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Discrete face-to-face stacking of anthracene inducing high-efficiency excimer fluorescence in solids via a thermally activated phase transition
Shen, Y.; H. C. Liu; S. T. Zhang; Y. Gao; B. Li; Y. Yan; Y. S. Hu; L. J. Zhao and B. Yang
2017
Source PublicationJournal of Materials Chemistry C
Volume5Issue:38
AbstractIt is always a challenge for planar polycyclic aromatic molecules to achieve high efficiency in solids owing to their frequent encounter with aggregation-caused quenching (ACQ). An anthracene derivative with one-side meta-substituted triphenylamine (TPA) was found to show high-efficiency excimer fluorescence (eta(PL) = 76.8%) in G-phase (green) crystals as well as a long lifetime, in sharp contrast with that of a monomer in a doped film (eta(PL) = 36.6%) and that of B-phase (blue) crystals (eta(PL) = 8.1%). In essence, the excimer-induced enhanced emission can be ascribed to the special intermolecular stacking in the solid state, namely, discrete antiparallel dimeric stacks between anthracene moieties in G-phase crystals, which are responsible for greatly suppressed non-radiative deactivation due to a uniform emissive state preventing the formation of an energy-trapping "dark'' state. Moreover, a G-phase could be obtained through a thermally-activated phase transition from B-phase crystals, corresponding to the completely synchronized change of fluorescence properties. The present results consolidate a novel strategy of designing discrete dimeric stacking of planar polycyclic aromatic molecules to achieve high-efficiency fluorescence in the solid state by an excimer-induced enhanced emission (EIEE) mechanism.
Indexed Bysci ; ei
Language英语
Document Type期刊论文
Identifierhttp://ir.ciomp.ac.cn/handle/181722/59181
Collection中科院长春光机所知识产出
Recommended Citation
GB/T 7714
Shen, Y.,H. C. Liu,S. T. Zhang,et al. Discrete face-to-face stacking of anthracene inducing high-efficiency excimer fluorescence in solids via a thermally activated phase transition[J]. Journal of Materials Chemistry C,2017,5(38).
APA Shen, Y..,H. C. Liu.,S. T. Zhang.,Y. Gao.,B. Li.,...&L. J. Zhao and B. Yang.(2017).Discrete face-to-face stacking of anthracene inducing high-efficiency excimer fluorescence in solids via a thermally activated phase transition.Journal of Materials Chemistry C,5(38).
MLA Shen, Y.,et al."Discrete face-to-face stacking of anthracene inducing high-efficiency excimer fluorescence in solids via a thermally activated phase transition".Journal of Materials Chemistry C 5.38(2017).
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