Related Experiment Video
Updated: Apr 26, 2026
14:44
Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR
Published on: December 16, 2013
9.3K
Copper(II) complexes with 4-hydroxyacetophenone-derived acylhydrazones: synthesis, characterization, DNA binding and
Ramazan Gup1, Cansu Gökçe1, Selçuk Aktürk2
1Department of Chemistry, Mugla Sıtkı Koçman University, 48100 Mugla, Turkey.
Summary
Two novel copper(II) complexes were synthesized and characterized. These complexes exhibit nuclease activity, effectively cleaving calf thymus DNA (CT-DNA) via an oxidative mechanism, particularly in the presence of hydrogen peroxide.
Area of Science:
- Coordination Chemistry
- Bioinorganic Chemistry
- Materials Science
Background:
- Schiff base-hydrazone ligands are versatile building blocks for metal complexes.
- Copper(II) complexes are of interest due to their diverse biological activities.
- DNA binding and cleavage agents are crucial in medicinal chemistry and molecular biology.
Purpose of the Study:
- Synthesize and characterize novel copper(II) complexes with Schiff base-hydrazone ligands.
- Investigate the interaction of these complexes with Calf thymus DNA (CT-DNA).
- Evaluate the DNA cleavage efficacy of the copper complexes under varying conditions.
Main Methods:
- Synthesis and characterization of two new Cu(II) complexes using spectral and microscopic techniques.
- X-ray powder diffraction to determine structural properties (crystalline vs. amorphous).
- UV-visible spectroscopy for DNA binding studies and agarose gel electrophoresis for DNA cleavage assays.
Main Results:
- Two Cu(II) complexes, [Cu(L(2))₂] (crystalline) and [Cu(H₂L(1))₂]·2H₂O (amorphous), were successfully synthesized.
- Complexes displayed non-covalent binding interactions with CT-DNA.
- Both complexes demonstrated significant nuclease activity, especially in the presence of H₂O₂, indicating an oxidative cleavage mechanism.
Conclusions:
- The synthesized copper(II) complexes exhibit promising DNA binding and cleavage properties.
- Nuclease activity is concentration-dependent and enhanced by oxidative conditions.
- These complexes hold potential as DNA-interacting agents for further investigation.
Related Concept Videos
01:32Aldehydes and Ketones with HCN: Cyanohydrin Formation Overview
3.2K
Cyanohydrins are compounds that contain –CN and –OH groups on the same carbon atom. They are formed by the nucleophilic addition of the cyanide ions to the carbonyl group. Cyanide ions are highly basic and nucleophilic and can be generated from HCN under aqueous conditions. However, since HCN is a weak acid, the number of cyanide ions generated is very small. Hence, a small amount of base or KCN/NaCN is added to HCN to increase the concentration of the cyanide ions in the reaction...
3.2K
01:10Aldehydes and Ketones with HCN: Cyanohydrin Formation Mechanism
3.7K
Cyanohydrins are formed when cyanide nucleophiles and carbonyl compounds like aldehydes and ketones react. A strong base, the cyanide ion, catalyzes cyanohydrin formation. The ions are generated from HCN under aqueous conditions. Once the cyanide ions are generated, the first step involves the nucleophilic attack of the cyanide ions on the electrophilic carbonyl carbon. This attack shifts the π electrons from the C=O to the oxygen atom forming the alkoxide ion intermediate. The alkoxide...
3.7K
01:11Aryldiazonium Salts to Azo Dyes: Diazo Coupling
3.2K
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the...
3.2K
01:19α-Hydroxy Ketones via Reductive Coupling of Esters: Acyloin Condensation Overview
1.3K
The pinacol and McMurry reactions involve the reductive coupling of ketones or aldehydes. Similarly, the bimolecular reductive coupling of two ester molecules in the presence of sodium metal in an aprotic solvent yields an α-hydroxy ketone product. The α-hydroxy ketone is also called acyloin, so the reaction is referred to as ‘acyloin condensation.’
1.3K