High-Pressure Syntheses of Novel Binary Nitrogen Compounds of Main Group Elements The author thanks R. Riedel (TU Darmstadt) and F. F. Lange (University of California, St. Barbara) for their generous support, as well as A. Zerr (TU Darmstadt), S. Buhre (Universität Frankfurt), U. Hornemann (Freiburg), B. Poe (Universiät Bayreuth), and P. McNutt (Rockland Research Inc.) for the useful information concerning costs and applications of the different high-pressure techniques. Furthermore, the author thanks U. Schwarz, G. Auffermann and R. Kniep (MPI für Chemische Physik fester Stoffe, Dresden), W. Schnick (Ludwig-Maximilians-Universität München), A. Simon (MPI für Festkörperforschung, Stuttgart), and P. Kroll (RWTH Aachen) for comments on the manuscript and providing unpublished results. Financial support by the Alexander von Humboldt Stiftung (Feodor Lynen scholarship), the Deutsche Forschungsgemeinschaft (DFG, Bonn), and the Fonds der C

Autor: Kroke, Edwin
Zdroj: Angewandte Chemie. International Edition; January 4, 2002, Vol. 41 Issue: 1 p77-82, 6p
Abstrakt: The application of high-pressure methods in the search for novel materials usually requires additional effort compared to syntheses at ambient pressure. Depending on the desired p/T conditions different methods may be used. Special techniques and experimental apparatus such as shock waves, diamond anvil cells, and multianvil presses, which have been applied mainly by earth scientists and physicists in the past, are increasingly being applied by synthetic chemists and material scientists. A series of fascinating discoveries have been made recently as is demonstrated by three examples of binary nitrogen compounds: 1) Diazenides, compounds with N22− ions, were obtained as single-phase products and structurally characterized for the first time. 2) At 11 GPa and 1800 K a phosphorus(V) nitride was prepared, which contains tetragonal PN5 pyramids as a novel structural motif. 3) Macroscopic amounts of spinel silicon nitride were synthesized by shock-wave techniques, which allows the comprehensive characterization and possibly the implementation of this new hard material.
Databáze: Supplemental Index
Externí odkaz: