Study of lanthanide liquid-crystalline complexes by Photoacoustic and luminescence spectroscopy |
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| Authors: | Yue-tao Yang Jun-jia Li Xiao-jun Liu Shu-yi Zhang |
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| Institution: | (1) Key Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing, 210093, P.R. China |
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| Abstract: | Lanthanide complexes Ln(bta)3L2 (Ln3+: Eu3+, Tb3+ and Ho3+; bta: benzoyltrifluoroacetonate; L: N-octadecyl-2-hydroxy-4-tetradecyloxybenzal- dimine) are synthesized. Their photoacoustic
(PA) spectra are reported and interpreted. In the region of ligand absorption, PA intensity increases for Eu(bta)3L2, Tb(bta)3L2 and Ho(bta)3L2, respectively. It is found that the PA intensity of the ligand bears a relation to the intramolecular energy transfer process.
By comparison with luminescence spectra, the energy transfer process and phase transition of lanthanide complexes are studied
from two aspects: radiative and nonradiative processes. |
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