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C. Maurer, U. Schubert:
"New Pre-Organized Metal Alkoxide";
Talk: 7. Workshop Anorganische Chemie in Österreich (7. WACÖ), Universität Innsbruck; 2012-04-02 - 2012-04-03; in: "7. Workshop Anorganische Chemie in Österreich", (2012), 1 (V39).

Organically modified metal alkoxides are well known as precursors for sol-gel materials, since Substitution of part of the alkoxo groups opens the chance of lowering the reactivity and better controll of sol-gel processing. To this end, different types of ligands, e.g. ß-diketones, ß-ketoesters, amines and oximes can be used. Sol-gel processing of the metal alkoxide complexes results in unstructured materials. Finding stable pre-organized precursors opens the possibility to prepare new structured metal oxide-based materials.
New pre-organized metal alkoxide precursors will be presented in this contribution. We were able to show that reaction of bis-(ß-diketones) and bis-(ß-ketoesters) with titanium and zirconium alkoxide resulted in dimeric, cyclic complexes instead of oligomeric or polymeric arrangements. With those ligands no structural motives could be observed in the resulted metal oxide. So we therefore focus on tri- or multidentate ligands (carboxylic acids and oximes) were focused to achieve some structural pre-organization.
Due to the use of ligands with weaker coordination sites a better spatial arrangement should be possible. Especially the use of carboxylic acids opens the possibility of MOF-like structures. NMR, IR and SAXS studies of these precursors will be discussed.