Aggregation-Induced Emission: Effects of Molecular Structure, Solid-State Conformation, and Morphological Packing Arrangement on Light-Emitting Behaviors of Diphenyldibenzofulvene Derivatives
Aggregation-Induced Emission: Effects of Molecular Structure, Solid-State Conformation, and Morphological Packing Arrangement on Light-Emitting Behaviors of Diphenyldibenzofulvene Derivatives
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DOI：
10.1021/jp0630828
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发表时间：
2007-01
影响因子：
3.7
通讯作者：
H. Tong;Yongqiang Dong;Yuning Hong;M. Häussler;J. Lam;H. Sung;Xiaoming Yu;Jiaxin Sun;Ian D. W
中科院分区：
文献类型：
--
作者：
H. Tong;Yongqiang Dong;Yuning Hong;M. Häussler;J. Lam;H. Sung;Xiaoming Yu;Jiaxin Sun;Ian D. W
Propeller-shaped molecules diphenyldibenzofulvene (1) and (4-methoxyphenyl)phenyldibenzofulvene (2) were nonemissive when dissolved in good solvents but became luminescent when aggregated in poor solvents or in the solid state, showing a novel phenomenon of aggregation-induced emission (AIE). 8-Phenylbenzo[e]acephenanthrylene (3), a ring-closed form of 1 with one of its phenyl blades locked, was emissive in the solutions, suggesting that the AIE effects of 1 and 2 are caused by the restrictions of intramolecular rotations of their aromatic blades in the aggregation state. The crystals of 1 and 2 emitted stronger, bluer lights than their amorphous powders, possibly due to the structural rigidification and conformational twisting of the dye molecules in the crystalline phase. The light-emitting diodes with a device configuration of ITO/NPB/dye/BCP/Alq3/LiF/Al were fabricated, which emitted bluish-green and yellow lights with maximum luminance and current efficiency up to 5000 Cd/m2 and 1.90 Cd/A, respectively.
