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Metal‐Urea Complex—A Precursor to Metal Nitrides
Author(s) -
Qiu Yu,
Gao Lian
Publication year - 2004
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2004.00352.x
Subject(s) - urea , metal , nitride , inorganic chemistry , chemistry , nucleation , coordination sphere , chloride , materials science , organic chemistry , layer (electronics)
A novel and general route to synthesize various metal nitrides (AlN, CrN, and ζ‐Fe 2 N) from metal–urea complexes is presented. These complexes, especially metal–urea chloride, have proved to be useful precursors to metal nitrides, because urea molecules construct a coordination sphere around the metal atom and form a stable structure, compared with the air‐sensitive halide. Different anions in the second coordination sphere determine the reaction mechanism. The transformation from metal–urea chloride to nitride is thought to follow a nucleation–growth mechanism, while that from metal–urea nitrate is thought to follow a nitridation mechanism. We anticipate that this metal–urea complex will find applications in the fabrication of other, more complex, nitrides.