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- E-ISSN 2288-8985
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Photoluminescence properties of eight coordinated terbium(III) complexes
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2011, v.24 no.6, pp.451-459
https://doi.org/10.5806/AST.2011.24.6.451
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(2011). Photoluminescence properties of eight coordinated terbium(III) complexes. Analytical Science and Technology, 24(6), 451-459, https://doi.org/10.5806/AST.2011.24.6.451
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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(mpzc)3(phen)] and tris(2-picolinato) (phenanthroline) terbium(III) [Tb(pic)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 Tb3+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 Tb^(3+)complexes ranges from 4.26~4.41 eV. These values are similar to those obtained from the UV-visible spectra. Overall, the synthesized Tb^(3+) complexes may be useful advanced materials for green light emitting devices.
- keywords
- pyrazinecarboxylato, picolinato, phenanthroline, eight coordinated terbium(III) complex, photoluminescence, green emission
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