title: Synthesis and luminescence properties of pyrazolone derivatives and their terbium complexes.
abstract: Seven novel pyrazolone derivatives were synthesized and characterized by (1) H NMR and (13) C NMR spectra, mass spectra, infrared spectra and elemental analysis. Their terbium complexes were prepared and characterized by elemental analysis, EDTA titrimetric analysis, UV/vis spectra, infrared spectra and molar conductivity, as well as thermal analysis. The fluorescence properties and fluorescence quantum yields of the complexes were investigated at room temperature. The results indicated that pyrazolone derivatives had good energy-transfer efficiency for the terbium ion. All the terbium complexes emitted green fluorescence characteristic of terbium ions, possessed strong fluorescence intensity, and showed relatively high fluorescence quantum yields. Cyclic voltammograms of the terbium complexes were studied and the highest occupied molecular orbital (HOMO) and lowest occupied molecular orbital (LUMO) energy levels of these complexes were estimated.
authors.affiliation: School of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.|Hunan Xiangjiang Kansai Paint Co. Ltd, Changsha, 410000, China.
authors.forename: Haihua
authors.initials: H
authors.lastname: Xiao
authors.affiliation: School of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.
authors.forename: Xi
authors.initials: X
authors.lastname: Jiang
authors.affiliation: School of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Li
authors.affiliation: School of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.
authors.forename: Limin
authors.initials: L
authors.lastname: Wu
authors.affiliation: School of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.
authors.forename: Wu
authors.initials: W
authors.lastname: Zhang
authors.affiliation: School of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.
authors.forename: Dongcai
authors.initials: D
authors.lastname: Guo
mesh_terms: D055664:Electrochemical Techniques; D049449:Luminescence; D049408:Luminescent Agents / Q000138:chemical synthesis / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D047069:Pyrazolones / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013725:Terbium / Q000737:chemistry*
chemical_list: D049408:Luminescent Agents; D047069:Pyrazolones; D013725:Terbium
keywords: cyclic voltammetry; fluorescence quantum yield; pyrazolone; synthesis; terbium complex