Critical Role of Energy Transfer Between Terbium Ions for Suppression of Back Energy Transfer in Nonanuclear Terbium Clusters.
Critical Role of Energy Transfer Between Terbium Ions for Suppression of Back Energy Transfer in Nonanuclear Terbium Clusters.
复制标题
Terbium离子之间的能量转移在非核型Terbium簇中抑制背部能量转移的关键作用。
DOI：
10.1038/srep37008
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发表时间：
2016-11-15
影响因子：
4.6
通讯作者：
Hasegawa Y
中科院分区：
文献类型：
--
作者：
Omagari S;Nakanishi T;Kitagawa Y;Seki T;Fushimi K;Ito H;Meijerink A;Hasegawa Y
镧系元素 (Ln(III)) 配合物是一类重要的高效发光材料，在被周围配体有效吸收光后显示出特征线发射。然而，从 Ln(III) 离子到配体的反向能量转移会降低效率，特别是在较高温度下。在这里，我们报告了一种减少反向能量传输损失的新策略。合成了含有铽和钆离子的非核镧系元素簇，TbnGd9−n簇（[TbnGd9−n(μ-OH)10(水杨酸丁酯)16]+NO3−, n = 0, 1, 2, 5, 8, 9），以研究Tb(III)离子之间的能量转移对反向能量转移的影响。通过稳态和时间分辨光谱技术研究了 TbnGd9−n 团簇的光物理性质，并揭示了随着 TbnGd9−n 团簇中 Tb(III) 离子数量的增加，发射寿命更长。发射寿命与温度相关性的动力学分析表明，Tb(III) 离子之间的能量转移与反向能量转移竞争。实验结果与理论速率方程模型一致，该模型证实了 Tb(III) 离子之间的能量转移在减少反向能量转移损失方面的作用。这些结果为提高镧系配合物的发光效率提供了一种新的分子设计策略，这对于作为发光材料的潜在应用非常重要。
Lanthanide (Ln(III)) complexes form an important class of highly efficient luminescent materials showing characteristic line emission after efficient light absorption by the surrounding ligands. The efficiency is however lowered by back energy transfer from Ln(III) ion to the ligands, especially at higher temperatures. Here we report a new strategy to reduce back energy transfer losses. Nonanuclear lanthanide clusters containing terbium and gadolinium ions, TbnGd9−n clusters ([TbnGd9−n(μ-OH)10(butylsalicylate)16]+NO3−, n = 0, 1, 2, 5, 8, 9), were synthesized to investigate the effect of energy transfer between Tb(III) ions on back energy transfer. The photophysical properties of TbnGd9−n clusters were studied by steady-state and time-resolved spectroscopic techniques and revealed a longer emission lifetime with increasing number of Tb(III) ions in TbnGd9−n clusters. A kinetic analysis of temperature dependence of the emission lifetime show that the energy transfer between Tb(III) ions competes with back energy transfer. The experimental results are in agreement with a theoretical rate equation model that confirms the role of energy transfer between Tb(III) ions in reducing back energy transfer losses. The results provide a new strategy in molecular design for improving the luminescence efficiency in lanthanide complexes which is important for potential applications as luminescent materials.
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影响因子：
3.9
作者：
Jin, T;Inoue, S;Adachi, G
通讯作者：
Adachi, G
影响因子：
6.2
作者：
BEITZ, JV
通讯作者：
BEITZ, JV
影响因子：
4.3
作者：
Casanova, D;Llunell, M;Alvarez, S
通讯作者：
Alvarez, S
影响因子：
4.4
作者：
DEXTER, DL
通讯作者：
DEXTER, DL
影响因子：
3.3
作者：
Karbowiak, M.;Cichos, J.;Buczko, K.
通讯作者：
Buczko, K.