Current Inorganic Chemistry (v.6, #3)

Meet Our Editorial Board Member by Aivaras Kareiva (141-141).

Meet Our Editorial Board Member by J.-F. Carpentier (142-142).

High-Efficient Hydrotreating Catalysts by Yanfei Wang, Zhihua Zhang, Xuli Zhai (143-148).
Hydrotreating catalysts are commonly used to produce clean fuels through the elimination of heteroatoms compounds. This review examines the existing literature about the effect of the metal active component, supports or additives on the performance of hydrotreating catalysts. It includes: (i) a brief overview of the metal active components and impregnating methods for hydrotreating catalysts. (ii) a summary of the influence of the common support (Al2O3 carrier or mixed oxides supports) nature on the hydrotreating activity. (iii) an introduction of three classes of additives, namely phosphate, boron and chelating agents, to improve the activity and selectivity.

Sol-Gel Synthesis and Characterization of Non-Substituted and Europium- Substituted Layered Double Hydroxides Mg3/Al1-xEux by A. Smalenskaite, S. Sen, A. N. Salak, M G.S. Ferreira, R. Skaudzius, A. Katelnikovas, A. Kareiva (149-154).
The Mg/Al layered double hydroxides (LDHs) were successfully synthesized by novel aqueous sol-gel method. A series of europium-substituted layered double hydroxides (Mg/Al/Eu LDHs) were also synthesized using the same sol-gel processing. The Eu3+ substitution effects were investigated in the Mg3/Al1-xEux system by changing the amount of Eu3+ in the crystal lattice from 0.05 to 10 mol%. The samples obtained were characterized by X-ray diffraction (XRD) analysis, Fourier Transform Infrared spectroscopy (FT-IR), Thermogravimetric (TG) analysis, Scanning Electron Microscopy (SEM) and Fluorescence Spectroscopy (FLS). The results revealed that europium enters into a hydrotalcite structure containing Mg2+ and Al3+ cations in the brucite-like layers.

The objective of the research is an investigation of the most probable structures of lowdimensional hybrid materials constituted by polyvinyl alcohol doped by cadmium halides (viz. CdCl2, CdBr2 and CdI2) through a combined experimental and computational approach.

Methods: The properties of the new materials were extensively investigated by means of UV-VIS, IR and Raman spectroscopy, scanning electron microscopy, X-ray diffraction analysis.

Results: The formation of double-spiral hybrid interpolymeric complexes was foreseen. The features of the computed optical spectra are in accordance with the experimental findings, and an interpretation of the X-ray diffraction patterns was therefore provided.

Among several class of molecule-based metal assembled magnetic materials, quasi 2D materials of general molecular formula A[M(II)M(III)(C2O4)3] - first reported by Hisashi ?kawa and his group of Japan in 1990 had drawn much interest in the field of molecule-based magnetic materials research. Depending upon the metal ion combinations the nature of magnetic interactions observed are ferro-/ferri-/antiferro-/paramagnetism. The counter cation 'A' has been found to play a crucial role in observing phenomenon like spin-glass and rarely occurring magnetic compensation effect. Studies on the low temperature magnetic property of these complexes have always remained challenging. Recently, interesting studies on the synthesis of various 'atom-based' magnetic materials on thermal decomposition of 'molecule-based' A[M(II)M(III)(C2O4)3] have been reported. Thus, A[M(II)M(III)(C2O4)3] type materials starting journey in 1990 remains relevant in the field of materials science research even after three decades. The present article introduces the A[M(II)M(III)(C2O4)3] type materials, reviews the studies on their interesting magnetic property made throughout the three decades and discusses the scopes of using these materials for the synthesis of various homo/heterometallic magnetic materials in the field of materials science research.

Background: The chemistry and properties of thiostannates are relatively well explored. Much less is known about oxido-thiostannates or tin-oxo-sulfides which exhibit different structural, chemical and physical properties compared to thiostannates. Moreover, the presence of transition metal complexes in such compound may add additional functionalities.

Objective: The potential of oxido-thiostannates or tin-oxo-sulfides can only be explored if new compounds are synthesized and characterized.

Method: The title compound was prepared under solvothermal conditions. The crystal structure was solved and refined from single crystal X-ray data. Further characterization was performed with IR spectroscopy, X-ray powder diffraction and elemental analysis. Results: In the crystal structure of {[Ni(1,2- dach)2(ma)]4[Sn10S20O4]} the anion is covalently expanded by [Ni(1,2-dach)2(ma)]2+ complexes via Ni- S bonds to ?3-acting S atoms of the cluster anion. All O atoms of the cluster anion act ?4-bridging and are in a tetrahedral environment of Sn atoms forming an anti-T2 cluster.

Conclusion: The results demonstrate that large anionic units like [Sn10S20O4]8- crystallize at high pH values, while it is assumed that low pH values are necessary for generation of such units.