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The structure and dynamics of bottlebrushes: Simulation and experimental studies combined. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Markiewicz R, Klimaszyk A, Jarek M, Taube M, Florczak P, Kempka M, Fojud Z, Jurga S. Influence of Alkyl Chain Length on Thermal Properties, Structure, and Self-Diffusion Coefficients of Alkyltriethylammonium-Based Ionic Liquids. Int J Mol Sci 2021; 22:5935. [PMID: 34073046 PMCID: PMC8198313 DOI: 10.3390/ijms22115935] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 05/24/2021] [Accepted: 05/25/2021] [Indexed: 12/13/2022] Open
Abstract
The application of ionic liquids (ILs) has grown enormously, from their use as simple solvents, catalysts, media in separation science, or electrolytes to that as task-specific, tunable molecular machines with appropriate properties. A thorough understanding of these properties and structure-property relationships is needed to fully exploit their potential, open new directions in IL-based research and, finally, properly implement the appropriate applications. In this work, we investigated the structure-properties relationships of a series of alkyltriethylammonium bis(trifluoromethanesulfonyl)imide [TEA-R][TFSI] ionic liquids in relation to their thermal behavior, structure organization, and self-diffusion coefficients in the bulk state using DSC, FT-IR, SAXS, and NMR diffusometry techniques. The phase transition temperatures were determined, indicating alkyl chain dependency. Fourier-transformed infrared spectroscopy studies revealed the structuration of the ionic liquids along with alkyl chain elongation. SAXS experiments clearly demonstrated the existence of polar/non-polar domains. The alkyl chain length influenced the expansion of the non-polar domains, leading to the expansion between cation heads in polar regions of the structured IL. 1H NMR self-diffusion coefficients indicated that alkyl chain elongation generally caused the lowering of the self-diffusion coefficients. Moreover, we show that the diffusion of anions and cations of ILs is similar, even though they vary in their size.
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Affiliation(s)
- Roksana Markiewicz
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej str. 3, 61-614 Poznań, Poland; (M.J.); (P.F.); (M.K.); (S.J.)
| | - Adam Klimaszyk
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej str. 3, 61-614 Poznań, Poland; (M.J.); (P.F.); (M.K.); (S.J.)
- Department of Macromolecular Physics, Faculty of Physics, Adam Mickiewicz University, Uniwersytetu Poznańskiego str. 2, 61-614 Poznań, Poland; (M.T.); (Z.F.)
| | - Marcin Jarek
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej str. 3, 61-614 Poznań, Poland; (M.J.); (P.F.); (M.K.); (S.J.)
| | - Michał Taube
- Department of Macromolecular Physics, Faculty of Physics, Adam Mickiewicz University, Uniwersytetu Poznańskiego str. 2, 61-614 Poznań, Poland; (M.T.); (Z.F.)
| | - Patryk Florczak
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej str. 3, 61-614 Poznań, Poland; (M.J.); (P.F.); (M.K.); (S.J.)
| | - Marek Kempka
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej str. 3, 61-614 Poznań, Poland; (M.J.); (P.F.); (M.K.); (S.J.)
- Department of Macromolecular Physics, Faculty of Physics, Adam Mickiewicz University, Uniwersytetu Poznańskiego str. 2, 61-614 Poznań, Poland; (M.T.); (Z.F.)
| | - Zbigniew Fojud
- Department of Macromolecular Physics, Faculty of Physics, Adam Mickiewicz University, Uniwersytetu Poznańskiego str. 2, 61-614 Poznań, Poland; (M.T.); (Z.F.)
| | - Stefan Jurga
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej str. 3, 61-614 Poznań, Poland; (M.J.); (P.F.); (M.K.); (S.J.)
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