The development of mechanochemistry substantially expands the traditional synthetic realm at the molecular level. Here, we extend the concept of mechanochemistry from atomic/molecular solids to the nanoparticle solids, and show how the macroscopic grinding is being capable of generating chirality in self-assembled nanorod (NR) assemblies. Specifically, the weak van der Waals interaction is dominated in self-assembled NR assemblies when their surface is coated with aliphatic chains, which can be overwhelmed by a press-and-rotate mechanic force macroscopically. The chiral sign of the NR assemblies can be well-controlled by the rotating directions, where the clockwise and counter-clockwise rotation leads to the positive and negative Cotton effect in circular dichroism and circularly polarized luminescence spectra, respectively. Importantly, we show that the present approach can be applied to NRs of diverse inorganic materials, including CdSe, CdSe/CdS, and TiO₂. Equally important, the as-prepared chiral NR assemblies could be served as porous yet robust chiral substrates, which enable to host other molecular materials and induce the chirality transfer from substrate to the molecular system.

机械化学的发展极大地扩展了分子水平上的传统合成领域。在这里，我们将机械化学的概念从原子/分子固体扩展到纳米粒子固体，并展示了宏观研磨如何能够在自组装纳米棒（NR）组件中产生手性。具体来说，当自组装 NR 组件表面涂有脂肪链时，弱范德华相互作用在自组装 NR 组件中占主导地位，宏观上，脂肪链可能会被压力和旋转机械力所淹没。 NR组件的手性符号可以通过旋转方向很好地控制，其中顺时针和逆时针旋转分别导致圆二色性和圆偏振发光光谱中的正和负Cotton效应。重要的是，我们表明本方法可以应用于多种无机材料的 NR，包括 CdSe、CdSe/CdS 和 TiO ₂ 。同样重要的是，所制备的手性 NR 组装体可以作为多孔但坚固的手性基底，能够承载其他分子材料并诱导从基底到分子系统的手性转移。