Neda Barekzahi; Niloufar Akbarzadeh-T
Abstract
In this project, in the first part, the Schiff base ligand (3-nitrobenzaldehyde + 2-aminothiophenol = H2L) was prepared. Then a nano-complex with the formula [Zn(HL)2Cl2] was synthesized using sonochemical method. Zn-nano-complex was identified by FT-IR, UV-Vis, 1H-NMR and Emission Scanning Electron ...
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In this project, in the first part, the Schiff base ligand (3-nitrobenzaldehyde + 2-aminothiophenol = H2L) was prepared. Then a nano-complex with the formula [Zn(HL)2Cl2] was synthesized using sonochemical method. Zn-nano-complex was identified by FT-IR, UV-Vis, 1H-NMR and Emission Scanning Electron Microscope (SEM). The spectroscopic results showed that the H2L ligand was coordinated to the metal through the N atom. The FT-IR spectrum of Zn-nano-complex showed the vibrational banb of the immunity group (C = N) at 1680-1600 cm-1. The studies obtained from the UV-Vis spectrum confirm n → π* and π→π* intra-ligand transitions. FS-DNA (salmon sperm DNA) and Zn-nano-complex were examined using UV-Vis spectroscopy, fluorescence spectroscopy, and gel electrophoresis. The Stern–Volmer equation was used to calculate the binding constant (Kb) and apparent bimolecular quenching constant (kq) for FS-DNA. Van der Waals forces and hydrogen bonds are important in the interaction between the DNA and the Zn (II) complex, according to an analysis of thermodynamic parameters (∆H°, ΔS° and ΔG°). The interaction mechanism was determined to be the groove-binding mode. These results highlight the complex's complicated effects on DNA structure and the need to use a variety of analytical techniques in order to fully investigate metal-DNA interactions.
Samira Azoogh; Niloufar Akbarzadeh-T; Razieh Razavi
Abstract
A new complex with the formula [Cu(opd)2(H2O)(μ-SCN)Zn(opd)(SCN)3] (a) that opd =ortho-phenylenediamine was synthesized. The complex (a) was characterized using cyclic voltammetry (CV), spectroscopic methods (IR, UV-Vis) and SEM method. FT-IR show the thiocyanate ligand is located in the form of a ...
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A new complex with the formula [Cu(opd)2(H2O)(μ-SCN)Zn(opd)(SCN)3] (a) that opd =ortho-phenylenediamine was synthesized. The complex (a) was characterized using cyclic voltammetry (CV), spectroscopic methods (IR, UV-Vis) and SEM method. FT-IR show the thiocyanate ligand is located in the form of a bridge. The 1-2-phenylenediamine ligand is also bonded to metal ions through the non-bonding electron pairs of nitrogen atoms through bidentate ligand. The studies obtained from the UV-Vis spectrum confirm n → π* and π→π* intra-ligand transitions. The images obtained with the help of scanning electron microscope (SEM) showed that the particles have a uniform morphology. The average size diameter obtained from the Debye-Scherrer equation of nanocrystal complex (a) was approximately 73 nm. Finally, the antibacterial activity of the complex was investigated. The antibacterial activity of complex (a) against gram-negative bacteria is greater than that against gram-positive bacteria.
