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Inclusion complexes between cyclic siloxanes and cyclodextrins: synthesis and characterization

Abbato, Vincenzo; Bassindale, Alan R.; Brandstadt, Kurt F. and Taylor, Peter G. (2012). Inclusion complexes between cyclic siloxanes and cyclodextrins: synthesis and characterization. Journal of Inclusion Phenomena and Macrocyclic Chemistry, 74 pp. 223–230.

DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1007/s10847-011-0103-7
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Abstract

Molecular inclusion complexes between cyclodextrins and cyclic siloxanes were prepared and characterized via a combination of liquid and solid state NMR, FT-IR, TGA, powder X-ray diffraction, SEM–EDS and elemental analyses. The crystalline complexes adopted the channel-type conformation. Depending from the size of both the cyclic sugar cavity and the silicon guest, various yields (between 0 and 41%) and host–guest molar ratios (between 1:1 and 4:1) were obtained. α-cyclodextrin (α-CD) and β-cyclodextrin (β-CD) were observed to form crystalline inclusion complexes only with D3 (cyclic dimethyltrisiloxane) due to steric effects, whereas the larger γ-cyclodextrin (γ-CD) formed inclusion complexes both with D3, D4 (cyclic dimethyltetrasiloxane) and D5 (cyclic dimethylpentasiloxane). This study is believed to be the first step towards the selective removal of cyclic siloxanes impurities from commercial PDMS preparations.

Item Type: Journal Article
Copyright Holders: 2012 Springer Science+Business Media B.V.
ISSN: 1573-1111
Keywords: cyclodextrin; cyclosiloxane; inclusion complex; channel-type
Academic Unit/Department: Other Departments > Other Departments
Science > Life, Health and Chemical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
eSTEeM
Biomedical Research Network (BRN)
Item ID: 32431
Depositing User: Peter Taylor
Date Deposited: 08 Feb 2012 13:31
Last Modified: 10 Mar 2014 09:27
URI: http://oro.open.ac.uk/id/eprint/32431
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