Tuning the Circularly Polarized Luminescence of Supramolecules via Self-Assembly Morphology Control,ACS Macro Letters

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Tuning the Circularly Polarized Luminescence of Supramolecules via Self-Assembly Morphology Control
ACS Macro Letters ( IF 5.1 ) Pub Date : 2022-09-09 , DOI: 10.1021/acsmacrolett.2c00382
Junfeng Li ₁ , Xuelei Peng ₁ , Dong Chen ₁ , Shunan Shi ₁ , Jiamian Ma ₁ , Wen-Yong Lai _{1,

2}

Affiliation

Tuning the circularly polarized luminescence (CPL) is a paramount yet challenging issue in the research field of chiral materials. Here, the chiral supramolecules were constructed with a chiral inducer LL-diphenylalanine (LPFF) and a triphenyl-1,3,5-triazine-derived achiral molecule (DMAC-TRZ) to generate differentiated aggregates, giving rise to tunable responses of CPL. Specifically, the well-defined supercrystallines had an exceptional superior CPL emission located at 485 nm with a large luminescence dissymmetry factor (g_lum) value as high as +0.16, whereas the formed organic gel possessed a relatively strong CPL emission peaked at 495 nm with a g_lum value of −0.04 in respect to the water fraction about 50%. The distinguished g_lum value was assigned to the choice of spatial arrangement of the π-chromophores of DMAC-TRZ responding to the volume water fraction in the H₂O/DMSO system, resulting in a tunable g_lum value. This strategy provides an efficient way to regulate CPL signals by modulating the π-stacking way of organic materials responding to external stimuli.

中文翻译：

通过自组装形态控制调节超分子的圆偏振发光

调谐圆偏振发光（CPL）是手性材料研究领域中最重要但最具挑战性的问题。在这里，手性超分子是用手性诱导剂LL -二苯丙氨酸 (LPFF) 和三苯基-1,3,5-三嗪衍生的非手性分子 (DMAC-TRZ) 构建的，以产生差异化的聚集体，从而产生 CPL 的可调响应。具体而言，定义明确的超晶体在 485 nm 处具有异常优异的 CPL 发射，发光不对称因子 ( g _lum ) 值高达 +0.16，而形成的有机凝胶在 495 nm 处具有相对较强的 CPL 发射峰值相对于约 50% 的水分数， g _lum值为 -0.04。尊贵的将g _lum值分配给 DMAC-TRZ 的 π-发色团的空间排列选择，以响应 H ₂ O/DMSO 系统中的体积水分数，从而产生可调的_glum值。该策略通过调节响应外部刺激的有机材料的 π 堆叠方式，提供了一种调节 CPL 信号的有效方法。

更新日期：2022-09-09

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