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Volatile Heterobimetallic Complexes from Pd II and Cu II β‐Diketonates: Structure, Magnetic Anisotropy, and Thermal Properties Related to the Chemical Vapor Deposition of CuPd Thin Films
Author(s) -
Krisyuk Vladislav V.,
Baidina Iraida A.,
Turgambaeva Asiya E.,
Nadolinny Vladimir A.,
Kozlova Svetlana G.,
Korolkov Ilya V.,
Duguet Thomas,
Vahlas Constantin,
Igumenov Igor K.
Publication year - 2015
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201500050
Subject(s) - bimetallic strip , thermal decomposition , homoleptic , chemical vapor deposition , chemistry , molecule , magnetic anisotropy , atmospheric temperature range , thin film , crystallography , single crystal , copper , ligand (biochemistry) , thermogravimetric analysis , metal , analytical chemistry (journal) , materials science , organic chemistry , magnetization , nanotechnology , biochemistry , physics , receptor , quantum mechanics , meteorology , magnetic field
Abstract A novel approach for preparing volatile heterometallic complexes for use as precursors for the chemical vapor deposition of various materials is reported. New CuPd complexes based on β‐diketonate units were prepared, and their structures and compositions were determined. [PdL 2 *CuL 2 ] ( 1 ) and [PdL 2 *Cu(tmhd) 2 ] ( 2 ) (L=2‐methoxy‐2,6,6‐trimethylheptane‐3,5‐dionate; tmhd=2,2,6,6‐ tetramethylheptane‐3,5‐dionate) are 1D coordination polymers with alternating metal complexes, which are connected through weak interactions between the Cu atoms and the OCH 3 groups from the ligand of the Pd complexes. The volatility and thermal stability were studied using thermogravimetric and differential thermal analyses and mass spectrometry. Compound 1 vaporizes without decomposition into monometallic complexes. It exhibits magnetic anisotropy, which was revealed from the angular variations in the EPR spectrum of a single crystal. The vapor thermolysis process for 1 was investigated using mass spectrometry, allowing the process to be framed within the temperature range of 200–350 °C. The experimental data, supported by QTAIM calculations of the allowed intermolecular interactions, suggest that 1 likely exists in the gas phase as bimetallic molecules. Compound 1 proved to be suitable as a single‐source precursor for the efficient preparation of CuPd alloy films with tunable Cu/Pd ratio. A possible mechanism for the film growth is proposed based on the reported data.