An azo-azomethine ligand and its copper(II) complex: Synthesis, X-ray crystal structure, spectral, thermal, electrochemical and photoluminescence properties

作者：Eren Tugba; Kose Muhammet; Kurtoglu Nurcan; Ceyhan Gokhan; McKee Vickie; Kurtoglu Mukerrem^*

来源：Inorganica Chimica Acta, 2015, 430: 268-279.

DOI：10.1016/j.ica.2015.03.010

• Azo-azomethine
• Copper complex
• Crystal structure
• Spectroscopic studies
• Electrochemistry
• Photoluminescence

In this study, a new azo-azomethine ligand, 4-[(E)-phenyldiazenyl]-2-[(E)-{[4-(propan-2-yl)phenyl]imino}methyl]phenol (HL) and its Cu(II) complex, [CuL2] were synthesized and characterized by the analytical and spectroscopic methods such as elemental analyses, FT-IR, H-1, C-13 NMR and mass spectra. Molecular structures of the ligand and its Cu(II) complex were determined by single crystal X-ray diffraction studies. In the structure of the ligand, there is an intramolecular phenol-imine hydrogen bond (O1 center dot center dot center dot N1) with a distance of 2.580(3) angstrom. There are also intermolecular hydrogen bond type interactions CH center dot center dot center dot O and CH center dot center dot center dot N=N stabilizing the structure. The crystal structure of the Cu(II) was solved in the triclinic space group P (1) over bar. In the structure of the complex, the Cu(II) ion is four coordinate bonded to two phenolate oxygens and two imine nitrogens of two ligand molecules in an approximate square-planar geometry. The Cu-O bonds are in trans configuration. Thermogravimetric data revealed that the Cu(II) complex is thermally more stable than the azo-azomethine compound (HL). Upon coordination with Cu(II) ion, both excitation and emission intensities of the ligand shifted to lower values.

• 出版日期2015-5-1