[en] By analogy with hydrogen-bonded molecular capsules, self-assembled nanotubes are of interest because they can temporarily isolate guest molecules from the solution. We show here that the stability of a particular bis-urea based dynamic self-assembled nanotube is related to the possibility for solvent molecules to fit inside the tubular cavity. The diameter of the cavity can be finely tuned by introducing a modified monomer in controlled amount.
Disciplines :
Chimie Physique
Auteur, co-auteur :
Isare, B.
Linares, M.
Lazzaroni, Roberto ; Université de Mons > Faculté des Sciences > Service de Chimie des matériaux nouveaux
Bouteiller, L.
Langue du document :
Anglais
Titre :
Engineering the Cavity of Self-Assembled Dynamic Nanotubes
Date de publication/diffusion :
19 mars 2009
Titre du périodique :
Journal of Physical Chemistry B
ISSN :
1520-6106
Maison d'édition :
American Chemical Society, Etats-Unis - District de Columbia
Volume/Tome :
113
Fascicule/Saison :
11
Pagination :
3360-3364
Peer reviewed :
Peer reviewed vérifié par ORBi
Unité de recherche :
S817 - Chimie des matériaux nouveaux
Institut de recherche :
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
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Bis-urea 2 did not form nanotubes at room temperature in any solvent tested: in chloroform, 2 forms the same filaments as 1 (Table 1); in dodecane, 2 is not soluble.
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Up to now, our efforts to find a direct spectroscopic signature of the encapsulated solvent have been unsuccessful, because of the very broad NMR signal for bis-ureas 1 and 2 in nonpolar solvents.
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