Two two‐dimensional supramolecular copper(II) and cobalt(III) complexes derived from a new quinazoline‐type ligand: Syntheses, structures, and spectral, thermal, electrochemical and antimicrobial activity studies

• Published in: Applied organometallic chemistry 2017-11, Vol.31 (11), p.n/a
• Main Authors: Chai, Lan‐Qin, Tang, Li‐Jian, Zhang, Kong‐Yan, Zhang, Jian‐Yu, Zhang, Hong‐Song
• Format: Article
• Language: English
• Subjects: Antiinfectives and antibacterials; antimicrobial activity; Antimicrobial agents; Chemical synthesis; Chemistry; Cobalt; Copper; Copper compounds; Crystal structure; crystal structures; cyclic voltammetry; Electrochemical analysis; Electron paramagnetic resonance; EPR; Infrared analysis; Ligands; metal complexes; Molecular orbitals; NMR; Nuclear magnetic resonance; Reaction mechanisms; Single crystals; Spectra; spectroscopic studies
• ISSN: 0268-2605; 1099-0739
• DOI: 10.1002/aoc.3786

Two two‐dimensional supramolecular copper(II) and cobalt(III) complexes, Cu(L1)2 (1; HL1 = 2‐hydroxy‐3‐methoxybenzaldehyde oxime) and [Co(L2)2]2⋅2CH3COOCH2CH3 (2; HL2 = 1‐(2‐{[(E)‐3‐methoxy‐2‐hydroxybenzylidene]amino}phenyl)ethanone oxime), have been synthesized via complexation of Cu(II) nitrate trihydrate and Co(II) acetate tetrahydrate with HL. A plausible reaction mechanism for the formation of HL1 is proposed. HL was synthesized and characterized using infrared, 1H NMR and 13C NMR spectra, as well as elemental analysis. Complexes 1 and 2 were investigated using single‐crystal X‐ray diffraction and have a 2:1 ligand‐to‐metal ratio. Different geometric features of both complexes are observed. In their crystal structures, 1 and 2 form infinite two‐dimensional structures and 2 forms a three‐dimensional supramolecular framework. Electron paramagnetic resonance spectra of 1 and 2 were also investigated. Moreover, thermal and electrochemical properties and antimicrobial activity of 2 were also studied. In addition, the calculated HOMO and LUMO energies show the character of complex 1. Two‐dimensional supramolecular copper(II) and cobalt(III) complexes were synthesized from a quinazoline‐type ligand. EPR spectra of the complexes were investigated. Thermal and electrochemical properties and antimicrobial activity of the Co(III) complex were also studied. The calculated HOMO and LUMO energies show the character of the Cu(II) complex.