Thermal expansivity of ionic clathrate hydrates including gaseous guest molecules

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DOIResolve DOI: http://doi.org/10.1021/jp110737q
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TypeArticle
Journal titleThe Journal of Physical Chemistry B
ISSN1520-6106
Volume115
Issue5
Pages958963; # of pages: 6
SubjectClathrate hydrate; Guest molecules; Host guest interactions; Host-guests; Ionic species; Key factors; Lattice expansion; Nonionic; Tetramethyl ammonium hydroxide; Thermal behaviors; Thermal expansivity; Diffraction; Drug interactions; Hydration; X ray diffraction; Thermal expansion
AbstractAlthough thermal expansion is a key factor in relation to the host-guest interaction of clathrate hydrates, few studies have investigated the thermal behavior of ionic clathrate hydrates. The existence of ionic species in these hydrates creates a unique host-guest interaction compared to that of nonionic clathrate hydrates. It was revealed that X-ray diffraction cannot be used for research of tetramethylammonium hydroxide clathrate hydrates due to damage of the cations by the X-ray, which results in abnormal thermal expansion of the ionic clathrate hydrates. Hence, in the present work, the thermal expansivities of binary sII Me4NOD•16D2O and sI DClO 4•5.5D2O were measured by neutron powder diffraction (NPD) in order to shed light on their thermal behavior. General correlations for the thermal behaviors of given structures were established and lattice expansions depending on the guests were compared between ionic and nonionic clathrate hydrates. The peculiar change in the thermal expansivity of binary DClO4•5.5D2O was also considered in relation to the host-guest configuration. © 2011 American Chemical Society.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NPARC number21271760
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Record identifierfc7c00f1-f514-49df-992f-2c60ae20a4fc
Record created2014-03-24
Record modified2017-03-23
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