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Synthesis and luminescence properties of pyrazolone derivatives and their terbium complexes
Author(s) -
Xiao Haihua,
Jiang Xi,
Li Dong,
Wu Limin,
Zhang Wu,
Guo Dongcai
Publication year - 2015
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2804
Subject(s) - terbium , chemistry , molar conductivity , fluorescence , pyrazolone , luminescence , homo/lumo , infrared spectroscopy , elemental analysis , ion , photochemistry , inorganic chemistry , molecule , materials science , organic chemistry , physics , optoelectronics , quantum mechanics
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. Copyright © 2014 John Wiley & Sons, Ltd.