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The theoretical approach to the understanding of the NMR parameters in paramagnetic exchange coupled dimers is discussed and simplified formulas are provided. The effect of magnetic coupling on electron relaxation times in magnetic coupled heterodimetallic systems is also discussed. The 1H NMR spectra of two oxidized and reduced Fe2S2-ferredoxins are interpreted and structural information is obtained...
Iron-sulfur polymetallic centers pose interesting questions on the oxidation state of each metal ion, on the possibility of electron delocalization over the metal ions versus the possibility of existence of equilibria among different localized-valence states, and on the factors determining if, and to what extent, electron delocalization is present. By interpreting the hyperfine coupling of unpaired...
Cometary dust environment modelling is required to make predictions for the European Space Agency’s Rosetta mission. Following results from pre-planetary dust aggregation experiments both on Earth and in space (CODAG), we have developed a code to generate and study the morphological properties of dust chains characterized by a fractal mass dimension Df∼1.3. We are now analysing the scattering...
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