Trinuclear metal carboxylate clusters are explored as templates for generating one-, two-, and three-dimensional octupolar materials. Octupoles can be expressed in cubic, tetrahedral, and trigonal symmetries; in this work a strategy is developed for the direct synthesis of 3D octupolar materials possessing trigonal symmetry. These materials are based on metal organic frameworks in which oxo-bridged trinuclear metal clusters [M3O(OOCR)6L3]n+ act as the secondary building units. These units are trigonal and octupolar; their topology allows three in-plane and six out-of plane connectivities. This topology is fully exploited in the current work to generate discrete clusters and extended acentric framework structures. Current work explores manganese clusters, which can be prepared under aerobic conditions. Different combination of aza-ligands and carboxylic acids are examined to synthesize clusters and framework materials for which nonlinearity can be characterized at the molecular and bulk level. Crystallographic and chemical characterization of these materials is performed by single crystal and powder X-ray diffraction methods, and IR and NMR spectroscopy.
Back to Inorganic Poster Session - Fri Eve
Back to The 33rd Northeast Regional Meeting (July 14-17, 2005)