An unusual slowdown of fast diffusion in a room temperature ionic liquid confined in mesoporous carbon

S. M. Chathoth; E. Mamontov; P. F. Fulvio; X. Wang; G. A. Baker; S. Dai; D. J. Wesolowski

doi:10.1209/0295-5075/102/16004

An unusual slowdown of fast diffusion in a room temperature ionic liquid confined in mesoporous carbon

S. M. Chathoth, E. Mamontov, P. F. Fulvio, X. Wang, G. A. Baker, S. Dai, D. J. Wesolowski

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Abstract

Using quasielastic neutron scattering in the temperature range from 290 to 350 K, we show that the diffusive motions in a room temperature ionic liquid [H₂NC(dma)₂][BETI] become faster for a fraction of cations when the liquid is confined in a mesoporous carbon. This applies to both the localized and long-range translational diffusive motions of the highly mobile cations, although the former exhibit an unusual trend of slowing-down as the temperature is increased, until the localized diffusivity is reduced to the bulk ionic liquid value at a temperature of 350 K.

Original language	English
Article number	16004
Journal	EPL
Volume	102
Issue number	1
DOIs	https://doi.org/10.1209/0295-5075/102/16004
State	Published - Apr 2013

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abstract = "Using quasielastic neutron scattering in the temperature range from 290 to 350 K, we show that the diffusive motions in a room temperature ionic liquid [H2NC(dma)2][BETI] become faster for a fraction of cations when the liquid is confined in a mesoporous carbon. This applies to both the localized and long-range translational diffusive motions of the highly mobile cations, although the former exhibit an unusual trend of slowing-down as the temperature is increased, until the localized diffusivity is reduced to the bulk ionic liquid value at a temperature of 350 K.",

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AU - Chathoth, S. M.

AU - Mamontov, E.

AU - Fulvio, P. F.

AU - Wang, X.

AU - Baker, G. A.

AU - Dai, S.

AU - Wesolowski, D. J.

PY - 2013/4

Y1 - 2013/4

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AB - Using quasielastic neutron scattering in the temperature range from 290 to 350 K, we show that the diffusive motions in a room temperature ionic liquid [H2NC(dma)2][BETI] become faster for a fraction of cations when the liquid is confined in a mesoporous carbon. This applies to both the localized and long-range translational diffusive motions of the highly mobile cations, although the former exhibit an unusual trend of slowing-down as the temperature is increased, until the localized diffusivity is reduced to the bulk ionic liquid value at a temperature of 350 K.

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An unusual slowdown of fast diffusion in a room temperature ionic liquid confined in mesoporous carbon

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