Smart materials with a combination of tough solid-like properties, fast self-healing and optical responsiveness are of interests for the development of new soft machines and wearable electronics. In this work, tough physically cross-linked elastomers that show high mechanical strength, intriguing temperature-adaptable self-healing and fluorochromic response properties are designed using aluminum (Al) and fluorescent europium (Eu) ions as cross-linkers. The ionic Al-COOH binding is incorporated to construct the strong polymer network which mainly contributes to the mechanical robustness of the elastomer consisting of two interpenetrated networks. The Eu-iminodiacetate (IDA) coordination is mainly used to build the weaker but more dynamic network which dominate the elasticity, self-healing and luminescence of the elastomer. Moderate Eu³⁺ and Al³⁺ contents give these supramolecular elastomers high toughness. The temperature-sensitive Eu-IDA coordination enables tunable self-healing rate and efficiency along with fast Eu-centered “ON/OFF” switchable red emission. The mechanical, self-healing and luminescence properties of these elastomers can be adjusted by tuning the ratio of the two types of metal ions. This elastomer is potentially applicable for biosensors, wearable optoelectronics and anticounterfeiting materials.

结合了坚硬的固体特性，快速的自愈性和光学响应性的智能材料对于新型软机和可穿戴电子设备的开发很感兴趣。在这项工作中，使用铝（Al）和荧光euro（Eu）离子作为交联剂，设计了具有高机械强度，耐高温的自修复和荧光致变色响应特性的坚韧的物理交联弹性体。结合离子型Al-COOH结合可构建牢固的聚合物网络，这主要有助于由两个互穿网络组成的弹性体的机械强度。Eu-亚氨基二乙酸酯（IDA）配位主要用于建立较弱但更动态的网络，该网络支配着弹性体的弹性，自愈性和发光性。中度欧盟³⁺和Al ³⁺含量赋予这些超分子弹性体高韧性。对温度敏感的Eu-IDA配合可实现自愈率和效率的可调，以及以Eu为中心的快速“开/关”可切换红色发射。这些弹性体的机械，自愈和发光性能可以通过调节两种金属离子的比例来调节。该弹性体可能适用于生物传感器，可穿戴光电和防伪材料。