101
|
Buchner F, Forster-Tonigold K, Uhl B, Alwast D, Wagner N, Farkhondeh H, Gross A, Behm RJ. Toward the microscopic identification of anions and cations at the ionic liquid|Ag(111) interface: a combined experimental and theoretical investigation. ACS NANO 2013; 7:7773-84. [PMID: 23944966 DOI: 10.1021/nn4026417] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The interaction between an adsorbed 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, [BMP][TFSA], ionic liquid (IL) layer and a Ag(111) substrate, under ultrahigh-vacuum conditions, was investigated in a combined experimental and theoretical approach, by high-resolution scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and dispersion-corrected density functional theory calculations (DFT-D). Most importantly, we succeeded in unambiguously identifying cations and anions in the adlayer by comparing experimental images with submolecular resolution and simulated STM images based on DFT calculations, and these findings are in perfect agreement with the 1:1 ratio of anions and cations adsorbed on the metal derived from XPS measurements. Different adlayer phases include a mobile 2D liquid phase at room temperature and two 2D solid phases at around 100 K, i.e., a 2D glass phase with short-range order and some residual, but very limited mobility and a long-range ordered 2D crystalline phase. The mobility in the different adlayer phases, including melting of the 2D crystalline phase, was evaluated by dynamic STM imaging. The DFT-D calculations show that the interaction with the substrate is composed of mainly van der Waals and weak electrostatic (dipole-induced dipole) interactions and that upon adsorption most of the charge remains at the IL, leading to attractive electrostatic interactions between the adsorbed species.
Collapse
Affiliation(s)
- Florian Buchner
- Helmholtz Institute Ulm - Electrochemical Energy Storage, Albert-Einstein-Allee 11, D-89081 Ulm, Germany
| | | | | | | | | | | | | | | |
Collapse
|
102
|
Rostamizadeh S, Nojavan M, Aryan R, Isapoor E, Azad M. Amino acid-based ionic liquid immobilized on α-Fe2O3-MCM-41: An efficient magnetic nanocatalyst and recyclable reaction media for the synthesis of quinazolin-4(3H)-one derivatives. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcata.2013.04.002] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
103
|
Luza L, Gual A, Eberhardt D, Teixeira SR, Chiaro SSX, Dupont J. “Imprinting” Catalytically Active Pd Nanoparticles onto Ionic-Liquid-Modified Al2O3Supports. ChemCatChem 2013. [DOI: 10.1002/cctc.201300123] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
104
|
Kusche M, Enzenberger F, Bajus S, Niedermeyer H, Bösmann A, Kaftan A, Laurin M, Libuda J, Wasserscheid P. Enhanced Activity and Selectivity in Catalytic Methanol Steam Reforming by Basic Alkali Metal Salt Coatings. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209758] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
105
|
Kusche M, Enzenberger F, Bajus S, Niedermeyer H, Bösmann A, Kaftan A, Laurin M, Libuda J, Wasserscheid P. Enhanced activity and selectivity in catalytic methanol steam reforming by basic alkali metal salt coatings. Angew Chem Int Ed Engl 2013; 52:5028-32. [PMID: 23554090 PMCID: PMC4648027 DOI: 10.1002/anie.201209758] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Indexed: 11/12/2022]
Affiliation(s)
- Matthias Kusche
- Lehrstuhl für Chemische Reaktionstechnik and Erlangen Catalysis Resource Center, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | | | | | | | | | | | | | | | | |
Collapse
|
106
|
Markovits IIE, Eger WA, Yue S, Cokoja M, Münchmeyer CJ, Zhang B, Zhou MD, Genest A, Mink J, Zang SL, Rösch N, Kühn FE. Activation of Hydrogen Peroxide by Ionic Liquids: Mechanistic Studies and Application in the Epoxidation of Olefins. Chemistry 2013; 19:5972-9. [DOI: 10.1002/chem.201203208] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2012] [Indexed: 11/10/2022]
|
107
|
Palomar J, Lemus J, Alonso-Morales N, Bedia J, Gilarranz MA, Rodriguez JJ. Encapsulated ionic liquids (ENILs): from continuous to discrete liquid phase. Chem Commun (Camb) 2013; 48:10046-8. [PMID: 22935733 DOI: 10.1039/c2cc35291e] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Encapsulated ionic liquid (ENIL) material was developed, consisting of ionic liquid (IL) introduced into carbon submicrocapsules. ENILs contain >85% w/w of IL but discretized in submicroscopic encapsulated drops, drastically increasing the surface contact area with respect to the neat fluid. ENIL materials were here tested for gas separation processes, obtaining a drastic increase in mass transfer rate.
Collapse
Affiliation(s)
- Jose Palomar
- Seccion de Ingenieria Quimica, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
| | | | | | | | | | | |
Collapse
|
108
|
Schernich S, Laurin M, Lykhach Y, Steinrück HP, Tsud N, Skála T, Prince KC, Taccardi N, Matolín V, Wasserscheid P, Libuda J. Functionalization of Oxide Surfaces through Reaction with 1,3-Dialkylimidazolium Ionic Liquids. J Phys Chem Lett 2013; 4:30-35. [PMID: 26291207 DOI: 10.1021/jz301856a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Practical applications of ionic liquids (ILs) often involve IL/oxide interfaces, but little is known regarding their interfacial chemistry. The unusual physicochemical properties of ILs, including their exceptionally low vapor pressure, provide access to such interfaces using a surface science approach in ultrahigh vacuum (UHV). We have applied synchrotron radiation photoelectron spectroscopy (SR-PES) to the study of a thin film of the ionic liquid [C6C1Im][Tf2N] prepared in situ in UHV on ordered stoichiometric CeO2(111) and partially reduced CeO2-x. On the partially reduced surface, we mostly observe decomposition of the anion. On the stoichiometric CeO2(111) surface, however, a layer of surface-anchored organic products with high thermal stability is formed upon reaction of the cation. The suggested acid-base reaction pathway may provide well-defined functionalized IL/solid interfaces on basic oxides.
Collapse
Affiliation(s)
| | | | | | | | - Nataliya Tsud
- ‡Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, V Holešovičkách 2, 18000 Prague 8, Czech Republic
| | - Tomáš Skála
- ‡Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, V Holešovičkách 2, 18000 Prague 8, Czech Republic
| | - Kevin C Prince
- §Sincrotrone Trieste SCpA, Strada Statale 14, km163.5,34149 Basovizza-Trieste, Italy
| | | | - Vladimír Matolín
- ‡Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, V Holešovičkách 2, 18000 Prague 8, Czech Republic
| | | | | |
Collapse
|
109
|
Zhang B, Su H, Gu X, Zhang Y, Wang P, Li X, Zhang X, Wang H, Yang X, Zeng S. Trapping the catalyst working state by amber-inspired hybrid material to reveal the cobalt nanostructure evolution in clean liquid fuel synthesis. Catal Sci Technol 2013. [DOI: 10.1039/c3cy00366c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
110
|
|
111
|
Nassor EC, Tristão JC, dos Santos EN, Moura FC, Lago RM, Araujo MH. Ionic liquid layer on Pd/C catalyst: Membrane-like effect on the selectivity for multistep hydrogenation reactions. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcata.2012.05.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
112
|
Fabrication of aluminum-doped α-Ni(OH)2 with hierarchical architecture and its largely enhanced electrocatalytic performance. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.07.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
113
|
|
114
|
Miller SF, Friedrich HB, Holzapfel CW. The Effects of SCILL Catalyst Modification on the Competitive Hydrogenation of 1-Octyne and 1,7-Octadiene versus 1-Octene. ChemCatChem 2012. [DOI: 10.1002/cctc.201100482] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
115
|
Sobota M, Schernich S, Schulz H, Hieringer W, Paape N, Wasserscheid P, Görling A, Laurin M, Libuda J. Preparation and characterization of ultrathin [Ru(CO)3Cl2]2 and [BMIM][Tf2N] films on Al2O3/NiAl(110) under UHV conditions. Phys Chem Chem Phys 2012; 14:10603-12. [PMID: 22760015 DOI: 10.1039/c2cp40697g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Towards a better understanding of the interface chemistry of ionic liquid (IL) thin film catalytic systems we have applied a rigorous surface science model approach. For the first time, a model homogeneous catalyst has been prepared under ultrahigh vacuum conditions. The catalyst, di-μ-chlorobis(chlorotricarbonylruthenium) [Ru(CO)(3)Cl(2)](2), and the solvent, the IL 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [BMIM][Tf(2)N], have been deposited by physical vapor deposition onto an alumina model support [Al(2)O(3)/NiAl(110)]. First, the interaction between thin films of [Ru(CO)(3)Cl(2)](2) and the support is investigated. Then, the ruthenium complex is co-deposited with the IL and the influence of the solvent on the catalyst is discussed. D(2)O, which is a model reactant, is further added. Growth, surface interactions, and mutual interactions in the thin films are studied with IRAS in combination with density functional (DFT) calculations. At 105 K, molecular adsorption of [Ru(CO)(3)Cl(2)](2) is observed on Al(2)O(3)/NiAl(110). The IRAS spectra of the binary [Ru(CO)(3)Cl(2)](2) + [BMIM][Tf(2)N] and ternary [Ru(CO)(3)Cl(2)](2) + [BMIM][Tf(2)N] + D(2)O show every characteristic band of the individual components. Above 223 K, partial decomposition of the ruthenium complex leads to species of molecular nature attributed to Ru(CO) and Ru(CO)(2) surface species. Formation of metallic ruthenium clusters occurs above 300 K and the model catalyst decomposes further at higher temperatures. Neither the presence of the IL nor of D(2)O prevents this partial decomposition of [Ru(CO)(3)Cl(2)](2) on alumina.
Collapse
Affiliation(s)
- Marek Sobota
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, D-91058 Erlangen, Germany
| | | | | | | | | | | | | | | | | |
Collapse
|
116
|
Licence P. In-situ-XPS-Studien von Reaktionen ionischer Flüssigkeiten: Einblicke in organische Reaktionsmechanismen. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
117
|
Licence P. In Situ XPS Monitoring of Bulk Ionic Liquid Reactions: Shedding Light on Organic Reaction Mechanisms. Angew Chem Int Ed Engl 2012; 51:4789-91. [DOI: 10.1002/anie.201201070] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Indexed: 11/08/2022]
|
118
|
Peñalber CY, Baldelli S. Observation of Charge Inversion of an Ionic Liquid at the Solid Salt-Liquid Interface by Sum Frequency Generation Spectroscopy. J Phys Chem Lett 2012; 3:844-847. [PMID: 26286408 DOI: 10.1021/jz3000917] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Sum frequency generation (SFG) vibrational spectroscopy of the ionic liquid, 1-butyl-3-methylimidazolium dicyanamide [BMIM][DCA], in contact with two different solid salt surfaces, BaF2(111) single crystal and solid NaCl{100}, are discussed in this Letter. This investigation describes the nature of an ionic liquid-(solid) salt interface using SFG, contributing a new understanding to the molecular-level interactions involved in salts, which are conceptually similar compounds (of purely ionic character) but of different physical properties (liquid versus solid at room temperature). Results show the presence of [BMIM](+) at the NaCl{100} surface and [DCA](-) at the BaF2(111) surface. [BMIM](+) cations adhere closely via Coulombic interactions to the negatively charged NaCl{100} surface, while [DCA](-) anions subsequently have a strong electrostatic affinity to the positively charged BaF2(111) surface. Ions of the ionic liquid adsorb to the solid salt surface to form a Helmholtz-like electric double layer.
Collapse
Affiliation(s)
- Chariz Y Peñalber
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
| | - Steven Baldelli
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
| |
Collapse
|
119
|
Enhancement of molecular shape selectivity by in situ anion-exchange in poly(octadecylimidazolium) silica column. J Chromatogr A 2012; 1232:116-22. [DOI: 10.1016/j.chroma.2011.10.065] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Revised: 10/19/2011] [Accepted: 10/21/2011] [Indexed: 11/19/2022]
|
120
|
Men S, Hurisso BB, Lovelock KRJ, Licence P. Does the influence of substituents impact upon the surface composition of pyrrolidinium-based ionic liquids? An angle resolved XPS study. Phys Chem Chem Phys 2012; 14:5229-38. [DOI: 10.1039/c2cp40262a] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
121
|
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]
|
122
|
Cremer T, Wibmer L, Calderón SK, Deyko A, Maier F, Steinrück HP. Interfaces of ionic liquids and transition metal surfaces—adsorption, growth, and thermal reactions of ultrathin [C1C1Im][Tf2N] films on metallic and oxidised Ni(111) surfaces. Phys Chem Chem Phys 2012; 14:5153-63. [DOI: 10.1039/c2cp40278e] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
123
|
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]
|
124
|
Peñalber CY, Grenoble Z, Baker GA, Baldelli S. Surface characterization of imidazolium-based ionic liquids with cyano-functionalized anions at the gas–liquid interface using sum frequency generation spectroscopy. Phys Chem Chem Phys 2012; 14:5122-31. [DOI: 10.1039/c2cp23920e] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
125
|
Scholten JD, Leal BC, Dupont J. Transition Metal Nanoparticle Catalysis in Ionic Liquids. ACS Catal 2011. [DOI: 10.1021/cs200525e] [Citation(s) in RCA: 288] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jackson D. Scholten
- Laboratory of Molecular Catalysis, Institute of Chemistry, UFRGS, Avenida Bento Gonçalves, 9500 Porto Alegre,
91501-970 RS Brazil
| | - Bárbara Caroline Leal
- Laboratory of Molecular Catalysis, Institute of Chemistry, UFRGS, Avenida Bento Gonçalves, 9500 Porto Alegre,
91501-970 RS Brazil
| | - Jairton Dupont
- Laboratory of Molecular Catalysis, Institute of Chemistry, UFRGS, Avenida Bento Gonçalves, 9500 Porto Alegre,
91501-970 RS Brazil
| |
Collapse
|
126
|
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]
|
127
|
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]
|