Asymmetric beta-ketoiminate ligand compound, preparation method thereof and organometal percursor comprising the same

摘要

Disclosed are an asymmetric beta -ketoiminate ligand compound represented by the following chemical formula, a preparation method thereof, and an organometallic precursor comprising the ligand. In addition to being highly soluble in organic solvents, the organometallic precursor exhibits enhanced chemical stability and excellent thermal properties without leaving residues after evaporation. Moreover, the ligand compound allows any metal precursors derived therefrom to follow similar evaporation and decomposition behaviors, which is required especially for the deposition of multi-component metal oxide thin films comprising titanium: <CHEM> wherein, R1 is a linear or branched alkyl group containing 1 to 8 carbon atoms; R2 is a linear or branched alkyl group containing 2 to 9 carbon atoms, with the proviso that R2 contains more carbon atoms than R1; R' is a linear or branched alkylene group containing 1 to 8 carbon atoms or a hydrocarbon containing 1 to 3 ethylene ether or propylene ether moieties, represented by -(CH2)nO- (n=2 or 3); R3 is a hydrogen atom or a linear or branched alkyl group containing 1 to 9 carbon atoms; and X is an oxygen atom or a sulfur atom.