On the Dynamic Interaction of n-Butane with Imidazolium-Based Ionic Liquids

Bhuin RG, Winter L, Lexow M, Maier F, Steinrück HP (2020)

Publication Type: Journal article

Publication year: 2020

Journal

DOI: 10.1002/anie.202005991

Abstract

The impact of a reactant from the gas phase on the surface of a liquid and its transfer through this gas/liquid interface are crucial for various concepts applying ionic liquids (ILs) in catalysis. We investigated the first step of the adsorption dynamics of n-butane on a series of 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ILs ([CnC1Im][Tf2N]; n=1, 2, 3, 8). Using a supersonic molecular beam in ultra-high vacuum, the trapping of n-butane on the frozen ILs was determined as a function of surface temperature, between 90 and 125 K. On the C8- and C3-ILs, n-butane adsorbs at 90 K with an initial trapping probability of ≈0.89. The adsorption energy increases with increasing length of the IL alkyl chain, whereas the ionic headgroups seem to interact only weakly with n-butane. The absence of adsorption on the C1- and C2-ILs is attributed to a too short residence time on the IL surface to form nuclei for condensation even at 90 K.

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How to cite

APA:

Bhuin, R.G., Winter, L., Lexow, M., Maier, F., & Steinrück, H.-P. (2020). On the Dynamic Interaction of n-Butane with Imidazolium-Based Ionic Liquids. Angewandte Chemie International Edition. https://dx.doi.org/10.1002/anie.202005991

MLA:

Bhuin, Radha Gobinda, et al. "On the Dynamic Interaction of n-Butane with Imidazolium-Based Ionic Liquids." Angewandte Chemie International Edition (2020).

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