|
KMID : 0385520110240060451
|
|
Analytical Science & Technology
2011 Volume.24 No. 6 p.451 ~ p.459
|
|
|
Photoluminescence properties of eight coordinated terbium(III) complexes
|
|
Yun Myung-Hee
Kim Yeon-Hee
Choi Won-Jong
Chang Choo-Hwan
Choi Seong-Ho
|
|
|
Abstract
|
|
|
|
Eight coordinated terbium(III) complexes, tris (2-pyrazinecarboxylato)(phenanthroline) terbium(III) [Tb(pzc)_3(phen)], tris (5-methyl-2-pyrazinecarboxylato) (phenanthroline) terbium(III) [Tb(pzc)_3(phen)] and tris(2-picolinato) (phenanthroline) terbium(III) [Tb(pzc)_3(phen)], have been synthesized and characterized by Fourier transform infrared (FT-IR), UV-Visible and X-ray photoelectron spectroscopy. Photoluminescence (PL) spectroscopy shows that these complexes emitted strong green luminescence. When powder samples of the T^3+ complexes are examined using time-resolved spectroscopic analysis, the luminescence lifetimes are found to be 0.87 ms and 1.0 ms, respectively. Thermogravimetric analysis reveals the terbium complexes to have good thermal stability up to 333-379°C. Cyclic voltammetry shows that HOMO-LUMO energy gap of the T^3+ complexes ranges from 4.26~4.41 eV. These values are similar to those obtained from the UV-visible spectra. Overall, the synthesized T^3+ complexes may be useful advanced materials for green light emitting devices.
|
|
|
KEYWORD
|
|
|
pyrazinecarboxylato, picolinato, phenanthroline, eight coordinated terbium(III) complex, photoluminescence, green emission,
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|