title: Synthesis, characterization and antibacterial activity of mixed ligand dioxouranium complexes of 8-hydroxyquinoline and some amino acids.
abstract: Mixed ligand complexes of dioxouranium(VI) of the type [UO2(Q)(L)-2H2O] have been synthesized using 8-hydroxyquinoline (HQ) as a primary ligand and N- and/or O- donor amino acids (HL) such as L-lysine, L-aspartic acid and L-cysteine as secondary ligands. The metal complexes have been characterized on the basis of elemental analysis, electrical conductance, room temperature magnetic susceptibility measurements, spectral and thermal studies. The electrical conductance studies of the complexes in DMF in 10(-3) M concentration indicate their non-electrolytic nature. Room temperature magnetic susceptibility measurements revealed diamagnetic nature of the complexes. Electronic absorption spectra of the complexes show intra-ligand and charge transfer transitions, respectively. Bonding of the metal ion through N- and O- donor atoms of the ligands is revealed by IR studies and the chemical environment of the protons is also confirmed by NMR studies. The thermal analysis data of the complexes indicate the presence of coordinated water molecules. The agar cup and tube dilution methods have been used to study the antibacterial activity of the complexes against the pathogenic bacteria S. aureus, C. diphtherinae, S. typhi and E. coli.
authors.affiliation: Department of Chemistry, Changu Kana Thakur Arts, Commerce and Science College, New Panvel, Raigad, Maharashtra, India. sunilpatil_247@rediffmail.com
authors.forename: Sunil S
authors.initials: SS
authors.lastname: Patil
authors.forename: Manzoor M
authors.initials: MM
authors.lastname: Shaikh
mesh_terms: D000596:Amino Acids / Q000138:chemical synthesis* / Q000494:pharmacology*; D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects / Q000254:growth & development; D052978:Disk Diffusion Antimicrobial Tests; D004553:Electric Conductivity; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D010087:Oxides / Q000138:chemical synthesis* / Q000494:pharmacology*; D015125:Oxyquinoline / Q000031:analogs & derivatives / Q000138:chemical synthesis* / Q000494:pharmacology*; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013329:Structure-Activity Relationship; D013696:Temperature; D014501:Uranium / Q000494:pharmacology*; D014867:Water / Q000737:chemistry
chemical_list: D000596:Amino Acids; D000900:Anti-Bacterial Agents; D008024:Ligands; D010087:Oxides; C510902:dioxouranium(VI); D014867:Water; D014501:Uranium; D015125:Oxyquinoline