Synthesis and characterization of bis (acetylacetonato κ-O, O') [zinc(II)/copper(II)] hybrid organic-inorganic complexes as solid metal organic precursors

We have synthesized novel metal organic hybrid mixed compounds of bis (acetylacetonato kappa-O, O') [zinc(II)/copper(II)]. Taking C10H14O4Zn0.7Cu0.3 (Z(0.7)C(0.3)AA) as an example, the crystals are composed of Z(0.7)C(0.3)AA units and uncoordinated water molecules. Single-crystal X-ray diffraction results show that the complex Z(0.7)C(0.3)AA crystallizes in the monoclinic system, space group P2(1)/n. The unit cell dimensions are a = 10.329(4) angstrom, b = 4.6947(18) angstrom, and c = 11.369(4) angstrom; the angles are alpha = 90 degrees, beta = 91.881(6)degrees, and gamma = 90 degrees, the volume is 551.0(4) angstrom(3), and Z = 2. In this process, the M(II) ions of Zn and Cu mix and occupy the centers of symmetrical structural units, which are coordinated to two ligands. The measured bond lengths and angles of O-M-O vary with the ratio of metal species over the entire series of the complexes synthesized. The chemistry of the as-synthesized compounds has been characterized using infrared spectroscopy, mass spectroscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy analysis, and the morphology of the products has been characterized using scanning electron microscopy. The thermal decomposition of the Z(0.7)C(0.3)AA composites measured by thermogravimetric analysis suggests that these complexes are volatile. The thermal characteristics of these complexes make them attractive precursors for metal organic chemical vapor deposition.