Synthesis and Luminescence of a Series Terbium Ternary Complexes with 1-Phenyl-3-methyl-4-acyl-5-pyrazolones

Abstract

Abstract: Aseries of terbium ternary complexes with 4-acyl substituted pyrazolones:Tb(L)₃. 2H₂Oand Tb(L)₃. Dipy, where L=1-phenyl-3-methyl-4-acetyl-5-pyrazolone (PMAP ), 1-phenyl-3-methyl-4-propionyl-5-(PMPP), 1-phenyl-3-methyl-4-isobutyryl-5-pyrazolone (PMIBP), 1-phenyl-3-methyl-4-pivaloyl-5-p (PMPVP) and 1-phenyl-3-methyl-4-benzoyl-5-py (PMBP ), Dipy=2, 2'-dipyridyl, were synthe-sized and identified by elementary analysis. The complexes were characterized by FT-IR,UV-Vis spectra and TG-DTAanalysis. The luminescences from both the solid state and so-lution were studied and their fluorescence lifetime was determined by using the frequency-do-main method. The results show that both fluorescence intensities and lifetime of these com-plexes strongly depend on the structure of the substituted 4-acyl groups. The fluorescence intensities of the alkyl acyl substituted pyrazolone terbium complexes are three orders magni-tude stronger than that of Tb (PMBP)₃ 2H₂O, and the introduction of the neutral ligand (Dipy) can enhance the fluorescence intensities of the complexes

Key words: Terbium, 1-Phenyl-3-methyl-4-acyl-5-pyraz, Complex, Fluorescence

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LI Qin, ZHOU De-Jian, HUANG Chun-Hui, YAO Guang-Qing, S. Umetani, M. Matsui. Synthesis and Luminescence of a Series Terbium Ternary Complexes with 1-Phenyl-3-methyl-4-acyl-5-pyrazolones[J]. Chem. J. Chinese Universities, 1997, 18(6): 829.

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Synthesis and Luminescence of a Series Terbium Ternary Complexes with 1-Phenyl-3-methyl-4-acyl-5-pyrazolones

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