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Synthesis of Heterobimetallic Zn/Co Carbamates: Single‐Source Precursors of Nanosized Magnetic Oxides Under Mild Conditions
Author(s) -
Domide Dan,
Walter Olaf,
Behrens Silke,
Kaifer Elisabeth,
Himmel HansJörg
Publication year - 2011
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201001095
Subject(s) - chemistry , isostructural , thermal decomposition , metal , alkyl , decomposition , nanoparticle , zinc , phase (matter) , inorganic chemistry , polymer chemistry , medicinal chemistry , crystallography , chemical engineering , organic chemistry , crystal structure , engineering
Tetrameric Zn alkyl carbamates [ZnR(O 2 CNR′ 2 )] 4 (R = Me or Et, R′ = i Pr) have been synthesized from alkylzinc amides and CO 2 . The reaction of these carbamates with specially designed Co II complexes afforded new heterobimetallic (Zn/Co) carbamate complexes. The thermal decomposition of these single‐source precursors under mild conditions (200–300 °C) led to magnetic mixed‐metal oxide nanoparticles. Two phases were identified that are isostructural with ZnO (wurtzite phase) and CoO (cubic rock salt structure), but both contain Zn and Co in varying molar ratios. The particles with the ZnO‐type structure have a mean average size of 7.7 nm, whereas the particles with the CoO‐type structure are much larger (ca. 48 nm).