A new nano‐sized mononuclear Cu (II) complex with N,N‐donor Schiff base ligands: sonochemical synthesis, characterization, molecular modeling and biological activity

The Cr (III), Mn (II), Fe (III), Co (II), Ni (II), Cu (II) and Cd (II) complexes were prepared by reaction of its metal chlorides with new azo‐dye ligand (H2L). The ligand derived from 4,4′‐oxydianiline and 2‐amino‐4‐chlorophenol was synthesized in a 1:2 molar ratio. The structure of the ligand and its metal complexes was investigated using different tools such as elemental analysis (C, H, N and M), molar conductivity, IR, UV–vis, 1H‐NMR, mass spectrometry and thermogravimetric and differential thermogravimetric studies. The data showed that the ligand acted as a N,N,O,O‐binegative tetradentate ligand. All metal complexes had a octahedral structure as depicted by spectral and elemental analyses. The conductivity data showed the electrolytic nature of the Cr (III) and Fe (III) complexes while the other complexes were nonelectrolytes. Thermal analysis studies showed the decomposition of the complexes in four to five steps with the weight loss of hydrated water in the first decomposition step followed by the coordinated water and ligand molecules. Biological activity was tested for the prepared compounds against four bacterial species (Bacillus subtilis, Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa) and against two fungal species (Aspergillus fumigatus and Candida albicans). Also, all complexes were screened for anticancer activities against a breast cancer (MCF‐7) cell line. The [Co(L)(H2O)2] complex showed the lowest IC50 value. Molecular docking is a key tool in computer drug design. Therefore, investigation of protein receptors and ligand interaction plays a vital role in the design of structurally based drugs. As a result, docking studies were investigated for H2L ligand, [Mn(L)(H2O)2] and [Ni(L)(H2O)2] complexes with 5KBC, 3V7B and 4G9M receptors.

Section: Uv-visible Spectra Of the Azo-dye Ligand And Its Metal Commentioning

confidence: 71%

Metal complexes of tetradentate azo‐dye ligand derived from 4,4′‐oxydianiline: Preparation, structural investigation, biological evaluation and MOE studies

Deghadi

Mahmoud

Mohamed

2020

“…In the case of Cu II ‐complex/NaY, the electrostatic attraction between the positive charge of Cu 2+ and the negative charge of microbial cell membranes interferes with the permeability of the membrane and is followed by the penetration of the material particles into the cell. In addition, the crystal size is an important factor in increasing penetration of complexes into lipid membranes. As shown from XRD analysis, Cu II ‐complex/NaY is characterized by a nanometric size with respect to pure Cu II ‐complex, which gives further explanation as to the high anti‐microbial activity against the tested bacteria and fungi.…”

Section: Resultsmentioning

confidence: 99%

New less toxic zeolite‐encapsulated Cu(II) complex nanomaterial for dual applications in biomedical field and wastewater remediation

Khalil

Kishk

EL-Mekkawi

et al. 2019

A new dual‐functional Cu(II) complex and its nanohybrid form encapsulated into NaY zeolite cavities were synthesized. The synthesized compounds were characterized using elemental analyses, X‐ray fluorescence, infrared, 1H NMR, electronic, electron spin resonance and mass spectra, powder X‐ray diffraction, surface area and transmission electron microscopy in addition to conductivity and magnetic susceptibility measurements. The encapsulated Cu(II) complex was catalytically tested for degradation of industrial wastewater. The decolorization and mineralization results indicate that the Cu(II) complex encapsulated into zeolite host is an effective heterogeneous catalyst for real industrial wastewater remediation. In addition, both free and encapsulated Cu(II) complexes were tested as anti‐microbial and anti‐tumour agents. The results show that the Cu(II) complex encapsulated into zeolite has a high activity (IC50 = 14.4 μg ml−1). The results of in vivo toxicity experiments indicate that the Cu(II) complex encapsulated into zeolite is a less toxic biocompatible material (LD50 = 1245 mg kg−1). The catalytic properties, cytotoxicity and toxicity of the new nanohybrid Cu(II) complex encapsulated into zeolite make it a promising eco‐friendly and biocompatible material for water remediation and biomedical applications.

“…Finally, the observed peaks in the XRD F I G U R E 5 Transmission electron microscopy, energy-dispersive X-ray spectroscopy, map, and atomic force microscopy images of CoO nanoparticles F I G U R E 6 Transmission electron microscopy, energy-dispersive X-ray spectroscopy, map, and atomic force microscopy images of CdO nanoparticles spectra of the cobalt and cadmium nano-oxides corresponded to the standard pattern of monoclinical cobalt oxide. [64,65] 3.5 | Biological activity studies…”

Section: F I G U R Ementioning

confidence: 99%

Synthesis, characterization, DNA binding/cleavage, and anticancer and antimicrobial activities: Nano‐sized Co(II) and Cd(II) complexes and their use as a precursor for CoO and CdO nanoparticles

Alothman

Ammar

2020

In the search of effective bioactive compounds, Co(II) (C1) and Cd(II) (C2) complexes of the type [M(FMAPIMP)(H2O)Cl].nH2O (where M = Co(II); n = 2, Cd(II); n = 3, and FMAPIMP = ligand[2‐((E)‐((2‐(((E)‐furan‐2‐ylmethylene)amino)phenyl)imino)methyl)phenol]) were synthesized and characterized using elemental analysis, UV–Vis., cyclic voltammetry, Fourier‐transform infrared (FT‐IR), nuclear magnetic resonance, and mass spectral studies. The thermal stability of nano‐sized Co(II) and Cd(II) complexes was studied using thermogravimetric analysis (TGA). Cobalt and cadmium oxides were synthesized using cobalt and cadmium nanoparticle (NP) structure Schiff base complexes as the raw material after calcination for 5 h at 600 °C. According to the results, Co(II) and Cd(II) complexes with mole ratio 1:1 of metal: H‐FMAPIMP which octahedral are the most probable geometry for it. On the contrary, synthesized C1 and C2 NPs were used as suitable precursors for the preparation of CoO and CdO NPs. The obtained NPs were characterized using FT‐IR, UV–Vis., TGA, powder X‐ray diffraction (PXRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy techniques. PXRD analysis revealed that the obtained oxides were crystalline and corresponded to CoO and CdO phases. Crystal size, shape, and morphology were determined using SEM and TEM. H‐FMAPIMP and its two complexes (C1 and C2) were tested against human ovarian cancer cell line (PA‐1). The synthesized Co(II) and Cd(II) complexes exhibited enhanced activity against the tested bacterial (Staphylococcus aureus and Escherichia Coli) and fungal strains (Candida albicans and Aspergillus fumigatus) as compared to H‐FMAPIMP. The results of the DNA‐cleavage activity indicated that the ligand and its two complexes can cleave calf thymus‐DNA at different degrees. Further, antituberculosis activity was performed using microplate alamarBlue assay. Among all these synthesized compounds, C1 exhibited good cleaving ability compared to the newly synthesized C2. Finally, the geometry of H‐FMAPIMP and its Co(II) and Cd(II) complexes was optimized using molecular modeling.