A metal–ligand crosslinked internal self‐healing polyurethane is developed using low‐cost and commercially available compounds. The mechanical, photoluminescent, and self‐healing properties can be governed by incorporating multiple metal–ligand crosslinks with weak and strong coordination bonds and varying the metal ion. In‐situ attenuated total reflectance Fourier transform infrared spectroscopy reveals that the metal–ligand bond is cleaved during the damage process while metal ion is still coordinated with the ligand by stronger metal–pyridyl interaction. The multiple metal–ligand coordination facilitates the crosslinks to be fully reformed during the repairing process, leading to the superior self‐healing property.

中文翻译：

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包含多个金属-配体键的自修复聚氨酯的简便策略

一种金属-配体交联的内部自修复聚氨酯是使用低成本和可商购的化合物开发的。机械，光致发光和自愈性能可以通过掺入多个具有弱和强配位键的金属-配体交联键并改变金属离子来控制。原位衰减全反射傅里叶变换红外光谱表明，在损伤过程中金属-配体键断裂，而金属离子仍通过较强的金属-吡啶基相互作用与配体配位。多种金属-配体配位有助于在修复过程中完全重整交联键，从而具有出色的自我修复性能。