title: Selective CO2 adsorption by a triazacyclononane-bridged microporous metal-organic framework.
abstract: Metal-organic frameworks constructed by self-assembly of metal ions and organic linkers have recently been of great interest in the preparation of porous hybrid materials with a wide variety of functions. Despite much research in this area and the large choice of building blocks used to fine-tune pore size and structure, it remains a challenge to synthesise frameworks composed of polyamines to tailor the porosity and adsorption properties for CO(2). Herein, we describe a rigid and microporous three-dimensional metal-organic framework with the formula [Zn(2)(L)(H(2)O)]Cl (L=1,4,7-tris(4-carboxybenzyl)-1,4,7-triazacyclononane) synthesised in a one-pot solvothermal reaction between zinc ions and a flexible cyclic polyaminocarboxylate. We have demonstrated, for the first time, that a porous rigid framework can be obtained by starting from a flexible amine building block. Sorption measurements revealed that the material exhibited a high surface area (135 m(2) g(-1)) and was the best compromise between capacity and selectivity for CO(2) over CO, CH(4), N(2) and O(2); as such it is a promising new selective adsorbent for CO(2) capture.
authors.affiliation: Institut de Chimie Moléculaire de l'Université de Bourgogne, UMR 5260, CNRS, Université de Bourgogne, Dijon, France.
authors.forename: Guillaume
authors.initials: G
authors.lastname: Ortiz
authors.forename: Stéphane
authors.initials: S
authors.lastname: Brandès
authors.forename: Yoann
authors.initials: Y
authors.lastname: Rousselin
authors.forename: Roger
authors.initials: R
authors.lastname: Guilard