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459 results on '"Hallett, Jason P."'

57. Contributors

Author

Bochek, Aleksandr M., primary, Chistov, Vyacheslav, additional, Dikareva, Julia, additional, Esipova, Elena, additional, Gräsvik, John, additional, Griffith, Jeraime, additional, Hallett, Jason P., additional, Kashirskii, Dmitrii A., additional, Kuzmina, Olga, additional, McIntosh, Alastair J.S., additional, Murav'ev, Anton A., additional, Novoselov, Nikolai P., additional, Popov, Konstantin, additional, Prado, Raquel, additional, Sashina, Elena S., additional, Vendilo, Andrei, additional, and Weber, Cameron C., additional

Published
2016
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60. Linking the the thermal and electronic properties of functional dicationic salts with their molecular structures

Author

Clarke, Coby J., Morgan, Patrick J., Hallett, Jason P., and Licence, Peter

Abstract

The two major properties that underpin ionic liquids are tunability and the potential to create task-specific media. Together, these properties allow ionic liquids to surpass the roles long held by traditional molecular solvents. However, at elevated temperatures or under prolonged heating, the structural components that impart such properties decompose or degrade. Dicationic pyridine salts present new opportunities to extend functionality and tunability to high temperatures because they are coordinating and thermally robust. In this work, we present three structurally related series of dicationic pyridine salts, which have been characterized by a wide array of techniques to link thermal and electronic properties to structural variation. The phase transitions and thermal stabilities of the salts were significantly influenced by small structural changes, and several new candidates for high-temperature-based applications were identified. The electron density, and therefore the electron donating ability, of the pyridine functional group could also be controlled by structural variation of cations and anions. Therefore, dicationic pyridine salts are highly tunable choices for task-specific solvents at elevated temperatures. Importantly, thermally robust solvents not only extend operational ranges but also reduce the need to replace or replenish solvents that degrade over time at temperatures commonly employed in industrial settings (i.e., 150−200 °C); solvent lifetimes are extended, and production is reduced. This is a critical requirement for complex media such as ionic liquids, which have high economic and environmental production costs.

Published
2021

65. Thermolysis of Organofluoroborate Ionic Liquids to NHC-Organofluoroborates

Author

Licence, Peter, Clarke, Coby J., Richardson, Nathan, Firth, Anton E.J., and Hallett, Jason P.

Subjects
Ionic liquids, Thermolysis, Organofluoroborates, Direct insertion mass spectrometry, Tetrafluoroborates
Abstract

A range of dialkylimidazolium organotrifluoroborate ionic liquids were prepared by anion metathesis from newly available potassium organotrifluoroborate salts, and their physical properties were characterized by TGA, DSC, and STA. Thermal decomposition was subsequently investigated under vacuum with direct insertion mass spectrometry to determine whether thermolysis was a viable route to prepare N-heterocyclic carbene organofluoroborates, which are an important class of emerging compounds. Several key targets were identified, which highlighted the potential to shortcut complex synthetic methodologies otherwise required to access such molecules.

Published
2020

77. An experimental approach probing the conformational transitions and energy landscape of antibodies: a glimmer of hope for reviving lost therapeutic candidates using ionic liquid

Author

Shmool, Talia A., primary, Martin, Laura K., additional, Bui-Le, Liem, additional, Moya-Ramirez, Ignacio, additional, Kotidis, Pavlos, additional, Matthews, Richard P., additional, Venter, Gerhard A., additional, Kontoravdi, Cleo, additional, Polizzi, Karen M., additional, and Hallett, Jason P., additional

Published
2021
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