Partially fluorinated β-diketonate complexes M(tfac)(TMEDA) (M = Fe 1, Ni 2, Cu 3, Zn 4; tfac = 1,1,1-trifluoro-2,4-pentanedionate; TMEDA = ,,','-tetramethylethylenediamine) were synthesized and structurally (sc-XRD) and thermochemically (TGA) characterised. A new polymorph of Fe(tfac)(TMEDA) was found. The structural and physicochemical properties of 1-4 were compared with related M(acac)(TMEDA) and M(hfac)(TMEDA) (acac = 2,4-pentanedionate, hfac = 1,1,1,5,5,5-hexafluoro-2,4-pentanedionate) β-diketonate complexes to evaluate the effect of the degree of fluorination. A positive effect on the thermal behaviour of the metal acetylacetonates was observed, but no discernible trends. Application of complexes 1-4 as precursors in a MOCVD process yielded either metal (Ni, Cu) or metal oxide thin films (FeO, ZnO), which were further oxidized to NiO, CuO and α-FeO films by calcination in air at 500 °C.
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| http://dx.doi.org/10.1039/d2ra01338j | DOI Listing |
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