Improved thermal stability of an organic zeolite by fluorination

The thermal stability of an organic zeolite material, namely 2,4,6-tris(4-bromo-3,5-difluorphenoxy)-1,3,5-triazin (Br-3,5-DFPOT), was improved by fluorination of 2,4,6-tris(4-bromophenoxy)-1,3,5-triazin (BrPOT). The open pore structure (van der Waals diameter of 10.5 Å) of the modified zeolite was o...

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Bibliographic Details
Published in:Journal of Inclusion Phenomena and Macrocyclic Chemistry 2008-06, Vol.61 (1-2), p.127-130
Main Authors: Reichenbächer, Katharina, Couderc, Gaëtan, Neels, Antonia, Krämer, Karl, Weber, Edwin, Hulliger, Jürg
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Crystallography and Scattering Methods
Food Science
Organic Chemistry
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Summary:The thermal stability of an organic zeolite material, namely 2,4,6-tris(4-bromo-3,5-difluorphenoxy)-1,3,5-triazin (Br-3,5-DFPOT), was improved by fluorination of 2,4,6-tris(4-bromophenoxy)-1,3,5-triazin (BrPOT). The open pore structure (van der Waals diameter of 10.5 Å) of the modified zeolite was observed up to 110 °C in comparison to 70 °C for BrPOT. Nitrogen sorption at low temperature showed a type I isotherm and derived pore volumes thereof are in agreement with structural data. It was observed here that Br-3,5-DFPOT crystals preserving the open pore structure could only be obtained below a typical size of about 50 μm. The improved thermal stability of the fluorinated system is attributed to an enhancement of the strength of the Br 3 -synthon.
ISSN:0923-0750
1573-1111
DOI:10.1007/s10847-007-9404-2