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Improved thermal stability of an organic zeolite by fluorination

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Abstract

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 Br3-synthon.

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Acknowledgement

This work was supported by the Swiss SNF 200021-113358/1.

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Authors and Affiliations

  1. Departement of Chemistry and Biochemistry, University of Berne, Freiestrasse 3, 3012, Berne, Switzerland

    Katharina Reichenbächer, Gaëtan Couderc, Karl Krämer & Jürg Hulliger

  2. Institute of Microtechnology, University of Neuchâtel, Jacquet Droz 1, 2002, Neuchatel, Switzerland

    Antonia Neels

  3. Institute of Organic Chemistry, TU Bergakademie Freiberg, Leipziger Str. 29, 09596, Freiberg/Sachsen, Germany

    Edwin Weber

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  1. Katharina Reichenbächer
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  2. Gaëtan Couderc
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  3. Antonia Neels
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  4. Karl Krämer
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  5. Edwin Weber
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  6. Jürg Hulliger
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Correspondence to Jürg Hulliger.

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Reichenbächer, K., Couderc, G., Neels, A. et al. Improved thermal stability of an organic zeolite by fluorination. J Incl Phenom Macrocycl Chem 61, 127–130 (2008). https://doi.org/10.1007/s10847-007-9404-2

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  • DOI: https://doi.org/10.1007/s10847-007-9404-2

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