example by physical vapor deposition (PVD). Due to their low vapor pressure, these systems can be studied in UHV using the full spectrum of surface science techniques. We discuss general strategies and considerations of this approach and exemplify the information available from complementary methods, specifically photoelectron spectroscopy and surface vibrational spectroscopy.
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Affiliation(s)
- H-P Steinrück
- Lehrstuhl für Physikalische Chemie 2 and Erlangen Catalysis, Resource Center, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany.
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Cremer T, Stark M, Deyko A, Steinrück HP, Maier F. Liquid/solid interface of ultrathin ionic liquid films: [C1C1Im][Tf2N] and [C8C1Im][Tf2N] on Au(111). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:3662-71. [PMID: 21361299 DOI: 10.1021/la105007c] [Citation(s) in RCA: 134] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Ultrathin films of two imidazolium-based ionic liquids (IL), [C(1)C(1)Im][Tf(2)N] (= 1,3-dimethylimidazolium bis(trifluoromethyl)imide) and [C(8)C(1)Im][Tf(2)N] (= 1-methyl-3-octylimidazolium bis(trifluoromethyl)imide) were prepared on a Au(111) single-crystal surface by physical vapor deposition in ultrahigh vacuum. The adsorption behavior, orientation, and growth were monitored via angle-resolved X-ray photoelectron spectroscopy (ARXPS). Coverage-dependent chemical shifts of the IL-derived core levels indicate that for both ILs the first layer is formed from anions and cations directly in contact with the Au surface in a checkerboard arrangement and that for [C(8)C(1)Im][Tf(2)N] a reorientation of the alkyl chain with increasing coverage is found. For both ILs, geometry models of the first adsorption layer are proposed. For higher coverages, both ILs grow in a layer-by-layer fashion up to thicknesses of at least 9 nm (>10 ML). Moreover, beam damage effects are discussed, which are mainly related to the decomposition of [Tf(2)N](-) anions directly adsorbed at the gold surface.
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Affiliation(s)
- T Cremer
- Lehrstuhl für Physikalische Chemie II and Erlangen Catalysis Resource Center, Friedrich-Alexander-Universität, Erlangen-Nürnberg Egerlandstrasse 3, 91058 Erlangen, Germany
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22
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Kolbeck C, Paape N, Cremer T, Schulz PS, Maier F, Steinrück HP, Wasserscheid P. Ligand effects on the surface composition of Rh-containing ionic liquid solutions used in hydroformylation catalysis. Chemistry 2011; 16:12083-7. [PMID: 20827693 DOI: 10.1002/chem.201000903] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Claudia Kolbeck
- Chair of Physical Chemistry II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91054 Erlangen, Germany
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Hurisso BB, Lovelock KRJ, Licence P. Amino acid-based ionic liquids: using XPS to probe the electronic environment via binding energies. Phys Chem Chem Phys 2011; 13:17737-48. [DOI: 10.1039/c1cp21763a] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Villar-Garcia IJ, Smith EF, Taylor AW, Qiu F, Lovelock KRJ, Jones RG, Licence P. Charging of ionic liquid surfaces under X-ray irradiation: the measurement of absolute binding energies by XPS. Phys Chem Chem Phys 2011; 13:2797-808. [DOI: 10.1039/c0cp01587c] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Cremer T, Kolbeck C, Lovelock KRJ, Paape N, Wölfel R, Schulz PS, Wasserscheid P, Weber H, Thar J, Kirchner B, Maier F, Steinrück HP. Towards a molecular understanding of cation-anion interactions--probing the electronic structure of imidazolium ionic liquids by NMR spectroscopy, X-ray photoelectron spectroscopy and theoretical calculations. Chemistry 2010; 16:9018-33. [PMID: 20658502 DOI: 10.1002/chem.201001032] [Citation(s) in RCA: 213] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Ten [C(8)C(1)Im](+) (1-methyl-3-octylimidazolium)-based ionic liquids with anions Cl(-), Br(-), I(-), [NO(3)](-), [BF(4)](-), [TfO](-), [PF(6)](-), [Tf(2)N](-), [Pf(2)N](-), and [FAP](-) (TfO=trifluoromethylsulfonate, Tf(2)N=bis(trifluoromethylsulfonyl)imide, Pf(2)N=bis(pentafluoroethylsulfonyl)imide, FAP=tris(pentafluoroethyl)trifluorophosphate) and two [C(8)C(1)C(1)Im](+) (1,2-dimethyl-3-octylimidazolium)-based ionic liquids with anions Br(-) and [Tf(2)N](-) were investigated by using X-ray photoelectron spectroscopy (XPS), NMR spectroscopy and theoretical calculations. While (1)H NMR spectroscopy is found to probe very specifically the strongest hydrogen-bond interaction between the hydrogen attached to the C(2) position and the anion, a comparative XPS study provides first direct experimental evidence for cation-anion charge-transfer phenomena in ionic liquids as a function of the ionic liquid's anion. These charge-transfer effects are found to be surprisingly similar for [C(8)C(1)Im](+) and [C(8)C(1)C(1)Im](+) salts of the same anion, which in combination with theoretical calculations leads to the conclusion that hydrogen bonding and charge transfer occur independently from each other, but are both more pronounced for small and more strongly coordinating anions, and are greatly reduced in the case of large and weakly coordinating anions.
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Affiliation(s)
- Till Cremer
- Lehrstuhl für Physikalische Chemie II, Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
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26
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Lovelock KRJ, Villar-Garcia IJ, Maier F, Steinrück HP, Licence P. Photoelectron Spectroscopy of Ionic Liquid-Based Interfaces. Chem Rev 2010; 110:5158-90. [DOI: 10.1021/cr100114t] [Citation(s) in RCA: 236] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Kevin R. J. Lovelock
- School of Chemistry, The University of Nottingham, Nottingham NG7 2RD, U.K., and Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, D-91058 Erlangen, Germany
| | - Ignacio J. Villar-Garcia
- School of Chemistry, The University of Nottingham, Nottingham NG7 2RD, U.K., and Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, D-91058 Erlangen, Germany
| | - Florian Maier
- School of Chemistry, The University of Nottingham, Nottingham NG7 2RD, U.K., and Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, D-91058 Erlangen, Germany
| | - Hans-Peter Steinrück
- School of Chemistry, The University of Nottingham, Nottingham NG7 2RD, U.K., and Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, D-91058 Erlangen, Germany
| | - Peter Licence
- School of Chemistry, The University of Nottingham, Nottingham NG7 2RD, U.K., and Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, D-91058 Erlangen, Germany
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Temperature Dependence of Interactions Between Stable Piperidine-1-yloxyl Derivatives and a Semicrystalline Ionic Liquid. Chemphyschem 2010; 11:2182-90. [DOI: 10.1002/cphc.200900977] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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28
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Strehmel V, Rexhausen H, Strauch P. 2,2,6,6-Tetramethylpiperidine-1-yloxyl bound to the imidazolium ion by an acetamido group for investigation of ionic liquids. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2009.11.124] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Maier F, Cremer T, Kolbeck C, Lovelock KRJ, Paape N, Schulz PS, Wasserscheid P, Steinrück HP. Insights into the surface composition and enrichment effects of ionic liquids and ionic liquid mixtures. Phys Chem Chem Phys 2010; 12:1905-15. [DOI: 10.1039/b920804f] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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30
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Strehmel V, Rexhausen H, Strauch P. Influence of imidazolium bis(trifluoromethylsulfonylimide)s on the rotation of spin probes comprising ionic and hydrogen bonding groups. Phys Chem Chem Phys 2010; 12:1933-40. [DOI: 10.1039/b920586a] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Strehmel V, Lungwitz R, Rexhausen H, Spange S. Relationship between hyperfine coupling constants of spin probes and empirical polarity parameters of some ionic liquids. NEW J CHEM 2010. [DOI: 10.1039/c0nj00253d] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Kolbeck C, Cremer T, Lovelock KRJ, Paape N, Schulz PS, Wasserscheid P, Maier F, Steinrück HP. Influence of different anions on the surface composition of ionic liquids studied using ARXPS. J Phys Chem B 2009; 113:8682-8. [PMID: 19534566 DOI: 10.1021/jp902978r] [Citation(s) in RCA: 159] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Angle-resolved X-ray photoelectron spectroscopy has been used to study the influence of different types of anions on the surface composition of ionic liquids (ILs). We have investigated nine ILs with the same cation, 1-octyl-3-methylimidazolium [C(8)C(1)Im](+), but very different anions. In all cases, an enrichment of the cation alkyl chains is found at the expense of the polar cation head groups and the anions in the first molecular layer. This enhancement effect decreases with increasing size of the anion, which means it is most pronounced for the smallest anions and least pronounced for the largest anions. A simple model is proposed to explain the experimental observations.
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Affiliation(s)
- C Kolbeck
- Lehrstuhl fur Physikalische Chemie II, Lehrstuhl fur Chemische Reaktionstechnik, and Erlangen Catalysis Resource Center, Universitat Erlangen-Nurnberg, Germany
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33
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Lovelock KRJ, Kolbeck C, Cremer T, Paape N, Schulz PS, Wasserscheid P, Maier F, Steinrück HP. Influence of Different Substituents on the Surface Composition of Ionic Liquids Studied Using ARXPS. J Phys Chem B 2009; 113:2854-64. [DOI: 10.1021/jp810637d] [Citation(s) in RCA: 166] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- K. R. J. Lovelock
- Lehrstuhl für Physikalische Chemie II, Lehrstuhl für Chemische Reaktionstechnik, Erlangen Catalysis Resource Center (ECRC), Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - C. Kolbeck
- Lehrstuhl für Physikalische Chemie II, Lehrstuhl für Chemische Reaktionstechnik, Erlangen Catalysis Resource Center (ECRC), Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - T. Cremer
- Lehrstuhl für Physikalische Chemie II, Lehrstuhl für Chemische Reaktionstechnik, Erlangen Catalysis Resource Center (ECRC), Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - N. Paape
- Lehrstuhl für Physikalische Chemie II, Lehrstuhl für Chemische Reaktionstechnik, Erlangen Catalysis Resource Center (ECRC), Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - P. S. Schulz
- Lehrstuhl für Physikalische Chemie II, Lehrstuhl für Chemische Reaktionstechnik, Erlangen Catalysis Resource Center (ECRC), Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - P. Wasserscheid
- Lehrstuhl für Physikalische Chemie II, Lehrstuhl für Chemische Reaktionstechnik, Erlangen Catalysis Resource Center (ECRC), Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - F. Maier
- Lehrstuhl für Physikalische Chemie II, Lehrstuhl für Chemische Reaktionstechnik, Erlangen Catalysis Resource Center (ECRC), Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - H.-P. Steinrück
- Lehrstuhl für Physikalische Chemie II, Lehrstuhl für Chemische Reaktionstechnik, Erlangen Catalysis Resource Center (ECRC), Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
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