Novel biological active nanostructure cadmium coordination compounds: Thermal analyses data and usage as new precursors for preparation of cadmium oxide nanoparticles (original) (raw)
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Nanochemistry Research, 2016
Here, we report the synthesis of a Schiff-base mixed-ligand complex of cadmium(ІІ) in bulk and nano-scales via the precipitation and sonochemical methods, respectively. The complex formula is [Cd(3-bpdh)(3-bpdb)Cl2]n (1), where the ligands are 3-bpdh = 2,5-bis(3-pyridyl)-3,4-diaza-2,4-hexadiene and 3-bpdb = 1,4-bis(3-pyridyl)-2,3-diaza-1,3-butadiene. The structure of mixed-ligand complex (1) was characterized by IR, 1H NMR and elemental analyses. Cadmium(ІІ) oxide nanoparticles were prepared by direct thermolysis from nanosheet of complex (1). The cadmium(ІІ) oxide structure was characterized by X-ray Diffraction (XRD) and Energy Dispersive X-ray analyses (EDAX). Size, morphology and structural dispersion of all obtained nanostructures were characterized by Scanning Electron Microscopy (SEM). The Schiff-base ligands, bulk and nano-scales of complex (1) and cadmium(ІІ) oxide nanoparticles were analyzed for antibacterial activities against Bacillus alvei (bacteria causing the honey bee European foulbrood disease). The Minimum Inhibitory Concentrations (MIC) has been shown moderate antibacterial activities compared with some other standard drugs. Known antibiotics like penicillin and SXT (Trimethoprim/sulfamethoxazole) were used as positive control.
International Journal of Scientific Research in Biological Sciences, 2019
Transition metal complex of Cd (II) with tetradentate schiff base derived from the condensation of 4-nitro-1,2diamino benzene and 5-nitro-salicyldehyde (H2L) have been synthesized. The synthesized square planar complex was investigated using elemental analysis (C, H and N), infrared, conductivity and electronic spectroscopic tools. The interactions of cadmium (II) complex examined towards Bovine serum albumin (BSA) with the help of absorption and fluorescence spectroscopic tools. The complex is strongly binds to proteins, then we study the antibacterial activity of the Schiff base and its cadmium complex by agar disc diffusion method against some species of pathogenic bacteria (Escherichia coli, Vibrio cholerae, Streptococcus pneumonia and Bacillus cereus).The result indicated that cadmium complex was more activity than ligand due to higher lipophilicity effect.
2013
A new symmetrical bidentate Schiff base ligand (L) was applied for the synthesis of some new cadmium coordination compounds with general formula of [Cd(L)X2] in which X is halide and pseudo-halide. The ligand and all cadmium complexes were characterized by some techniques such as elemental analysis, FT-IR, 1H, 13C NMR, UV-Visible and molar conductance. Electrochemical behavior of ligand and Cd(II) complexes were investigated by cyclic voltammetry method. Morphology and shape of [Cd(L)Cl2] particles were depicted by SEM. Antimicrobial properties such as antibacterial and antifungal activities of the complexes as compared with ligand were checked against three Gram-negative bacteria; Escherichia coli (ATCC 25922), Pseudomunase aeroginosa (ATCC 9027) and Salmonella Spp. and two Grampositive bacteria; Staphylococcus aureus (ATCC 6538) and Corynebacterium renale and three fungal strains including Aspergillus Niger, Penicillium chrysogenum and Candida albicans. The results revealed appropriate antibacterial and antifungal activities for all compounds, and it was also found that the coordination of ligand to Cd (II) lead to an increase in the antimicrobial activities in most of cases.
Journal of Saudi Chemical Society, 2017
The photophysical properties of luminescent tetra-coordinated cadmium (II) complex formulated as [Cd(L)Cl],HL = (1-[(3-methyl-pyridine-2-ylimino)-methyl]-naphthalen-2-ol) were synthesized and characterized by analytical and spectroscopic methods. The density function theory calculations are used to investigate the electronic structures of the ligand and its complex. The interactions of cadmium (II) complex towards bovine serum albumin (BSA) and human serum albumin (HSA) were investigated using absorption and fluorescence spectroscopic techniques at pH 7.4. The quenching constants, binding constants and number of binding sites were determined by fluorescence quenching method. The calculated thermodynamic parameters (DG, DH, and DS) confirmed that the binding reaction is mainly entropy-driven and hydrophobic forces played an important role in the reaction. Here, we proposed a new synthetic procedure for the preparation of BSA and HSA with cadmium complex nanowires. The scanning electron microscopy images show that BSA and HSA with cadmium complex product are wire-like in structure. The complex shows enhanced antibacterial activity compared with the free ligand and standard antibiotic chloramphenicol. Antioxidant studies showed that the complex has significant antioxidant activity against DPPH.
Research on chemical intermediates, 2024
At the nanoscale level, several biological processes take place, owing to the potential that engineered nanomaterials might interrelate with bio-molecules and cellular procedures. This study aimed to synthesize cadmium oxide nanoparticles via a one-step calcination process of tetradentate Schiff base-Cd(II) complex at different temperature ranges. The as-synthesized compounds were carried out via a viz UV-visible, elemental analysis, 1 H NMR, molar conductivity, transmission electron microscopy (TEM), FT-IR spectroscopy, and X-ray diffraction (PXRD). The band gap energy and average particle sizes of the CdO particles are respectively (2.69 eV, 3.54 eV), 26.88 nm for CdO@250, and (3.20 eV, 3.57 eV), 25.67 nm for CdO@300, while CdO@350 exhibited the 3.78 eV and 28.42 nm values. The antioxidant accomplishments of the test samples through the scavenging activity of DPPH radicals showed CdO@300 to possess (IC 50 = 5.18 ± 0.56 µg/mL). Similarly, the as-synthesized CdO nanoparticles exhibited higher antibacterial activities against S. aureus and E. coli as compared to the corresponding Cd-HMB and ligand (HMB), while ciprofloxacin acted as a standard antibiotic. Furthermore, HMB and its complex Cd-HMB were docked against the DNA gyrase enzymes of S. aureus (PDB IDs: 5CDQ) and E. coli (PDB IDs: 6F86) as receptors. The binding sites docking results showed that the binding energies of HMB and Cd-HMB to 5CDQ ranged from − 3.44 to − 4.99 kcal/mol and from − 6.45 to − 6.64 kcal/mol, while the binding energies related to the target 6F86 are in the ranges of (− 3.64, − 4.76) kcal/ mol and (− 6.08, − 6.09) kcal/mol respectively. Therefore, the significant antioxidant and antibacterial activities of the ligand (HMB), Cd-HMB, and CdO NPs review the broad application prospects of these compounds as therapeutic agents for wideranging biomedical applications.
Journal of Physics: Conference Series, 2021
This study focuses on the synthesis of the 2-[2\-(5-bromo thiazolyl) azo]-5-di-methyl amino benzoic acid (5-BrTAMB) and Cd(II) coordinate complex. Diazotization by 2-amino-5- bromo thiazole and mixation by an alkaline alcohol solution of the 3-dimethyl amino benzoic acid. Various analytical techniques, including 1H-NMR, mass spectral, FT-IR spectra, UV-Vis, elemental analysis (C.H.N.S), measurement of electrical conductivity, magnetic susceptibility, TGA, XRD data and SEM spectra support azo ligand structures and their metal complex. The ligand is the trident N, N, O donor and forms the ML2 [metal-ligand] stoichiometry complex. Cd(II)-complex is found to have exhibited octahedral geometry. The ligand and its metal complex were screened against A. Niger for their antifungal activity and antibacterial activity against S. Aurores and E. Coli.
Chemistry Central journal, 2016
The coordination chemistry of cadmium(II) with diamine ligands is of particular interest. The most common structure around cadmium(II) center in their complexes is tetrahedral, that is due the octet rule obeyed. Nevertheless, five and six-coordinated complexes are also well known. Now a day, many cadmium(II) complexes with chelate ligands were synthesized for their structural or applications properties. Antibacterial activities and DNA binding affinity of this class of cadmium complexes have attracted considerable interest. Cadmium(II) complexes in dicationic form with general formula [Cd(dien)2]CdBr4 complex 1 (dien = diethylenetriamine) and [Cd(dipn)2]CdBr4 complex 2 (dipn = diproylenetriamine) were prepared and elucidated there chemical structures by elemental analysis, UV-Vis, IR, TG and NMR, additionally complex 1 structure was solved by X-ray diffraction study. The Cd(II) cation is located in a slightly distorted octahedral geometry while Cd(IV) anion is in tetrahedral geometr...
Journal of Inorganic and Organometallic Polymers and Materials, 2012
A one-dimensional Cd(II) coordination polymer containing 2-pyridinecarboxylate (2-pyc-) and iodide anions [Cd(l-2-pyc)(l-I)] n (1), is synthesized and characterized by elemental analysis, IR spectroscopy, thermal analysis and X-ray crystallography. The single-crystal X-ray data show that the coordination number for the Cd 2? ion is five. The thermal stability of 1 was studied by thermogravimetry and differential thermal analyzes. Cd(II)O nanoparticles were prepared by direct calcination of 1 at different temperatures. The Cd(II)O nanoparticles were characterized by X-ray powder diffraction and scanning electron microscopy. The results show that the morphology of the Cd(II)O nanoparticles is dependent upon the thermolysis temperature. Keywords Coordination polymer Á Cadmium(II) oxide Á Nanoparticles Á Thermolysis Á X-ray crystallography Á X-ray powder diffraction Á Scanning electron microscopy
Synthesis And Characterization of Cadmium Oxide Nanoparticles for Antibacterial Activity
,3rd International Conference on Communication and Electronics Systems (ICCES 2018) IEEE sponsored, Coimbatore, India, October 2018., 2018
The work reported here deals with synthesis and characterization of cadmium oxide nanoparticles. The main goal of this synthesis to study antibacterial effects of cadmium oxide nanoparticles. This study includes characterization using microscopic and spectroscopic studies.
The sequential reaction of a multisite coordinating compartmental ligand N,N 0-Bis(3-methoxysalicylidenimino)-1,3-diaminopropane (H 2 L 1) with Cd(OAc) 2 followed by the addition of NaCl in a 2:3:2 stoichiometric ratio affords homometallic trinuclear Cd(II) coordination compound [Cd 3 (L 1) 2 (Cl) 2 ] (1). The complex 1 has been thoroughly characterized by common elemental analysis (CHN), FT-IR and UVeVis spectroscopy. Single crystal X-ray diffraction was also performed to determine the complete structure of complex 1. X-ray diffraction studies reveal that the molecular complex comprises a linear tri-nuclear ensemble of cadmium metal ions, which is further supported by the concerted coordination action of two dianionic [L 1 ] 2e ligands along with two monodentate Cl À ligands. The central Cd(II) ion is attached to the terminal Cd(II) ions through two phenoxide bridging groups of the fully deprotonated ligands [L 1 ] 2e. This arrangement leads to two neighbouring four membered Cd 2 O 2 rings. The terminal Cd(II) ions are penta-coordinated (2 N, 2O, Cl) in a distorted square pyramidal geometry and central Cd(II) ion attained distorted trigonal prismatic geometry through six oxygen atoms coordination from ligands. Tri-nuclear Cd(II) complex 1 display intraligand (pdp *) fluorescence in DMSO solution at room temperature. The fluorescence properties of complex 1 as well as the respective di-compartmental Schiff base ligand (H 2 L 1) have been investigated in DMSO solvent at room temperature with a comparative approach. Result confirmed that complex 1 is highly fluorescence active mediated due to " chelation enhanced fluorescence " [CHEF] but Schiff base ligand (H 2 L 1) is fluorescence silent. The anti-bacterial efficacy of complex 1 was further investigated against some important Gram-positive and Gram-negative bacteria.