2D supramolecular assemblies of benzene-1,3,5-triyl-tribenzoic acid: Temperature-induced phase transformations and hierarchical organization with macrocyclic molecules

作者：Ruben Mario^*; Payer Dietmar; Landa Aitor; Comisso Alessio; Gattinoni Chiara; Lin Nian; Collin Jean Paul; Sauvage Jean Pierre; De Vita Alessandro; Kern Klaus

来源：Journal of the American Chemical Society, 2006, 128(49): 15644-15651.

DOI：10.1021/ja063601k

Two-dimensional supramolecular honeycomb networks with cavities of an internal diameter of 2.95 nm were formed by the self-assembly of 4,4',4"-benzene-1,3,5-triyl-tribenzoic acid (BTA) on a Ag(111) surface at room temperature. Annealing to higher temperatures resulted in two sequential phase transformations into closer-packed supramolecular arrangements. The phase transformations are associated with stepwise deprotonation of the carboxylic acid groups. The voids of the honeycomb network of BTA have a suitable size for the construction of hierarchical structures with guest molecules. Single molecules of the macrocyclic compound mt-33 were successfully confined inside 2D nanocavities of the honeycomb networks and released when the phase was transformed to the close-packed structure.

• 出版日期2006-12-13