"Giant" nitrogen uptake in ionic liquids confined in carbon pores
- Ionic liquids are well known for their high gas absorption capacity. It is shown that this is not a solvent constant, but can be enhanced by another factor of 10 by pore confinement, here of the ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate (EmimOAc) in the pores of carbon materials. A matrix of four different carbon compounds with micro- and mesopores as well as with and without nitrogen doping is utilized to investigate the influence of the carbons structure on the nitrogen uptake in the pore-confined EmimOAc. In general, the absorption is most improved for IL in micropores and in nitrogen-doped carbon. This effect is so large that it is already seen in TGA and DSC experiments. Due to the low vapor pressure of the IL, standard volumetric sorption experiments can be used to quantify details of this effect. It is reasoned that it is the change of the molecular arrangement of the ions in the restricted space of the pores that creates additional free volume to host molecular nitrogen.
Author details: | İpek HarmanliORCiDGND, Nadezda Tarakina, Markus AntoniettiORCiDGND, Martin OschatzORCiDGND |
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DOI: | https://doi.org/10.1021/jacs.1c00783 |
ISSN: | 0002-7863 |
ISSN: | 1520-5126 |
Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/34128662 |
Title of parent work (English): | Journal of the American Chemical Society |
Publisher: | American Chemical Society |
Place of publishing: | Washington |
Publication type: | Article |
Language: | English |
Date of first publication: | 2021/06/15 |
Publication year: | 2021 |
Release date: | 2024/01/08 |
Volume: | 143 |
Issue: | 25 |
Number of pages: | 8 |
First page: | 9377 |
Last Page: | 9384 |
Funding institution: | Max Planck SocietyMax Planck SocietyFoundation CELLEX; Liebig Grant of the German Chemical Industry Fund |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
DDC classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
Peer review: | Referiert |
Publishing method: | Open Access / Hybrid Open-Access |
License (German): | CC-BY - Namensnennung 4.0 International |