Stimuli-responsive hydrogels have been well known as a kind of promising functional material. Among them, intelligent supramolecular hydrogels constructed by covalent and non-covalent bonds have received increasing attention and been extensively researched. In this work we demonstrate a class of supramolecular hydrogels formed via host-guest interactions between coumarin and γ-cyclodextrin. Its stiffness can be modulated by photo-switching the weak physical crosslinking points to strong chemical crosslinking points. It is a simple and effective way to construct a dual-modality supramolecular hydrogel. Owing to the dynamic and reversible nature, the supramolecular hydrogels exhibit a bright future for the usage in self-healing and shape memory materials.

刺激响应水凝胶已被公认为是一种有前途的功能材料。其中，由共价键和非共价键构成的智能超分子水凝胶受到越来越多的关注，并得到了广泛的研究。在这项工作中，我们证明了香豆素和γ-环糊精之间通过客体-客体相互作用形成的一类超分子水凝胶。可以通过将弱的物理交联点光转换为强的化学交联点来调节其刚度。这是构建双峰型超分子水凝胶的一种简单有效的方法。由于具有动态性和可逆性，超分子水凝胶在自愈和形状记忆材料中的应用前景广阔。