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Probing locations of organic structure-directing agents (OSDAs) and host-guest interactions in CHA-type SAPO-34/44
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
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Number of Authors: 72018 (English)In: Microporous and Mesoporous Materials, ISSN 1387-1811, E-ISSN 1873-3093, Vol. 264, p. 55-59Article in journal (Refereed) Published
Abstract [en]

In this work, we have synthesized four SAPO-34/44 (framework type code: CHA) samples by utilizing different organic structure-directing agent (OSDA) such as cyclohexylamine (CA), n-butylamine (BA), diisopropylamine (DIPA), and dipropylamine (DPA). An approach combining Rietveld refinement and simulated annealing has been successfully applied to determine the location of the individual OSDA and the host (inorganic framework)-guest (OSDA) interaction. The final Rietveld refinements show that 1) one cha cage can be occupied by either two OSDAs (CA and BA) in the up-and-down arrangement or one OSDA (DIPA and DPA) in the longitudinal configuration and 2) the classical hydrogen bond between CA/BA and the inorganic framework in SAPO-44-CA and SAPO-34-BA could be identified. The host-guest interactions among these four samples are also investigated by FT-IR, which are consistent with Rietveld refinement results. The approach employed here could be applicable for the host-guest investigation in other crystalline porous materials.

Place, publisher, year, edition, pages
2018. Vol. 264, p. 55-59
Keywords [en]
Rietveld refinement, Simulated annealing, SAPO-34, Different OSDAs, Host-guest interaction
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-156771DOI: 10.1016/j.micromeso.2018.01.002ISI: 000430900000008OAI: oai:DiVA.org:su-156771DiVA, id: diva2:1213215
Available from: 2018-06-04 Created: 2018-06-04 Last updated: 2018-06-04Bibliographically approved

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Xu, Hongyi
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