| Autor: |
Willemin, Stephanie, Arrachart, Guillem, Lecren, Lollita, Larionova, Joulia, Coradin, Thibaud, Clérac, Rodolphe, Mallah, Talal, Guérin, Christian, Sanchez, Clément |
| Zdroj: |
New Journal of Chemistry; 2003, Vol. 27 Issue: 10 p1533-1539, 7p |
| Abstrakt: |
Molecular clusters Mn12O12RCOO16H2On R CH3, C6H5n 4 and C2H5n 3 and Mn4CH3COO2pdmH6 pdmH 2,6-bis hydroxymethylpyridine presenting Single Molecule Magnetic SMM behaviour were inserted into hexagonal mesoporous silica with pore size in the 25–100 Å range. An optimum host pore size exists which maximizes the amount of embedded cluster. The composites were studied by X-ray diffraction, infrared spectroscopy, magnetic measurements, nitrogen sorption, thermogravimetric analysis and transmission electronic microscopy. All these methods reveal the presence of intact guest clusters inside the silica pores. Moreover, if the magnetic properties of the clusters appear globally unmodified by the insertion process, the absence of a magnetic isomer form of Mn12O12CH3COO16H2O4 within silica porosity suggests an influence of the confinement on the cluster structure. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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