Accelerated Diffusion of Long-Chain Alkanes between Nanosized Cavities

Hervé Jobic; Alain Méthivier; Georg Ehlers; Bela Farago; Wolfgang Haeussler

doi:10.1002/anie.200352691

Accelerated Diffusion of Long-Chain Alkanes between Nanosized Cavities

Hervé Jobic, Alain Méthivier, Georg Ehlers, Bela Farago, Wolfgang Haeussler

Research output: Contribution to journal › Article › peer-review

54 Scopus citations

Abstract

An anomalous transport effect has been found by neutron spin echo measurements on n-alkanes diffusing in a small-pore zeolite: the diffusivity decreases from C₁ to C₈, but rises for C₁₀ and has a maximum at C₁₂, then decreases again. This confirms the existence of the "window effect" proposed thirty years ago by Gorring. The picture shows schematically how one end of a C₁₂ chain extends through a zeolite window, lowering the barrier to diffusion.

Original language	English
Pages (from-to)	364-366
Number of pages	3
Journal	Angewandte Chemie - International Edition
Volume	43
Issue number	3
DOIs	https://doi.org/10.1002/anie.200352691
State	Published - Jan 5 2004
Externally published	Yes

Keywords

Alkanes
Diffusion
Neutron scattering
Zeolites

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10.1002/anie.200352691

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abstract = "An anomalous transport effect has been found by neutron spin echo measurements on n-alkanes diffusing in a small-pore zeolite: the diffusivity decreases from C1 to C8, but rises for C10 and has a maximum at C12, then decreases again. This confirms the existence of the {"}window effect{"} proposed thirty years ago by Gorring. The picture shows schematically how one end of a C12 chain extends through a zeolite window, lowering the barrier to diffusion.",

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AU - Jobic, Hervé

AU - Méthivier, Alain

AU - Ehlers, Georg

AU - Farago, Bela

AU - Haeussler, Wolfgang

PY - 2004/1/5

Y1 - 2004/1/5

N2 - An anomalous transport effect has been found by neutron spin echo measurements on n-alkanes diffusing in a small-pore zeolite: the diffusivity decreases from C1 to C8, but rises for C10 and has a maximum at C12, then decreases again. This confirms the existence of the "window effect" proposed thirty years ago by Gorring. The picture shows schematically how one end of a C12 chain extends through a zeolite window, lowering the barrier to diffusion.

AB - An anomalous transport effect has been found by neutron spin echo measurements on n-alkanes diffusing in a small-pore zeolite: the diffusivity decreases from C1 to C8, but rises for C10 and has a maximum at C12, then decreases again. This confirms the existence of the "window effect" proposed thirty years ago by Gorring. The picture shows schematically how one end of a C12 chain extends through a zeolite window, lowering the barrier to diffusion.

KW - Alkanes

KW - Diffusion

KW - Neutron scattering

KW - Zeolites

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Accelerated Diffusion of Long-Chain Alkanes between Nanosized Cavities

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Keywords

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