Publications by authors named "George Filoti"
Article Synopsis
- The study focuses on the magnetic properties of the "cartwheel" heptanuclear cluster [FeO(OCBu)(Me-dea)(HO)], utilizing Mössbauer spectroscopy and sub-Kelvin magnetization measurements to provide insights into its spin frustration.
- The Fe Mössbauer spectra at temperatures above 150 K revealed a specific ratio of doublets that corresponded to different iron sites within the cluster, confirming a previously proposed spin ground state structure where spins are aligned differently among the central and peripheral sites.
- At sub-Kelvin temperatures, the behavior of the cluster changed, showing spin blocking and single-molecule magnet characteristics, along with a defined anisotropy barrier that allows for quantum tunneling at low temperatures.
Three pyridine 2,3-dicarboxylate complexes have been synthesized and characterized by IR spectroscopy, thermal analysis and single crystal X-ray diffractometry. Their magnetic properties have also been studied by EPR and magnetisation measurements. The decomposition of such complexes in air leads to the generation of mixed metal oxides, as confirmed by powder X-ray diffraction.
View Article and Find Full Text PDFColloids embedded in a silica sol-gel matrix were prepared by using fully alloyed Pd-Au colloids, and pure Pd and Au colloids stabilized with tetraalkylammonium bromide following a modified sol-gel procedure with tetrahydrofuran (THF) as the solvent. Tetraethoxysilicate (TEOS) was used as the precursor for the silica support. The molar composition of the sol was TEOS/THF/H2O/HCl = 1:3.
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