Helical self-assemblies from organic luminophores generally display significant enhancement of circularly-polarized luminescence (CPL) activity, but their CPL dissymmetry factor (g_lum) is still small. Whether further assembly of helical self-assemblies can further boost the CPL g_lum value is not known. In this paper, helical tetraphenylethylene (TPE) tetracycle tetramine enantiomers were synthesized and showed CPL activity with g_lum at the 10⁻³ level. After the helical enantiomer self-assembled into superhelices together with 4-dodecylbenzenesulfonic acid, the CPL signal was enhanced by more than 60-fold both in solution and in the solid state. Unprecedentedly, the superhelices could further self-assemble together with one enantiomer of tartaric acid (TA) to become longer and wider bundles, which showed a CPL |g_lum| of up to 0.61 and gave the largest CPL enhancement (more than 200-fold) among CPL active materials. But another TA enantiomer aroused no CPL change, showing great potential for chiral recognition of conventional chiral molecules through the CPL spectrum. Moreover, due to the phenyl tilt of the TPE unit, the helical sense of the superhelices is opposite to that of the helical monomer, which was confirmed by theoretical calculations. Meanwhile, thanks to the AIE character of the TPE unit and complete immobilization of its propeller-like conformation, the helical nanofibers displayed a Φ_f of 95%. This finding demonstrates that the CPL dissymmetry factor can be consecutively magnified by formation of superhelices and further assembly of helical self-assemblies, providing a new method for preparing highly active CPL materials.

中文翻译：

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通过进一步组装基于螺旋TPE大环的自组装超螺旋而实现的最大CPL增强

来自有机发光体的螺旋状自组装体通常显示出圆极化发光（CPL）活性的显着增强，但其CPL不对称因子（g _lum）仍然很小。螺旋自组装的进一步组装是否可以进一步提高CPL g _lum值尚不清楚。本文合成了螺旋四苯基乙烯（TPE）四环四胺对映异构体，其CPL活性在10 ^－3时具有g _lum。水平。螺旋对映体与4-十二烷基苯磺酸一起自组装成超螺旋后，在溶液和固态下，CPL信号均增强了60倍以上。前所未有地，超螺旋可以与酒石酸（TA）的一种对映异构体进一步自组装在一起，成为更长和更宽的束，这表明CPL | 3。摹_LUM| 最高可达0.61，并在CPL活性材料中提供了最大的CPL增强（超过200倍）。但是另一种TA对映体没有引起CPL的变化，显示了通过CPL光谱对传统手性分子进行手性识别的巨大潜力。而且，由于TPE单元的苯基倾斜，超螺旋的螺旋方向与螺旋单体的螺旋方向相反，这通过理论计算得到证实。同时，由于TPE单元和其完全固定的AIE字符螺旋桨状的构象，螺旋纳米纤维所显示的Φ _˚F95％。该发现表明，通过形成超螺旋和进一步组装螺旋自组装体，CPL不对称因子可以被连续放大，为制备高活性CPL材料提供了一种新方法。