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478 results on '"Nockemann, Peter"'

4. All-iron redox flow battery in flow-through and flow-over set-ups: the critical role of cell configuration

Author

Bailey, Josh J., primary, Pahlevaninezhad, Maedeh, additional, Gunaratne, H. Q. Nimal, additional, O’Connor, Hugh, additional, Thompson, Kate, additional, Sharda, Pranav, additional, Kavanagh, Paul, additional, Istrate, Oana M., additional, Glover, Stephen, additional, Klusener, Peter A. A., additional, Roberts, Edward P. L., additional, and Nockemann, Peter, additional

Published
2024
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6. Elucidating the Iron‐Based Ionic Liquid [C4py][FeCl4]: Structural Insights and Potential for Nonaqueous Redox Flow Batteries.

Author

Balischewski, Christian, Bhattacharyya, Biswajit, Bailey, Josh J., Place, Scott D., Nockemann, Peter, Kim, Jiyong, Wedel, Armin, Gahlaut, Shashank, Bald, Ilko, Li, Weiyang, Garcia, Yann, Sperlich, Eric, Günter, Christina, Kelling, Alexandra, and Taubert, Andreas

Subjects
FLOW batteries, IONIC liquids, NONAQUEOUS solvents, REDUCTION potential, IONIC crystals
Abstract

In this study, a low‐melting organic‐inorganic crystalline ionic liquid compound, N‐butyl pyridinium tetrachlorido ferrate (III) is described. The material can easily be synthesized using a one‐pot approach in an ionic liquid medium. Single‐crystal X‐ray diffraction confirms that the basic inorganic block is [FeCl4]−, which is counterbalanced by an N‐butyl pyridinium cation. The compound exhibits a melting point of 37.6 °C by differential scanning calorimetry, which is among the lowest values for a pyridinium‐based metal‐containing ionic liquid. The material shows promising electrochemical behavior at room temperature in both aqueous and nonaqueous solvents, and at elevated temperatures in its pure liquid state. Given its appreciable solubility in both water and acetonitrile, the compound can act as a redox‐active species in a supporting electrolyte for redox flow battery applications. These classes of low‐melting ionic solids with long‐range order and interesting electrochemical applications are potential candidates for a range of green energy storage and harvesting systems. [ABSTRACT FROM AUTHOR]

Published
2024
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12. Taming Tris(bipyridine)ruthenium(II) and Its Reactions in Water by Capture/Release with Shape-Switchable Symmetry-Matched Cyclophanes

Author

Yao, Chaoyi, primary, Lin, Hongyu, additional, Daly, Brian, additional, Xu, Yikai, additional, Singh, Warispreet, additional, Gunaratne, H. Q. Nimal, additional, Browne, Wesley R., additional, Bell, Steven E. J., additional, Nockemann, Peter, additional, Huang, Meilan, additional, Kavanagh, Paul, additional, and de Silva, A. Prasanna, additional

Published
2022
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13. An open-source platform for 3D-printed redox flow battery test cells

Author

O'Connor, Hugh, primary, Bailey, Josh J., additional, Istrate, Oana M., additional, Klusener, Peter A. A., additional, Watson, Rob, additional, Glover, Stephen, additional, Iacoviello, Francesco, additional, Brett, Dan J. L., additional, Shearing, Paul R., additional, and Nockemann, Peter, additional

Published
2022
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15. Spectroscopic Signatures of Hydrogen-Bonding Motifs in Protonic Ionic Liquid Systems: Insights from Diethylammonium Nitrate in the Solid State

Author

Vázquez-Fernández, Isabel, primary, Drużbicki, Kacper, additional, Fernandez-Alonso, Felix, additional, Mukhopadhyay, Sanghamitra, additional, Nockemann, Peter, additional, Parker, Stewart F., additional, Rudić, Svemir, additional, Stana, Simona-Maria, additional, Tomkinson, John, additional, Yeadon, Darius J., additional, Seddon, Kenneth R., additional, and Plechkova, Natalia V., additional

Published
2021
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17. Spectroscopic signatures of hydrogen-bonding motifs in protonic ionic liquid systems: Insights from diethylammonium nitrate in the solid state

Author

Diputación Foral de Gipuzkoa, Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), European Grid Infrastructure, Vázquez-Fernández, Isabel, Drużbick, Kacper, Fernández-Alonso, Félix, Sanghamitra, Mukhopadhyay, Nockemann, Peter, Parker, Stewart F., Rudić, Svemir, Stana, Simona-Maria, Tomkinson, John, Yeadon, Darius J., Seddon, Kenneth R., Plechkova, Natalia V., Diputación Foral de Gipuzkoa, Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), European Grid Infrastructure, Vázquez-Fernández, Isabel, Drużbick, Kacper, Fernández-Alonso, Félix, Sanghamitra, Mukhopadhyay, Nockemann, Peter, Parker, Stewart F., Rudić, Svemir, Stana, Simona-Maria, Tomkinson, John, Yeadon, Darius J., Seddon, Kenneth R., and Plechkova, Natalia V.

Abstract

Diethylammonium nitrate, [N0 0 2 2][NO3], and its perdeuterated analogue, [ND D 2 2] [NO3], were structurally characterized and studied by infrared, Raman, and inelastic neutron scattering (INS) spectroscopy. Using these experimental data along with state-of-the-art computational materials modeling, we report unambiguous spectroscopic signatures of hydrogen-bonding interactions between the two counterions. An exhaustive assignment of the spectral features observed with each technique has been provided, and a number of distinct modes related to NH···O dynamics have been identified. We put a particular emphasis on a detailed interpretation of the high-resolution, broadband INS experiments. In particular, the INS data highlight the importance of conformational degrees of freedom within the alkyl chains, a ubiquitous feature of ionic liquid (IL) systems. These findings also enable an in-depth physicochemical understanding of protonic IL systems, a first and necessary step to the tailoring of hydrogen-bonding networks in this important class of materials.

Published
2021

20. Speciation of uranyl complexes in ionic liquids by optical spectroscopy

Author

Nockemann, Peter, Servaes, Kelly, Van Deun, Rik, Van Hecke, Kristof, Van Meervelt, Luc, Binnemans, Koen, and Gorller-Walrand, Christiane

Subjects
Atomic absorption spectroscopy -- Usage, Coordination compounds -- Research, Coordination compounds -- Chemical properties, Chemistry
Abstract

Uranyl complex dissolved in room-temperature ionic liquids has diagnostic absorption and emission spectra that has allowed the identification of the symmetry and geometry of the complex. The uranyl complexes are examined in imidazolium and pyrrolidinium bis(trifluoromethylsulfonyl)imide ionic liquids.

Published
2007

21. Choline saccharinate and choline acesulfamate: Ionic liquids with low toxicities

Author

Nockemann, Peter, Thijs, Ben, Driesen, Kris, Janssen, Colin R., Van Hecke, Kristof, Van Meervelt, Luc, Kossmann, Simone, and Binnemans, Koen

Subjects
Ionic solutions -- Chemical properties, Choline -- Chemical properties, Chemicals, plastics and rubber industries
Abstract

A general method is described for the synthesis and purification of hydrophilic ionic liquids, choline saccharinate and choline acesulfamate. The analysis has shown that choline saccharinate and choline acesulfamate are ionic liquids with a low toxicity, as these ionic liquids are composed of animal feed additives and of additives for human nutrition.

Published
2007

33. Highly Selective Reduction of α, β -Unsaturated Aldehydes and Ketones under Ambient Conditions using Tetraalkylphosphonium-based Ionic Liquids

Author

Ralphs, Kathryn, McCourt, Éadaoin, Ormandy, Christopher, Carneiro de Souza, Thiago, Nockemann, Peter, Jacquemin, Johan, Manyar, Haresh, School of Chemistry and Chemical Engineering [Belfast], Queen's University [Belfast] (QUB), Physico-chimie des Matériaux et des Electrolytes pour l'Energie (PCM2E), Université de Tours, and Université de Tours (UT)

Subjects
β-Unsaturated aldehydes and ketones, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Selective reduction, α, [CHIM]Chemical Sciences, Mild reaction conditions, Reactions in ionic liquid, Sodium borohydride
Abstract

International audience; An efficient and green protocol for highly selective reduction of α,β‐unsaturated aldehydes and ketones at room temperature is described in a range of ionic liquids, in the absence of noble metal catalysts, by using NaBH4 as reducing agent. Most notably, using [P6,6,6,14][N(CN)2] ionic liquid, in absence of organic solvent, within 10 min, 97% conversion of cinnamaldehyde was achieved with 100% selectivity towards cinnamyl alcohol. The ionic liquid was easily recycled without any noticeable decline in activity. The reduction protocol was further extended to a variety of α,β‐unsaturated aldehydes and ketones.

Published
2018
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34. Highly Selective Reduction of α, β-Unsaturated Aldehydes and Ketones under Ambient Conditions using Tetraalkylphosphonium-based Ionic Liquids

Author

Manyar, Haresh, Ralphs, Kathryn, McCourt, Éadaoin, Nockemann, Peter, and Jacquemin, Johan

Abstract

An efficient and green protocol for highly selective reduction of α,-unsaturated aldehydes and ketones at room temperature is described in a range of ionic liquids, in the absence of noble metal catalysts, by using NaBH4 as reducing agent. Most notably, using [P6,6,6,14][N(CN)2] ionic liquid, in absence of organic solvent, within 10 min, 97% conversion of cinnamaldehyde was achieved with 100% selectivity towards cinnamyl alcohol. The ionic liquid was easily recycled without any noticeable decline in activity. The reduction protocol was further extended to a variety of α,-unsaturated aldehydes and ketones.

Published
2018
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35. Cover Picture: Highly Selective Reduction of α, β -Unsaturated Aldehydes and Ketones under Ambient Conditions using Tetraalkylphosphonium-based Ionic Liquids (42/2018)

Author

Ralphs, Kathryn, McCourt, Éadaoin, Ormandy, Christopher, Carneiro de Souza, Thiago, Nockemann, Peter, Jacquemin, Johan, Manyar, Haresh, Jacquemin, Johan, School of Chemistry and Chemical Engineering [Belfast], Queen's University [Belfast] (QUB), Physico-chimie des Matériaux et des Electrolytes pour l'Energie (PCM2E), Université de Tours, and Université de Tours (UT)

Subjects
[CHIM.ORGA]Chemical Sciences/Organic chemistry, [CHIM] Chemical Sciences, [CHIM]Chemical Sciences, [CHIM.ORGA] Chemical Sciences/Organic chemistry, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

41. Long-lived near-infrared luminescent lanthanide complexes of imidodiphosphinate 'shell' ligands

Author

Bassett, Andrew P., Van Deun, Rik, Nockemann, Peter, Kariuki, Benson M, Van Meervelt, Luc, Glover, Peter B., Van Hecke, Kristof, and Pikramenou, Zoe

Subjects
Rare earth metals -- Electric properties, Chemical synthesis -- Research, Neodymium -- Electric properties, Erbium -- Electric properties, Chemistry
Abstract

The synthesis and characterization of near-infrared (NIR) emitting complexes of Nd(III), Er(III) and Yd(III) based on hexacoordinate lanthanide ions with an aryl functionalized imidodiphosphinate ligand, tpip, are described. The results indicate the effective shielding of the lanthanide by the twelve phenyl groups of the tpip ligands and the reduction of high-energy vibrations in close proximity to the lanthanide, which are the two important features in the design of NIR emitting lanthanide complexes.

Published
2005

46. Cover Feature: Spontaneous Substitutions at Phosphorus Trihalides in Imidazolium Halide Ionic Liquids: Grotthuss Diffusion of Anions? (Chem. Eur. J. 61/2018)

Author

Hollóczki, Oldamur, primary, Wolff, Alexander, additional, Pallmann, Julia, additional, Whiteside, Rachel E., additional, Hartley, Jennifer, additional, Grasser, Matthias A., additional, Nockemann, Peter, additional, Brunner, Eike, additional, Doert, Thomas, additional, and Ruck, Michael, additional

Published
2018
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47. Low-Temperature Tailoring of Copper-Deficient Cu3–xP—Electric Properties, Phase Transitions, and Performance in Lithium-Ion Batteries

Author

Wolff, Alexander, primary, Doert, Thomas, additional, Hunger, Jens, additional, Kaiser, Martin, additional, Pallmann, Julia, additional, Reinhold, Romy, additional, Yogendra, Sivatmeehan, additional, Giebeler, Lars, additional, Sichelschmidt, Jörg, additional, Schnelle, Walter, additional, Whiteside, Rachel, additional, Gunaratne, H. Q. Nimal, additional, Nockemann, Peter, additional, Weigand, Jan J., additional, Brunner, Eike, additional, and Ruck, Michael, additional

Published
2018
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48. Influence of the anion on the electrical conductivity and glass formation of 1-butyl-3-methylimidazolium ionic liquids.

Author

Leys, Jan, Rajesh, Ravindran Nair, Menon, Preethy Chirukandath, Glorieux, Christ, Longuemart, Stéphane, Nockemann, Peter, Pellens, Michael, and Binnemans, Koen

Subjects
ANIONS, ELECTRIC conductivity, IONIC liquids, GLASS, CATIONS, ACTIVATION (Chemistry)
Abstract

Six ionic liquids based on the 1-butyl-3-methylimidazolium cation have been studied. As anions Cl-, Br-, I-, [NCS]-, [N(CN)2]-, and [BF4]- were selected. The electrical conductivities were determined between 173 and 393 K based on impedance measurements in the frequency range from 0.1 to 107 Hz. The electrical conductivity increases, whereas the glass transition temperature, the fragility, and the low temperature activation energy decrease with increasing anion size. The results can be understood from the changing anion-cation interaction strength with changing anion size and from the energy landscape interpretation of the glass transition dynamics. [ABSTRACT FROM AUTHOR]

Published
2010
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49. Temperature dependence of the electrical conductivity of imidazolium ionic liquids.

Author

Leys, Jan, Wübbenhorst, Michael, Preethy Menon, Chirukandath, Rajesh, Ravindran, Thoen, Jan, Glorieux, Christ, Nockemann, Peter, Thijs, Ben, Binnemans, Koen, and Longuemart, Stéphane

Subjects
ELECTRIC conductivity, TEMPERATURE, PHASE transitions, POLYWATER, PERMEABILITY, GLASS transition temperature
Abstract

The electrical conductivities of 1-alkyl-3-methylimidazolium tetrafluoroborate ionic liquids and of 1-hexyl-3-methylimidazolium ionic liquids with different anions were determined in the temperature range between 123 and 393 K on the basis of dielectric measurements in the frequency range from 1 to 107 Hz. Most of the ionic liquids form a glass and the conductivity values obey the Vogel-Fulcher-Tammann equation. The glass transition temperatures are increasing with increasing length of the alkyl chain. The fragility is weakly dependent on the alkyl chain length but is highly sensitive to the structure of the anion. [ABSTRACT FROM AUTHOR]

Published
2008
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50. A facile green synthetic route for the preparation of highly active γ-Al2O3 from aluminum foil waste

Author

Osman, Ahmed I., Abu-Dahrieh, Jehad K., McLaren, Mathew, Laffir, Fathima R., Nockemann, Peter, Rooney, David, Osman, Ahmed I., Abu-Dahrieh, Jehad K., McLaren, Mathew, Laffir, Fathima R., Nockemann, Peter, and Rooney, David

Abstract

peer-reviewed, A novel green preparation route to prepare nano-mesoporous γ-Al2O3 from AlCl3.6H2O derived from aluminum foil waste and designated as ACFL550 is demonstrated, which showed higher surface area, larger pore volume, stronger acidity and higher surface area compared to γ-Al2O3 that is produced from the commercial AlCl3 precursor, AC550. The produced crystalline AlCl3.6H2O and Al(NO3)3.9H2O in the first stage of the preparation method were characterized by single-crystal XRD, giving two crystal structures, a trigonal (R-3c) and monoclinic (P21/c) structure, respectively. EDX analysis showed that ACFL550 had half the chlorine content (Cl%) relative to AC550, which makes ACFL550 a promising catalyst in acid-catalysed reactions. Pure and modified ACFL550 and AC550 were applied in acidcatalysed reactions, the dehydration of methanol to dimethyl ether and the total methane oxidation reactions, respectively. It was found that ACFL550 showed higher catalytic activity than AC550. This work opens doors for the preparation of highly active and well-structured nano-mesoporous alumina catalysts/supports from aluminum foil waste and demonstrates its application in acid-catalysed reactions., PUBLISHED, peer-reviewed

Published
2017

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