Adsorption structure of dimethyl ether on silicalite-1 zeolite determined using single-crystal X-ray diffraction

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Abstract

The adsorption structures of dimethyl ether (DME) on silicalite-1 zeolite (MFI-type) are determined using single-crystal X-ray diffraction. The structure of low-loaded DME-silicalite-1 indicates that all DME molecules are located in the sinusoidal channel, which is the most stable sorption site based on the van der Waals interaction between DME and the framework. The configuration of guest molecules (linear or bent) plays an important role in determining where the stable sorption site is in the pore system of MFI-type zeolites. Bent molecules favor the sinusoidal channel, while linear molecules favor the straight channel. The contribution of DME-DME interactions is considerable in the high-loaded DME-silicalite-1 structure.

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Fujiyama, S., Seino, S., Kamiya, N., Nishi, K., & Yokomori, Y. (2014). Adsorption structure of dimethyl ether on silicalite-1 zeolite determined using single-crystal X-ray diffraction. Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 70(5), 856–863. https://doi.org/10.1107/S2052520614015911

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