title: Syntheses, characterization, biological activity and fluorescence properties of bis-(salicylaldehyde)-1,3-propylenediimine Schiff base ligand and its lanthanide complexes.
abstract: Eight new lanthanide metal complexes [LnL(NO(3))(2)]NO(3) {Ln(III) = Nd, Dy, Sm, Pr, Gd, Tb, La and Er, L = bis-(salicyladehyde)-1,3-propylenediimine Schiff base ligand} were prepared. These complexes were characterized by elemental analysis, thermogravimetric analysis (TGA), molar conductivity measurements and spectral studies ((1)H NMR, FT-IR, UV-vis, and luminescence). The Schiff base ligand coordinates to Ln(III) ion in a tetra-dentate manner through the phenolic oxygen and azomethine nitrogen atoms. The coordination number of eight is achieved by involving two bi-dentate nitrate groups in the coordination sphere. Sm, Tb and Dy complexes exhibit the characteristic luminescence emissions of the central metal ions attributed to efficient energy transfer from the ligand to the metal center. Most of the complexes exhibit antibacterial activity against a number of pathogenic bacteria.
authors.affiliation: Department of Applied Chemical Sciences, Jordan University of Science and Technology, Irbid 22110, Jordan. tahaz33@just.edu.jo
authors.forename: Ziyad A
authors.initials: ZA
authors.lastname: Taha
authors.forename: Abdulaziz M
authors.initials: AM
authors.lastname: Ajlouni
authors.forename: Khader A
authors.initials: KA
authors.lastname: Al-Hassan
authors.forename: Ahmed K
authors.initials: AK
authors.lastname: Hijazi
authors.forename: Ari B
authors.initials: AB
authors.lastname: Faiq
mesh_terms: D000447:Aldehydes / Q000737:chemistry; D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D005453:Fluorescence; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D008024:Ligands; D008163:Luminescent Measurements; D009682:Magnetic Resonance Spectroscopy; D008826:Microbial Sensitivity Tests; D008954:Models, Biological; D012545:Schiff Bases / Q000138:chemical synthesis* / Q000737:chemistry* / Q000494:pharmacology*; D013055:Spectrophotometry, Infrared; D013057:Spectrum Analysis / Q000379:methods; D013818:Thermogravimetry
chemical_list: D000447:Aldehydes; D056831:Coordination Complexes; D028581:Lanthanoid Series Elements; D008024:Ligands; D012545:Schiff Bases; C013243:salicylaldehyde