Liu Rongjuan, Feng Zhenyu, Yan Xiangyu, Lv Yujia, Wei Jingjing, Hao Jingcheng, Yang Zhijie
Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China.
J Am Chem Soc. 2023 Aug 9;145(31):17274-17283. doi: 10.1021/jacs.3c04615. Epub 2023 Jul 26.
Manipulation of the chirality at all scales has a cross-disciplinary importance and may address key challenges at the heart of physical sciences. One critical question in this field is how the chirality of one entity can be transferred to the asymmetry of another entity. Here, we find that small molecules play a crucial role in the chirality transfer from chiral organic molecules to CdSe/CdS nanorods, where the handedness of the nanorod assemblies either agrees or disagrees with that of the molecular assemblies, leading to the positive or inverse chirality transfer. The assembling mode of nanorods on the molecular assemblies, where the nanorods are either lying or standing, is closely associated with the handedness of the nanorod assemblies, resulting in opposite chirality. Furthermore, we have found that circularly polarized emission from chiral assemblies of nanorods is dependent on molecular additives. The promoted luminescence dissymmetry factor () of the nanocomposites with a high value of ∼0.3 could be attained under optimal conditions.
在所有尺度上对手性进行操控具有跨学科的重要性，并且可能解决物理科学核心的关键挑战。该领域的一个关键问题是一个实体的手性如何转移到另一个实体的不对称性上。在这里，我们发现小分子在从手性有机分子到CdSe/CdS纳米棒的手性转移中起着关键作用，其中纳米棒聚集体的手性与分子聚集体的手性一致或不一致，导致正向或反向手性转移。纳米棒在分子聚集体上的组装模式，即纳米棒是平躺还是直立，与纳米棒聚集体的手性密切相关，从而导致相反的手性。此外，我们发现纳米棒手性聚集体的圆偏振发射取决于分子添加剂。在最佳条件下，可以获得具有约0.3的高值的纳米复合材料的发光不对称因子（）。
