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

Dalton Trans

Institut de Chimie de la Matière Condensée de Bordeaux-CNRS, Université Bordeaux 1, 87 Avenue du Dr. Schweitzer, F-33608, Pessac, France.

Published: August 2005

AI Article Synopsis

Article Abstract

The utilization of tetrahedral pre-formed coordination compounds {M(C2O4)4}4- (M = Zr(IV), U(IV); C2O4(2-) = 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 Angstrom x 8 Angstrom which are emptied of solvates at mild temperatures without affecting the chemical scaffold, the integrity of which is maintained up to 250-300 degrees 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.

Download full-text PDF

Source
http://dx.doi.org/10.1039/b503964aDOI Listing

Publication Analysis

Top Keywords

building units
8
chemical scaffold
8
structural zeolitic
4
zeolitic features
4
features series
4
series heterometallic
4
heterometallic supramolecular
4
supramolecular porous
4
porous architectures
4
architectures based
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!