Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Institute for Advanced Study, and Department of Chemical and Biological Engineering , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , 999077 , Hong Kong, China.
College of Chemistry and Environmental Engineering , Shenzhen University , Shenzhen 518060 , China.
ACS Nano. 2019 Mar 26;13(3):3618-3628. doi: 10.1021/acsnano.9b00218. Epub 2019 Mar 7.
Constructing artificial helical structures through hierarchical self-assembly and exploring the underlying mechanism are important, and they help gain insight from the structures, processes, and functions from the biological helices and facilitate the development of material science and nanotechnology. Herein, the two enantiomers of chiral Au(I) complexes ( S)-1 and ( R)-1 were synthesized, and they exhibited impressive spontaneous hierarchical self-assembly transitions from vesicles to helical fibers. An impressive chirality inversion and amplification was accompanied by the assembly transition, as elucidated by the results of in situ and time-dependent circular dichroism spectroscopy and scanning electron microscope imaging. The two enantiomers could serve as ideal chiral templates to co-assemble with other achiral luminogens to efficiently induce the resulting co-assembly systems to show circularly polarized luminescence (CPL). Our work has provided a simple but efficient way to explore the sophisticated self-assembly process and presented a facile and effective strategy to fabricate architectures with CPL properties.
通过分级自组装构建人工螺旋结构并探索其内在机制非常重要，这有助于我们从生物螺旋的结构、过程和功能中获得深入的认识，并促进材料科学和纳米技术的发展。本文合成了手性金（I）配合物（S）-1 和（R）-1 的两种对映异构体，它们表现出令人印象深刻的自发分级自组装转变，从囊泡到螺旋纤维。通过原位和时间依赖性圆二色光谱和扫描电子显微镜成像的结果阐明了组装转变伴随着令人印象深刻的手性反转和放大。这两种对映异构体可以作为理想的手性模板，与其他非手性发光体共组装，有效地诱导所得共组装体系显示圆偏振发光（CPL）。我们的工作为探索复杂的自组装过程提供了一种简单而有效的方法，并提出了一种制造具有 CPL 性能的结构的简便有效策略。
