Some new cadmium complexes: Antibacterial/antifungal activity and thermal behavior

Synthesis and Spectral Characterization of Bis(3(4-dimethylaminophenyl)-2-prop-1-enylydene)-1,2-diaminoethane and Some New Mercury Complexes: An Antibacterial and Antifungal Investigation

“…[33] As a sequence of iminic nitrogen participation in binding to mercury ion and the formation of complexes, the first band was shifted to lower wavelengths by 13 nm while the second one (intensive absorption) had extremely red shifted to 364-415 nm. Furthermore, the electronic spectrum of HgLBr 2 exhibited another absorption peak at 467 nm that can be related to metal to ligand charge transfer (MLCT) transition.…”

“…The Schiff base ligand of bis(3-(4-dimethylaminophenyl)-2-prop-1-enylydene)-1,2-diaminoethane was prepared from condensation reaction of ethylene diamine (0.5 mmol, 0.03 g) and 4-dimethylaminophenylpropenal (1 mmol, 0.175 g) in ethanol solvent under rigorous stirring for 5 h. [33] At the end of reaction, the ligand orange precipitate was separated. For more purification of product, it was washed twice with ethanol and then recrystallized from mixture of ethanol/dichloromethane solvents (1:1) to yield the orange crystalline powder in 54%.…”

“…In FT-IR spectrum of the ligand, the absence of functional group absorption frequencies of the initially materials at 1661 cm ¡1 for aldehyde and 3375-3291 cm ¡1 for amine and instead of them, appearance of very strong absorption peak at 1597 cm ¡1 can be considered as an evidence for formation of À ÀCHN bond in the free ligand. [33,35] This characteristic peak shifted by 7-8 cm ¡1 to lower frequencies in the complexes spectra that illustrates important role of the iminic nitrogen in coordination of ligand to metal center. [39] The red-shifting of iminic absorption frequency can be attributed to p-back bonding of metal to p* of azomethine group that trepan a decrease in the electron density Sch.…”

“…[29] These pleasant properties of mercury compounds encouraged us to study of some new mercury complexes. In continuation of our studies on bidentate Schiff base ligands and their four-coordinated complexes, [30][31][32][33][34] and due to the importance of these compounds in bioinorganic chemistry and pharmacology as noted previously, herein the purpose of this study was the synthesis, spectral characterizations of symmetric bidentate Schiff base ligand of and its new mercury(II) complexes with general formula of HgLX 2 [XD Cl ¡ , Br ¡ , I ¡ , SCN ¡ ]. Finally, the in vitro antibacterial/antifungal activity of the ligand and all complexes were scrutinized.…”

Phytochemical and Biological Studies of Some Myrtus (Myrtus communis L.) Populations of South West Region of Zagros (Iran)

“…In-vitro biological activity of the extracts against two Gram negative bacteria such as Escherichia coli (ATCC 25922) and Pseudomonas aeroginosa (ATCC 9027) and Gram-positive bacteria including S. Bacillus subtilis (ATCC: 6633) and also a fungal strain such as A. oryzae, were carried out using the disk diffusion method [30,31]. For this mean, the Petri dishes were prepared as follows: i) a layer of culture medium (Muller Hinton Agar (Merck, Germany) for bacterial strains and Sabouraud dextrose agar (SDA) for fungal strains was poured on the surface of plates, ii) 100 μl of spore suspension of bacteria and/or fungi including nearly 0.5 × 106 colony-forming units (CFU/ml) was inoculated on the surface of culture medium, iii) The prepared discs (that had been soaked in the various concentrations of Extracts; 12.5, 25 and 50 mg/ml in physiological saline) were placed at different positions on a surface of plates.…”