IMAZ, Inhar; BRAVIC, Georges; SUTTER, Jean-Pascal

doi:10.1039/b503964a

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IMAZ, Inhar
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

BRAVIC, Georges
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

SUTTER, Jean-Pascal
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Dalton Transactions. 2005, vol. n° 16, p. p. 2681-2687

Royal Society of Chemistry

Résumé en anglais

The utilization of tetrahedral pre-formed coordination compounds {M(C2O4)4}4–(M = ZrIV, UIV; C2O42–= oxalate) permitted the efficient construction of rare examples of heteronuclear supramolecular nano-porous architectures. A series of metal–organic coordination frameworks prepared by association of these building units with either Mn2+, Cd2+, or Mg2+ have been structurally characterized and are described. Their 3-D chemical scaffold is based on the primary tetrahedral building unit but their pore sizes and topologies could be varied through the M2+ metal ion involved in the assembling process, and the anionic tetrahedral moiety. These structures display channels with apertures up to 12 Å× 8 Å which are emptied of solvates at mild temperatures without affecting the chemical scaffold, the integrity of which is maintained up to 250–300 °C. A certain degree of flexibility of the coordination polymers upon guest release is suggested by the temperature dependence of the powder X-ray patterns and N2 sorption experiments, but reversible and selective sorption of small molecules has been observed substantiating that these open-frameworks behave like sponges.< Réduire

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Porous materials

Crystal structure

Supramolecular

Tetrahedral {M(C2O4)4}4-

Coordination compounds

Nanomaterials

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Structural and zeolitic features of a series of heterometallic supramolecular porous architectures based on tetrahedral {M(C2O4)4}4- primary building units

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