A Copper(II) complex of a new hydrazone: A solid-state single source precursor for the preparation of both Cu and CuO nanoparticles

• Published in: Journal of molecular structure 2019-02, Vol.1177, p.469-475
• Main Authors: Selvam, Pitchai, Sathiyakumar, Subramani, Srinivasan, Krishnan, Premkumar, Thathan
• Format: Article
• Language: English
• Subjects: Copper complex; Crystal structure; CuO; Hydrazone; Nanoparticles
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2018.09.082

A novel hydrazone, ethyl 4-(pyridine-4yl-methylene) hydrazinecarboxylate (C9H11N3O2; 4-py), and Cu(II) complex [Cu(4-py)2(CH3COO)2(H2O)] (1) were synthesized and characterized via elemental analysis, FT-IR, 1H NMR and 13C NMR spectral techniques. The structure of 1 was determined through single crystal X-ray diffraction. The structure consists of monomers in which copper is penta-coordinated through a distorted square pyramidal geometry. The pyridine nitrogen atoms of two monodentate 4-py ligands and oxygen atoms from two monodentate acetate anions form the basal plane. The apical site is occupied by a water molecule. Nano sized copper metal (∼5 nm) and copper oxide (∼10 nm) were separately prepared via thermal decomposition of the as-prepared copper complex by varying the atmospheric conditions under which the complex was calcined at 400 °C for 1 h. Powder x-ray diffraction (PXRD) patterns confirmed that the prepared Cu and CuO nanoparticles were of high purity and crystallinity. Hence, this complex could be used as a single solid-state precursor to prepare both Cu and CuO nanoparticles via low temperature decomposition under different atmospheric conditions. [Display omitted] •We prepared a [Cu(4-py)2(CH3COO)2(H2O)] complex from a new hydrazine.•Cu is penta-coordinated with a distorted square pyramidal geometry.•Nano Cu and CuO can be synthesized by using this complex.