The thesis presented here is focused on the synthesis of iron-bismuth alkoxides and siloxides as precursors for multiferroic BiFeO<sub>3</sub> systems. Spectrum of novel cyclopentadienyl substituted iron-bismuth complexes of the general type [{Cp<sup>y</sup>(CO)<sub>2</sub>Fe}BiX<sub>2</sub>], as potential precursors for cyclopentadienyl iron-bismuth alkoxides or siloxides [{Cp<sup>y</sup>(CO)<sub>2</sub>Fe}Bi(OR)<sub>2</sub>] (R-O<sup>t</sup>Bu, OSiMe<sub>2</sub><sup>t</sup>Bu), were obtained and characterised. The use of wide range of cyclopentadienyl rings in the iron carbonyl compounds allowed for a comprehensive analysis of its influence on structure, reactivity as well as solubility of the studied complexes, which are crucial features of potential precursors. The results fill the gap in the chemistry of cyclopentadienyl iron-bismuth complexes.
In this work a new method of preparation of novel alkoxides or siloxides iron-bismuth complexes has been developed. In the reaction of Fe<sub>2</sub>(CO)<sub>9</sub> with Bi(O<sup>t</sup>Bu)<sub>3</sub> or Bi(OSiMe<sub>2</sub><sup>t</sup>Bu)<sub>3</sub> molecular precursors for preparation of heterobimetallic oxides were obtained. Moreover, characterised compounds allowed to extend the knowledge about existence of iron-bismuth clusters and open new ways for the further investigations on the carbonyl iron-bismuth siloxides and alkoxides. The resulting compounds are good single source precursors for the BiFeO<sub>3</sub> materials. The presented synthetic route can be generalized and other heterobimetallic compounds can be obtained. This work should also be helpful in the designing new precursors for synthesis of metal oxides.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:19322 |
| Date | 30 March 2010 |
| Creators | Wójcik, Katarzyna |
| Contributors | Mehring, Michael, Spange, Stefan, Technische Universität Chemnitz |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | doc-type:doctoralThesis, info:eu-repo/semantics/doctoralThesis, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
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