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Circularly Polarized Luminescence and Controllable Helical Self-Assembly of An Aggregation-Induced Emission Luminogen

Authors Li, Hongkun HKUST affiliated (currently or previously)
Yuan, Wei
He, Hexiang HKUST affiliated (currently or previously).
Cheng, Zhihui
Fan, Canlong
Yang, Yonggang
Wong, Kam Sing View this author's profile
Li, Yongfang
Tang, Benzhong View this author's profile
Issue Date 2017
Source Dyes and Pigments , v. 138, March 2017, p. 129-134
Summary A new chiral tetraphenylethene derivative with two L-leucine-containing attachments, TPE-DLEU, has been designed and synthesized by Cu(I)-catalyzed azide-alkyne cycloaddition “click” reaction. It emits faintly and gives weak circular dichroism (CD) signals in solutions, but shows strong fluorescence and Cotton effects in the aggregated state, showing aggregation-induced emission (AIE) and CD (AICD) characteristics. Furthermore, its film displays circularly polarized luminescence (CPL) with an emission dissymmetry factor of +3.2 × 10−3. Interestingly, TPE-DLEU exhibits controllable helical self-assembly behaviours. It could readily assemble into right-handed helical nanofibers upon the evaporation of its 1,2-dichloroethane (DCE) solution, but form left-handed helical nanofibers by the addition of hexane to its DCE solution. © 2016 Elsevier Ltd
ISSN 0143-7208
Language English
Format Article
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