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(: R)-Binaphthyl derivatives as chiral dopants: Substituent position controlled circularly polarized luminescence in liquid crystals
A series of nonbridged axially chiral binaphthyl derivatives were synthesized and used as chiral dopants for chiral nematic liquid crystals (N?-LCs). It was found that binaphthyl derivatives substituted at 3,3? positions or 2,2? positions of binaphthyl rings could induce N?-LCs to show opposite circularly polarized luminescence (CPL) signals, despite having the same configuration. Additionally, a CPL switch could be constructed in these N?-LCs regulated by the applied electric field.
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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI