镧系元素
激发态
能量转移
光致发光
材料科学
离子
发光
冲击波
空气动力学
化学
原子物理学
化学物理
热力学
光电子学
物理
有机化学
作者
Yuichi Hirai,A. Kotani,Hirotaka Sakaue,Yuichi Kitagawa,Yasuchika Hasegawa
标识
DOI:10.1021/acs.jpcc.9b08349
摘要
Triboluminescence (TL) has been known since the 17th century and is observed in various solid-state materials, but the fundamental mechanisms have still not been elucidated due to the limited access to quantitative photophysical information compared to that for photoluminescence (PL). With the aim of determining the difference between TL and PL using general photophysical parameters, we used aerodynamic shock waves as pulsed mechanical forces to estimate the TL lifetimes (τTL) of lanthanide(III) coordination polymers [Ln(hfa)3(dpf)]n (Ln = Eu, Tb, or mixture thereof; hfa = hexafluoroacetylacetonate; dpf = 2,5-bis(diphenylphosphoryl)furan). Interestingly, the Tb(III)-centered τTL of Tb(III)/Eu(III) mixed compounds showed a slight difference from that of a Tb(III) pure compound, being in agreement with a previous observation that the green emission from Tb(III) ions was more dominant in TL than in PL. The results strongly indicated that Tb(III)-to-Eu(III) excited energy transfer was reduced under the condition of grinding.
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