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Hydration studies of a simple molecular solid

Okoth, M. O. and Vrcelj, R. M. and Sheen, D. B. and Sherwood, J. N. (2012) Hydration studies of a simple molecular solid. CrystEngComm, 14 (5). pp. 1602-1612. ISSN 1466-8033

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Abstract

This paper presents novel information on the thermal dehydration and rehydration of the molecular solid, Oxalic Acid Dihydrate. Although the procedure of the overall decomposition process is well-defined, the structural basis and mechanism of the dehydration process has been poorly studied. We show that the dehydration occurs in a planar manner, with a resultant semi-topotactic relationship between hydrated and dehydrated structures, reflected in the molecular packing. During rehydration, the reconstruction of the phase can be seen to occur at a 3-dimensional phase boundary reaction front, i.e. a recrystallisation of the dihydrate on the surface of the reactant product, with the topotactic relationship leading to texturing and possibly epitaxial relationships between partially dehydrated and rehydrated structures. The proposed mechanism is shown to be consistent with the measured kinetics of the process.

Item type: Article
ID code: 40301
Keywords: decomposition, crystalline solids, oxalic-acid dihydrate, Physical and theoretical chemistry, Materials Science(all), Chemistry(all), Condensed Matter Physics
Subjects: Science > Chemistry > Physical and theoretical chemistry
Department: Faculty of Science > Pure and Applied Chemistry
Related URLs:
Depositing user: Pure Administrator
Date Deposited: 02 Jul 2012 14:31
Last modified: 27 Mar 2014 10:14
URI: http://strathprints.strath.ac.uk/id/eprint/40301

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