Ferrocene-containing polyphenylenes as precursors of magnetic nanomaterials
| Autor: | Ivan S. Bushmarinov, Yu. V. Korshak, Mikhail I. Buzin, V. A. Shanditsev, Alexander A. Korlyukov, R. A. Dvorikova, Lev N. Nikitin, A. L. Rusanov, Alexey R. Khokhlov, Sergey S. Abramchuk |
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| Rok vydání: | 2010 |
| Předmět: |
chemistry.chemical_classification
Materials science Supercritical carbon dioxide General Engineering Polymer Condensed Matter Physics Triethyl orthoformate Nanomaterials Magnetization chemistry.chemical_compound chemistry Chemical engineering Ferrocene Transmission electron microscopy Organic chemistry Magnetic nanoparticles General Materials Science |
| Zdroj: | Nanotechnologies in Russia. 5:647-655 |
| ISSN: | 1995-0799 1995-0780 |
| Popis: | New magnetic nanomaterials based on ferrocene-containing polyphenylenes were obtained. The reaction of polycyclocondensation of 1,1′-diacetylferrocene in the presence of triethyl orthoformate and p-toluenesulfonic acid within 20–200°C under common conditions and in supercritical carbon dioxide (scCO2) was carried out for the first time to give highly branched ferrocene-containing polyphenylenes as precursors of magnetic nanomaterials. The heating of the polyphenylenes in the range of 200–750°C resulted in the crosslinking of macromolecules and the formation of crystalline iron-containing magnetic nanoparticles in a carbonized polymer matrix. The magnetization of these nanomaterials was found to reach 32 G cm3/g in a magnetic field of 2.5 kOe. Transmission electron microscopy (TEM) showed the average size of magnetic nanoparticles to be from 6 to 22 nm. X-ray diffraction studies of the materials revealed a complex composition of the iron-containing magnetic nanoparticles (Fe, Fe3C, Fe2O3, Fe3O4, etc.). |
| Databáze: | OpenAIRE |
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