Details

Autor(en) / Beteiligte

• Mazumder, Baishakhi
• Chirico, Pietro
• Hector, Andrew L

Titel

Direct Solvothermal Synthesis of Early Transition Metal Nitrides

Ist Teil von

• Inorganic chemistry, 2008-10, Vol.47 (20), p.9684-9690

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2008

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Solvothermal reactions of TaCl5 with LiNH2 in benzene result in nanocrystalline Ta3N5 at 500 or 550 °C. The ∼25 nm Ta3N5 particles have a band gap of 2.08−2.10 eV. The same reactions in mesitylene resulted in a higher crystallization temperature and large amounts of carbon incorporation due to solvent decomposition. Reactions of Ta(NMe2)5 with LiNH2 under the same conditions resulted in TaN. Rocksalt-type MN phases are obtained for Zr, Hf, or Nb when their chlorides (ZrCl4, HfCl4, or NbCl5) or dialkylamides (M(NEtMe)4, M = Zr, Hf) are reacted with LiNH2 under similar conditions. With the amides, there is some evidence for nitrogen-rich compositions (HfN>1), and carbon is incorporated into the products through pyrolysis of the dialkylamide groups.