The Tröger's base derivative rac-TBPP was synthesized and separated into two enantiomers R_2N-TBPP and S_2N-TBPP by chiral column chromatography. These compounds show a strong circularly polarized luminescence with g_lum values of +0.0021, and −0.0025, respectively. The second way to fabricate the rac-TBPP-based CPL-active material is to co-gel the fluorescent rac-TBPP with a chiral ᴅ-glutamic acid gelator DGG by co-assembly strategy. At the molar ratio of rac-TBPP/DGG = 1:80, the g_lum value of the co-gel was about three times higher than the g_lum values of R_2N-TBPP and S_2N-TBPP enantiomers. Interestingly, the CPL handedness of the rac-TBPP/DGG co-gel could be adjusted effectively by changing their stoichiometric ratios.

中文翻译：

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Tröger 基衍生物通过两种不同策略制备的圆偏振发光系统

合成了Tröger的碱衍生物rac - TBPP ，并通过手性柱色谱分离成两种对映体R _2N - TBPP和S _2N - TBPP 。这些化合物表现出强烈的圆偏振发光，g _lum值分别为+0.0021 和-0.0025。制造基于rac - TBPP的 CPL 活性材料的第二种方法是通过共组装策略将荧光rac - TBPP与手性 ᴅ-谷氨酸凝胶剂DGG共凝胶。当rac - TBPP / DGG的摩尔比=1:80时，共凝胶的glum值比R 2N _- TBPP和S 2N _{- TBPP}对映体的glum值高_约3倍。有趣的是，外消旋-TBPP / DGG共凝胶的CPL手性可以通过改变它们的化学计量比来有效调节。