Data from: Differential metal-binding properties of dynamic acylhydrazone polymers and their sensing applications

As one of common dynamic covalent bonds, acylhydrazone bond plays an important role in developing intelligent responsive materials. In this report, we present acylhydrazone-based dynamic polymers with multi-stimuli responsiveness, particularly metal recognition behaviours and their modulation. A series of polyacylhydrazones with different metal-binding sites were designed and prepared in a modular fashion. Titration of these receptors with a diverse set of metal ions, including Cu2+, Zn2+ and La3+, resulted in unique optical changes, and both the sensitivity and selectivity profiles can be regulated. Moreover, the metal-binding feature was facilely modulated by changing the solvent. The addition of weakly basic anions was employed to further fine-tune the responsiveness of the polymers by taking advantage of the cooperative effect with metal coordination. Finally, the sensitive detection of 6-mercaptopurine and pyrophosphate was achieved to demonstrate the application potential of these systems.酰腙键（acylhydrazone bond）作为一类常见的动态共价键，在智能响应材料的开发中发挥着重要作用。本研究报道了一类基于酰腙键的动态聚合物，其具备多刺激响应特性，尤其聚焦于金属识别行为及其调控机制。研究人员通过模块化方式设计并制备了一系列带有不同金属结合位点的聚酰腙。使用包括Cu²+、Zn²+和La³+在内的多种金属离子对这类受体进行滴定实验，可引发独特的光学变化，且其灵敏度与选择性谱均可被调控。此外，通过改变溶剂即可便捷地调控该聚合物的金属结合特性。研究人员还借助金属配位与弱碱性阴离子的协同效应，通过添加弱碱性阴离子进一步微调了该聚合物的响应性能。最终实现了对6-巯基嘌呤（6-mercaptopurine）与焦磷酸（pyrophosphate）的灵敏检测，以此验证了这类聚合物体系的应用潜力。