Ni(II)-tetrahedral complexes: characterization, antimicrobial properties, theoretical studies and a new family of charge-transfer transitions.
A new amine containing selenium and their five imine, (SeSchX)(X: -H, F, Cl, Br, CH3), and Ni (II) complexes, [Ni(SeSchX)(H2O)2]Cl/[Ni(SeSchCl)(H2O)Cl], were synthesized. The compounds were characterized by means of elemental analyses, (13)C and (1)H NMR (for imine), FT-IR, UV-Visible spectroscopy, TGA/DTA and elemental analyses. [Ni(SeSchCl)(H2O)Cl] complex from Ni(II) complexes changes color from yellow to orange in the range pH 5-7. [Ni(SeSchCl)(H2O)Cl] complex has ligand-to-metal charge-transfer (LMCT) transitions in the basic medium. Excitation characteristics and energetic of [Ni(SeSchCl)(H2O)Cl] complex, examined via TD-DFT calculations, reveals transitions of LMCT and π→π(*) character that matches the experimental values. [Ni(SeSchCl)(H2O)Cl] complex showed the highest antibacterial activity when compared to other complexes reported in this work.
Gazi University, Faculty of Science, Department of Chemistry, 06500 Ankara, Turkey. nursens@gazi.edu.tr
Nurşen
N
Sarı
Songül Çiğdem
SÇ
Sahin
Hatice
H
Öğütcü
Yavuz
Y
Dede
Soydan
S
Yalcin
Aliye
A
Altundaş
Kadir
K
Doğanay
D000588:Amines / Q000737:chemistry / Q000494:pharmacology; D000890:Anti-Infective Agents / Q000737:chemistry* / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects; D001424:Bacterial Infections / Q000188:drug therapy; D056831:Coordination Complexes / Q000737:chemistry* / Q000494:pharmacology*; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008826:Microbial Sensitivity Tests; D008958:Models, Molecular; D009532:Nickel / Q000737:chemistry* / Q000494:pharmacology*; D012643:Selenium / Q000737:chemistry / Q000494:pharmacology; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared
D000588:Amines; D000890:Anti-Infective Agents; D056831:Coordination Complexes; D009532:Nickel; D012643:Selenium