Aggregation-Induced Emission Enhancement of Aryl-Substituted Pyrrole Derivatives
The Journal of Physical Chemistry B2010Vol. 114(50), pp. 16731–16736
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Xiao Feng, Bin Tong, Jinbo Shen, Jianbing Shi, Tianyu Han, Long Chen, Junge Zhi, Ping Lü, Yuguang Ma, Yuping Dong
Abstract
The relationship between the structures and light emission properties of five aryl-substituted pyrrole derivatives was studied during aggregation in THF-water mixtures. Only pentaphenylpyrrole clearly shows, however, an aggregation-induced emission enhancement (AIEE) phenomenon. On comparison of the optical properties and single-crystal structures of these pyrrole derivatives, it is suggested that the more twisted configuration which prevented parallel orientation of conjugated chromophores combined with the restricted intramolecular rotation (RIR) effect was the main cause of the AIEE phenomenon.
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