Further studies of fluoride ion entrapment in octasilsesquioxane cages; X-ray crystal structure studies and factors that affect their formation

Taylor, Peter G.; Bassindale, Alan R.; El Aziz, Youssef; Pourny, Manuel; Hursthouse, Michael B. and Coles, Simon J. (2012). Further studies of fluoride ion entrapment in octasilsesquioxane cages; X-ray crystal structure studies and factors that affect their formation. Dalton Transactions, 41(7), pp. 2048–2059.

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DOI (Digital Object Identifier) Link:	http://dx.doi.org/doi:10.1039/C1DT11340B
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Abstract

A range of fluoride-encapsulated octasilsesquioxane cage compounds have been prepared using the TBAF route. Our studies suggest that whilst it is relatively straightforward to prepare fluoride-encapsulated octasilsesquioxane cage compounds with adjacent sp² carbons, leading to a range of aryl and vinyl substituted compounds, the corresponding sp³ carbon derivatives are more capricious, requiring an electron withdrawing group that can stabilize the cage whilst not acting as a leaving group. Analysis by X-ray crystallography and solution ¹⁹F/²⁹Si NMR spectroscopy of R8T8@F⁻ reveal very similar environments for the encapsulated fluoride octasilsesquioxane cages. Migration of a fluoride ion from inside the cage to outside the cage without breaking the T8 framework and the possibility of encapsulating other anions within silsesquioxane cages have been also investigated.

Item Type:	Journal Article
Copyright Holders:	2012 Royal Society of Chemistry
ISSN:	1477-9226
Academic Unit/Department:	Science > Life, Health and Chemical Sciences Other Departments > Other Departments Science > Physical Sciences
Item ID:	32238
Depositing User:	Peter Taylor
Date Deposited:	01 Feb 2012 17:42
Last Modified:	22 Nov 2012 17:12
URI:	http://oro.open.ac.uk/id/eprint/32238

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