title: Synthesis, characterization and luminescence properties of Eu(III) and Tb(III) complexes with novel pyrazole derivatives and 1,10-phenanthroline.
abstract: Two novel pyrazole-derived ligands, 3-chloro-6-(3,5-dimethyl-1H-pyrazol-1-yl)picolinic acid (CDPA) and 3-chloro-6-(3,5-dimethyl-1H-pyrazol-1-yl)-N-phenylpicolinamide (CDPP) were prepared by 3,6-dichloropicolinic acid (DCPA). Their complexes with terbium(III) and europium(III) were synthesized. The complexes were characterized by elemental analysis, infrared spectra, (1)H NMR and TG-DTG. Furthermore, the above complexes using 1,10-phenanthroline as a secondary ligand were also synthesized and characterized. The luminescence properties of these complexes in solid state were investigated. The results suggested that Tb(III) complexes exhibit more efficient luminescence than Eu(III) complexes and the fluorescence of the complexes with 1,10-phenanthroline as a secondary ligand was prominently stronger than that of complexes without this ligand., and the three ligand (DCPA), (CDPP) and (CDPA) are excellent sensitizers to Eu(III) and Tb(III) ion.
authors.affiliation: College of Chemistry and Ecological Engineering, Guangxi University for Nationalities, Nanning 530006, PR China.
authors.forename: Fei-Long
authors.initials: FL
authors.lastname: Hu
authors.forename: Xian-Hong
authors.initials: XH
authors.lastname: Yin
authors.forename: Yan
authors.initials: Y
authors.lastname: Mi
authors.forename: Shan-Shan
authors.initials: SS
authors.lastname: Zhang
authors.forename: Wei-Qiang
authors.initials: WQ
authors.lastname: Luo
mesh_terms: D005063:Europium / Q000737:chemistry* / Q000378:metabolism; D049449:Luminescence; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010618:Phenanthrolines / Q000737:chemistry*; D010848:Picolinic Acids / Q000138:chemical synthesis / Q000737:chemistry* / Q000378:metabolism*; D011720:Pyrazoles / Q000138:chemical synthesis / Q000737:chemistry* / Q000378:metabolism*; D013055:Spectrophotometry, Infrared; D013725:Terbium / Q000737:chemistry* / Q000378:metabolism
chemical_list: C548999:3-chloro-6-(3,5-dimethyl-1H-pyrazol-1-yl)-N-phenylpicolinamide; D009942:Organometallic Compounds; D010618:Phenanthrolines; D010848:Picolinic Acids; D011720:Pyrazoles; D013725:Terbium; D005063:Europium; C025205:1,10-phenanthroline