Two perfluorinated triazines [2,4,6-tris(p-bromotetrafluorophenoxy)-1,3,5-triazine (2) and 2,4,6-tris(pentafluorophenoxy)-1,3,5-triazine (3)] were synthesized to study their crystal structure and inclusion character. Compd. 3 forms channel inclusions with the solvents p-xylene and p-chlorotoluene, showing a stoichiometry of 2:1 (host:guest). The channels have dimensions of 7.6 ´ 3 .ANG.2. The host-guest interactions, perfluorophenyl-Ph stacking, F×××H- and CH×××p(perfluorophenyl) contacts, were revealed by the crystallog. and solid state NMR spectroscopy studies. The reversibility of the sorption process through the gas phase could be demonstrated by X-ray diffraction. In contrast to the pentafluorinated compd. 3, the tetrafluorinated one (2) showed no inclusions with a no. of typical solvents.
Reichenbaecher, K., Suess, H., Stoeckli Evans, H., Bracco, S., Sozzani, P., Weber, E., et al. (2004). Modification of channel structures by fluorination. NEW JOURNAL OF CHEMISTRY, 28(3), 393-397 [10.1039/b311028a].
Modification of channel structures by fluorination
BRACCO, SILVIA;SOZZANI, PIERO ERNESTO;
2004
Abstract
Two perfluorinated triazines [2,4,6-tris(p-bromotetrafluorophenoxy)-1,3,5-triazine (2) and 2,4,6-tris(pentafluorophenoxy)-1,3,5-triazine (3)] were synthesized to study their crystal structure and inclusion character. Compd. 3 forms channel inclusions with the solvents p-xylene and p-chlorotoluene, showing a stoichiometry of 2:1 (host:guest). The channels have dimensions of 7.6 ´ 3 .ANG.2. The host-guest interactions, perfluorophenyl-Ph stacking, F×××H- and CH×××p(perfluorophenyl) contacts, were revealed by the crystallog. and solid state NMR spectroscopy studies. The reversibility of the sorption process through the gas phase could be demonstrated by X-ray diffraction. In contrast to the pentafluorinated compd. 3, the tetrafluorinated one (2) showed no inclusions with a no. of typical solvents.
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