INOR 703 |
| In an effort to rationally extend the “molecular” (discrete) chemistry of polyoxometalates into supramolecular assemblies, ligand-exchanged A-type Keggin sandwich complexes of the form, [(ML2)3(PW9O34)2]n–, have been prepared and characterized (M = various first-row transition metals; L = bridging, bitopic ligands). The monomeric sandwich-type complexes have been chosen as nanoscale building blocks due to their multiple promising sites for functionalization via metal and ligand exchanges as a result of their relatively open framework around the “sandwiched” metals. With the coordination of the proper ligands (polydentate or possessing hydrogen-bonding sites), rationally designed, polyoxometalate-based, supramolecular assemblies are possible. Structurally similar model complexes (with some M replaced by more inert W) have also been investigated to aid in characterization of the materials. Control of the ligands and the polyoxometalate anions allows for the formation of dimers, trimers, various polygonal assemblies, and other polymers.
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Polyoxometalates and Related Clusters in Chemistry and Nanoscience
7:00 PM-10:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster
Sci-Mix
Division of Inorganic Chemistry |
