Sol-Gel Processing of Pre-organized Metal Alkoxide Precursors

01.04.2011 - 31.03.2016
Forschungsförderungsprojekt
Mixtures of (semi-)metal alkoxide precursors are commonly used for the preparation of mixed-oxides by sol-gel processing. This also includes organically modified precursors for the preparation of inorganic-organic hybrid materials. In the case of alkoxysilanes, the organic groups are directly bonded to the silicon atom, while bi- or tridentate ligands must be used to tether organic groups to metal alkoxide moieties. In the planned project, a first step towards a new generation of sol-gel inorganic-organic hybrid materials with new and interesting properties is planned by using new pre-organized sol-gel precursors containing two or more metal alkoxide moieties. To this end, the metal alkoxide moieties will be connected with each other by hydrolytically stable organic linkers. Molecular building blocks with different structural and chemical characteristics will thus be arranged in specific sequences. The pre-organized structures should be retained during sol-gel processing. The simplest case is precursors with two metal alkoxide moieties of the same kind connected by an organic linker. Network structures are formed upon sol-gel processing in which the organic groups become part of the network. Such network structures are known for alkoxysilane precursors, but corresponding metal alkoxide have not yet been synthesized. An even greater challenge is the synthesis of bimetallic precursors, where two different metal alkoxide moieties are connected. Sol-gel processing of the latter would allow to prepare bimetallic gels in which the two metals are deliberately positioned this respect to each other. Finally, new network structures will be obtained when chain- or sheet-like modules are subjected to sol-gel processing. The one- or two-dimensional pre-organization of metal alkoxide moieties will again be achieved by means of suitable bi- or trifunctional organic ligands.

Personen

Projektleiter_in

Institut

Grant funds

  • FWF - Österr. Wissenschaftsfonds (National) Austrian Science Fund (FWF)

Forschungsschwerpunkte

  • Non-metallic Materials: 80%
  • Structure-Property Relationsship: 10%
  • Materials Characterization: 10%

Schlagwörter

DeutschEnglisch
Anorganisch-organische HybridmaterialienInorganic-organic hybrid materials
Molekulare BaugruppenMolecular building blocks
Sol-Gel Prozesssol-gel processing

Publikationen