Some mol. crystals and host-guest supramol. structures contg. short linear mols. and polymers are described. Their motions and dynamic disorder were characterized by solid-state NMR. First, the conformational disorder of elongated mols. and linear polymers in a hexagonal packing is treated, like n-alkanes or polyethylene in perhydrotriphenylene (PHTP) or tris-(o-phenylenedioxy)cyclophosphazene (TPP). The NMR time consts. were used to det. the mol. mobility in the cryst. nanocomposites. The mechanisms of motion within the inclusion compds. were studied by 2H-NMR measurements. Finally, the fast diffusion of Xe gas into the nanoporous cryst. materials was investigated by 129Xe-NMR spectroscopy.
Sozzani, P., Comotti, A., Simonutti, R., Bracco, S., Simonelli, A. (2002). Strength from motion in crystals. The example of supramolecular adducts. In A. Domenicano, I. Hargittai (a cura di), Strength from Weakness: Structural Consequences of Weak Interactions in Molecules, Supermolecules, and Crystals (pp. 319-333). Kluwer Academic Publishers.
Strength from motion in crystals. The example of supramolecular adducts
SOZZANI, PIERO ERNESTO;COMOTTI, ANGIOLINA;SIMONUTTI, ROBERTO;BRACCO, SILVIA;
2002
Abstract
Some mol. crystals and host-guest supramol. structures contg. short linear mols. and polymers are described. Their motions and dynamic disorder were characterized by solid-state NMR. First, the conformational disorder of elongated mols. and linear polymers in a hexagonal packing is treated, like n-alkanes or polyethylene in perhydrotriphenylene (PHTP) or tris-(o-phenylenedioxy)cyclophosphazene (TPP). The NMR time consts. were used to det. the mol. mobility in the cryst. nanocomposites. The mechanisms of motion within the inclusion compds. were studied by 2H-NMR measurements. Finally, the fast diffusion of Xe gas into the nanoporous cryst. materials was investigated by 129Xe-NMR spectroscopy.
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