The thermal decomposition of a CrN precursor, hexaammine chromium (II) chloride, in helium and ammonia has been investigated via a combination of thermogravimmetric analysis, differential thermal analysis, Fourier transform infared spectroscopy, and X-ray diffraction. Upon heating [Cr(NH3)6]Cl2 sequentially loses ammonia ligands, ultimately forming CrCl2•NH3 at ~400ºC. In helium, this intermediate undergoes thermolysis to form a rock-salt structured, sub-stoichiometric chromium nitride, whereas in ammonia it ammonolyzes to form CrN.
Revised: February 20, 2008 |
Published: January 1, 2008
Citation
Weil K. 2008.The Synthesis of Transition Metal Nitrides via Thermolysis of Metal-ammine Complexes, Part 1: Chromium Nitride.Journal of Solid State Chemistry 181, no. 1:199-210.PNNL-SA-58326.doi:10.1016/j.jssc.2007.11.008