title: A robust nanoporous supramolecular metal-organic framework based on ionic hydrogen bonds.
abstract: Hydrogen-bond assembly of tripod-like organic cations [H3 -MeTrip](3+) (1,2,3-tri(4'-pyridinium-oxyl)-2-methylpropane) and the hexa-anionic complex [Zr2 (oxalate)7 ](6-) leads to a structurally, thermally, and chemically robust porous 3D supramolecular framework showing channels of 1 nm in width. Permanent porosity has been ascertained by analyzing the material at the single-crystal level during a sorption cycle. The framework crystal structure was found to remain the same for the native compound, its activated phase, and after guest resorption. The channels exhibit affinities for polar organic molecules ranging from simple alcohols to aniline. Halogenated molecules and I2 are also taken up from hexane solutions by this unique supramolecular framework.
authors.affiliation: CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, 31077 Toulouse (France); Université de Toulouse, UPS, INPT, 31077 Toulouse (France). nans.roques@lcc-toulouse.fr.
authors.forename: Nans
authors.initials: N
authors.lastname: Roques
authors.forename: Georges
authors.initials: G
authors.lastname: Mouchaham
authors.forename: Carine
authors.initials: C
authors.lastname: Duhayon
authors.forename: Stéphane
authors.initials: S
authors.lastname: Brandès
authors.forename: Aurélie
authors.initials: A
authors.lastname: Tachon
authors.forename: Guy
authors.initials: G
authors.lastname: Weber
authors.forename: Jean Pierre
authors.initials: JP
authors.lastname: Bellat
authors.forename: Jean-Pascal
authors.initials: JP
authors.lastname: Sutter
keywords: crystal engineering; host-guest systems; hydrogen bonds; microporous materials; supramolecular chemistry