Synthesis, spectroscopic characterization and antimicrobial activity of binuclear metal complexes of a new asymmetrical Schiff base ligand: DNA binding affinity of copper(II) complexes

Shebl, Magdy

doi:10.1016/j.saa.2013.07.107

Cited by 140 publications

(59 citation statements)

References 82 publications

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“…Thermal gravimetric analysis was used to explore the thermal stability of these newly synthesized compounds and to verify the status of water or solvent molecules whether to be inside or outside of the coordination sphere of the complex compounds [26,50]. The results of thermal analysis of the title compounds are in good agreement with the theoretical formulae as suggested from spectral analyses.…”

Section: Thermal Analysismentioning

confidence: 54%

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Cobalt(II) and Manganese(II) Complexes of Novel Schiff Bases, Synthesis, Charcterization, and Thermal, Antimicrobial, Electronic, and Catalytic Features

Bal

2014

Advances in Chemistry

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Carbazoles containing two new Schiff bases (Z,Z)-N,N -bis[(9-ethyl-9H-carbazole-and their Co(II) and Mn(II) complexes were synthesized and characterized using various spectroscopic methods and thermal analysis, which gave high thermal stability results for the ligands and their cobalt complexes. The title compounds were examined for their antimicrobial and antifungal activities, which resulted in high activity values for the ligands and their manganese complexes. Oxidation reactions carried out on styrene and cyclohexene revealed that the complex compounds were the most effective catalysts for styrene oxidation, giving good selectivities than those of cyclohexene oxidation. Electronic features of the synthesized compounds were also reported within this work.

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Section: Thermal Analysismentioning

confidence: 54%

“…This interest comes from the fact that their metal complexes can be used as antimicrobial, antifungal, and antitumor agents [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Cobalt(II) and Manganese(II) Complexes of Novel Schiff Bases, Synthesis, Charcterization, and Thermal, Antimicrobial, Electronic, and Catalytic Features

Bal

2014

Advances in Chemistry

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“…In general, the toxicity of copper compounds has been exploited to protect agricultural crops from many pests, including those causing fungal infections (Montes et al, 2015;Kalatehjari et al, 2015;Bramhanwade et al, 2016;Epstein and Bassein, 2001;Begum et al, 2015;Fan et al, 2011;El-Habbaa et al, 2016;Wightwick et al, 2008;Stansly and Kostyk, 2015;Thind and Singh, 2015;Ferreira et al, 2007), and copper pesticides are now applied on some "organic" crops (Baker et al, 2002;Winter and Davis, 2006). Their use as an antimicrobial agent has also been considered in several applications (Emam et al, 2014;Shebl, 2014;Mjos et al, 2016;Congrádyová et al, 2014). Accordingly, there is a pressing need for a systematic evaluation of Cu NPs related to their environmental fate, bioavailability, release of Cu + and Cu + 2 ions, and toxicity.…”

Section: Introductionmentioning

confidence: 99%

Comparative environmental fate and toxicity of copper nanomaterials

et al. 2017

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A B S T R A C TGiven increasing use of copper-based nanomaterials, particularly in applications with direct release, it is imperative to understand their human and ecological risks. A comprehensive and systematic approach was used to determine toxicity and fate of several Cu nanoparticles (Cu NPs). When used as pesticides in agriculture, Cu NPs effectively control pests. However, even at low (5-20 mg Cu/plant) doses, there are metabolic effects due to the accumulation of Cu and generation of reactive oxygen species (ROS). Embedded in antifouling paints, Cu NPs are released as dissolved Cu + 2 and in nano-and micron-scale particles. Once released, Cu NPs can rapidly (hours to weeks) oxidize, dissolve, and form CuS and other insoluble Cu compounds, depending on water chemistry (e.g. salinity, alkalinity, organic matter content, presence of sulfide and other complexing ions). More than 95% of Cu released into the environment will enter soil and aquatic sediments, where it may accumulate to potentially toxic levels (> 50-500 μg/L). Toxicity of Cu compounds was generally ranked by high throughput assays as: Cu + 2 > nano Cu(0) > nano Cu(OH) 2 > nano CuO > micron-scale Cu compounds. In addition to ROS generation, Cu NPs can damage DNA plasmids and affect embryo hatching enzymes. Toxic effects are observed at much lower concentrations for aquatic organisms, particularly freshwater daphnids and marine amphipods, than for terrestrial organisms. This knowledge will serve to predict environmental risks, assess impacts, and develop approaches to mitigate harm while promoting beneficial uses of Cu NPs.

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“…The broad bands centered around 3072 cm -1 for 1, 3075 cm -1 for 2, 3068 cm -1 for 3 are assigned to the O-H stretching frequency of the phenolic hydroxyl group. The bands of 1602, 1481 cm -1 for 1, 1608, 1480 cm -1 for 2, 1611, 1482 cm -1 for 3 are assigned to m asym (COO) and m sym (COO), respectively, which indicate bidentate coordination mode [42,43]. The m(C-F) stretching frequencies are assigned to 1,238 cm -1 for 1, …”

Section: Structure Ofmentioning

confidence: 99%

Ligand Structure Induced Diversification from Dinuclear to 1D Chain Compounds: Syntheses, Structures and Fluorescence Properties

Huang

Wang

2014

J Clust Sci

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Using the solvothermal method, we present the comparative preparation of [Zn 2 (Hfhba) 4 (phen) 2 ] (1), [Zn 2 (Hfhba) 4 (2,2 0 -bipy) 2 ] (2) and [Zn 2 (Hfhba) 4 (4,4 0 -bipy) 2 ] n (3), where H 2 fhba is 5-fluoro-2-hydroxy-benzoic acid, phen is 1,10-Phenanthroline, 2,2 0 -bipy is 2,2 0 -Bipyridine, 4,4 0 -bipy is 4,4 0 -Bipyridine. Complexes 1-3 were characterized by elemental analysis, IR, UV-Vis spectroscopy, and X-ray single-crystal diffraction. Complexes 1 and 2 are two new dinuclear complexes and 3 is a 1-D polymer. Luminescent properties of 1-3 have also been studied.

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Synthesis, spectroscopic characterization and antimicrobial activity of binuclear metal complexes of a new asymmetrical Schiff base ligand: DNA binding affinity of copper(II) complexes

Cited by 140 publications

References 82 publications

Cobalt(II) and Manganese(II) Complexes of Novel Schiff Bases, Synthesis, Charcterization, and Thermal, Antimicrobial, Electronic, and Catalytic Features

Cobalt(II) and Manganese(II) Complexes of Novel Schiff Bases, Synthesis, Charcterization, and Thermal, Antimicrobial, Electronic, and Catalytic Features

Comparative environmental fate and toxicity of copper nanomaterials

Ligand Structure Induced Diversification from Dinuclear to 1D Chain Compounds: Syntheses, Structures and Fluorescence Properties

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