title: Supramolecular Archimedean cages assembled with 72 hydrogen bonds.
abstract: Self-assembly of multiple components into well-defined and predictable structures remains one of the foremost challenges in chemistry. Here, we report on the rational design of a supramolecular cage assembled from 20 ions of three distinct species through 72 hydrogen bonds. The cage is constructed from two kinds of hexagonal molecular tiles, a tris(guanidinium)nitrate cluster and a hexa(4-sulfonatophenyl)benzene, joined at their edges through complementary and metrically matched N-H···O-S hydrogen bonds to form a truncated octahedron, one of the Archimedean polyhedra. The truncated octahedron, with an interior volume of 2200 cubic angstroms, serves as the composite building unit of a body-centered cubic zeolite-like framework, which exhibits an ability to encapsulate a wide range of differently charged species, including organic molecules, transition metal complexes, and "ship-in-a-bottle" nanoclusters not observed otherwise.
authors.affiliation: Department of Chemistry and the Molecular Design Institute, New York University, 100 Washington Square East, New York, NY 10003-6688, USA.
authors.forename: Yuzhou
authors.initials: Y
authors.lastname: Liu
authors.forename: Chunhua
authors.initials: C
authors.lastname: Hu
authors.forename: Angiolina
authors.initials: A
authors.lastname: Comotti
authors.forename: Michael D
authors.initials: MD
authors.lastname: Ward