Regulating Circularly Polarized Luminescence Signals of Chiral Binaphthyl-Based Conjugated Polymers by Tuning Dihedral Angles of Binaphthyl Moieties

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• 作者：Yuxiang Wang ; Yunzhi Li ; Shuai Liu ; Fei Li ; Chengjian Zhu ; Shuhua Li ; Yixiang Cheng
• 刊名：Macromolecules
• 出版年：2016
• 出版时间：August 9, 2016
• 年：2016
• 卷：49
• 期：15
• 页码：5444-5451
• 全文大小：435K
• 年卷期：0
• ISSN：1520-5835

文摘

A series of chiral binaphthyl-based conjugated polymers enantiomers incorporating boron dipyrromethene (BODIPY) chromophore in the main chain backbone were designed and synthesized by Pd-catalyzed Sonogashira cross-coupling reaction. All of them can exhibit strong Cotton effects and circularly polarized luminescence (CPL) emission signals in THF solution. The CD absorption dissymmetry factors (g_abs) and the luminescence dissymmetry factors (g_lum) can be regulated by tuning the dihedral angles of binaphthyl arising from different substitutions of BINOL hydroxyls. Interestingly, the chiral polymers can exhibit the gradual increase of both g_abs and g_lum as the decrease of dihedral angles of the chiral binaphthyl moiety. This work can provide a new strategy for the development of CPL emission materials.