Engineering ideal functional coordination polymers (CPs) via post-synthetic modification has emerged as a powerful synthetic strategy to achieve desirable functionalities and superior properties. In this work, we report a versatile ligand-strain modulation strategy that harnesses ligand strain to modify the skeleton conformation of CPs by metal node exchange. A one-dimensional (1D) crystalline CP, Ag(I)-L, featuring a curved ligand geometry, is prepared through a direct synthesis route. Exploiting polarization differences between different metal ions, we successfully regulate the ligand strain, enabling a metal node exchange process that yields another crystalline CP, Cu(I)-L, exhibiting a distinct linear parallel ligand orientation. Significantly, the complete exchange of AgNO₃ to CuI is achieved via solid–liquid contact, while only partial exchange occurs under grinding. This ligand-strain engineering strategy will open new avenues in constructing functional systems and supramolecular materials through dynamic metal exchange and ligand-strain control.

中文翻译：

---

一维结晶配位聚合物的金属节点交换驱动的配体-应变调制策略


通过合成后改性设计理想的功能配位聚合物 （CP） 已成为一种强大的合成策略，可实现理想的官能团和卓越性能。在这项工作中，我们报道了一种通用的配体-应变调制策略，该策略利用配体应变通过金属节点交换来修饰 CPs 的骨架构象。通过直接合成途径制备一维 （1D） 结晶 CP Ag（I）-L，具有弯曲的配体几何形状。利用不同金属离子之间的极化差异，我们成功地调节配体应变，实现了金属节点交换过程，产生了另一种结晶 CP Cu（I）-L，表现出独特的线性平行配体取向。值得注意的是，AgNO₃ 与 CuI 的完全交换是通过固液接触实现的，而在研磨过程中仅发生部分交换。这种配体-应变工程策略将通过动态金属交换和配体-应变控制为构建功能系统和超分子材料开辟新途径。