Chiral noble metal nanoparticles has recently gained great interest due to their potential applications including ultrasensitive chiral recognition and asymmetric synthesis. We anticipate that they could be utilized to induce asymmetric photo-polymerization reactions with high enantioselectivity and reactivity. Here, we report such a system. By employing silver nanoparticles modified with cysteine as the chiral inducer, polydiacetylene (PDA) with high chiral asymmetry was obtained from achiral diacetylene monomers triggered with unpolarized UV light. Furthermore, the helical sense of chirality can be controlled by varying the wavelength of UV irradiation. This enables a feasible and economical method to fabricate programmable 2D patterns of chiral PDA with tailored chirality distributions, such as smooth gradients in chirality and micropatterns with tailorable circularly polarized luminescence. Our finding not only opens a pathway for producing programmable chiroptical micropatterns, but also is highly valuable for deeper understanding of symmetry breaking in enantioselective photochemical reactions.

由于手性贵金属纳米颗粒的潜在应用包括超灵敏手性识别和不对称合成，近来已引起人们极大的兴趣。我们预期它们可以用于诱导具有高对映选择性和反应性的不对称光聚合反应。在这里，我们报告这样的系统。通过使用半胱氨酸修饰的银纳米颗粒作为手性诱导剂，从非偏振紫外光触发的非手性二乙炔单体获得具有高手性不对称性的聚二乙炔（PDA）。此外，可以通过改变UV照射的波长来控制手性的螺旋感。这为制造具有定制手性分布的手性PDA的可编程2D模式提供了一种可行且经济的方法，例如手性的平滑渐变和具有可调整的圆偏振发光的微图案。我们的发现不仅为产生可编程的手性微图案开辟了道路，而且对于深入理解对映选择性光化学反应中的对称性破坏也具有重要价值。