Y N@C 笼型富勒烯中的热激活延迟荧光：时间分辨发光和 EPR 研究。
Thermally Activated Delayed Fluorescence in a Y N@C Endohedral Fullerene: Time-Resolved Luminescence and EPR Studies.
机构信息
Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470, Mülheim an der Ruhr, Germany.
Institute of Physical Chemistry and Chemical Physics, Slovak University of Technology, Radlinského 9, 81237, Bratislava, Slovakia.
出版信息
Angew Chem Int Ed Engl. 2018 Jan 2;57(1):277-281. doi: 10.1002/anie.201710637. Epub 2017 Dec 8.
The endohedral fullerene Y N@C exhibits luminescence with reasonable quantum yield and extraordinary long lifetime. By variable-temperature steady-state and time-resolved luminescence spectroscopy, it is demonstrated that above 60 K the Y N@C exhibits thermally activated delayed fluorescence with maximum emission at 120 K and a negligible prompt fluorescence. Below 60 K, a phosphorescence with a lifetime of 192±1 ms is observed. Spin distribution and dynamics in the triplet excited state is investigated with X- and W-band EPR and ENDOR spectroscopies and DFT computations. Finally, electroluminescence of the Y N@C /PFO film is demonstrated opening the possibility for red-emitting fullerene-based organic light-emitting diodes (OLEDs).
笼内富勒烯 Y N@C 表现出具有合理量子产率和非凡长寿命的发光。通过变温稳态和时间分辨荧光光谱学，证明在 60 K 以上，Y N@C 表现出热活化延迟荧光，最大发射在 120 K，几乎没有瞬时荧光。在 60 K 以下，观察到寿命为 192±1 ms 的磷光。通过 X 波段和 W 波段电子顺磁共振（EPR）和电子-核双共振（ENDOR）光谱学和密度泛函理论（DFT）计算研究了三重激发态中的自旋分布和动力学。最后，展示了 Y N@C /PFO 薄膜的电致发光，为基于富勒烯的红色有机发光二极管（OLED）的发光开辟了可能性。
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