Cover Picture: Fe-Doped ZnO Nanoparticles: The Oxidation Number and Local Charge on Iron, Studied by 57Fe Mößbauer Spectroscopy and DFT Calculations (Chem. Eur. J. 10/2013)

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Abstract

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If produced by flame spray pyrolysis, more than 10% of Fe dopants can be introduced into the wurtzite lattice of ZnO nanoparticles. A combined experimental and theoretical Mößbauer spectroscopy study unambiguously assigns the Fe dopants as substitutional FeII ions, although the charge-dependent properties of the Fe dopants in ZnO are similar to those of Fe3+ ions. For more information see the Communication by T. Heine et al. on page 3287 ff.

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Fragrances

The use of metal triflates and triflimides allows the catalysis of a variety of efficient coupling reactions, in particular involving the functionalisation of non-activated and highly substituted olefins. Application of this chemistry to the field of olfaction remains an open field, in which the search of new odourant molecules of high olfactory intensity is a continuous challenge. For more details see the Concept article by E. Duñach and G. Lemière on page 3270 ff.

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Buckybowls

Dry preferred–like a martini: The synthesis of the first fluorinated buckybowl, hexafluorosumanene is presented by H. Sakurai et al. in their Communication on page 3282. The final step needs to be carried out in a dry polypropylene tube to give hexafluorosumanene in high yield. If the reaction is carried out in a glass vessel, the liberated water generates the whole family of oxofluoro-sumanenes. A simple columnar structure was found for hexafluorosumanene in the solid state, as elucidated by single-crystal X-ray crystallography.

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Helical Structures

An octadentate cyclen[BOND]Ca2+ complex acts as a chirality probe for two kinds of external chiral anions. The chirality transfer could be monitored both at the pyridine blades and at the terminal coumarin group in the octadentate cyclen[BOND]Ca2+ complex. Circular dichroism, reflecting the helicity of the complex, was induced by various chiral Boc-amino acid anions through anion coordination and also by the Δ-TRISPHAT anion through an ion-pairing interaction. For more information, see the Full Paper by H. Ito, S. Shinoda, and H. Tsukube on page 3330 ff.

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Ancillary