title: 2D supramolecular assemblies of benzene-1,3,5-triyl-tribenzoic acid: temperature-induced phase transformations and hierarchical organization with macrocyclic molecules.
abstract: 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.
authors.affiliation: Institut für Nanotechnologie, Forschungszentrum Karlsruhe GmbH, PF 3640, D-76021 Karlsruhe, Germany. mario.ruben@int.fzk.de
authors.forename: Mario
authors.initials: M
authors.lastname: Ruben
authors.forename: Dietmar
authors.initials: D
authors.lastname: Payer
authors.forename: Aitor
authors.initials: A
authors.lastname: Landa
authors.forename: Alessio
authors.initials: A
authors.lastname: Comisso
authors.forename: Chiara
authors.initials: C
authors.lastname: Gattinoni
authors.forename: Nian
authors.initials: N
authors.lastname: Lin
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Collin
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Sauvage
authors.forename: Alessandro
authors.initials: A
authors.lastname: De Vita
authors.forename: Klaus
authors.initials: K
authors.lastname: Kern