Mechanically interlocked networks are cross-linked by mechanically interlocked polymers, whose dynamic mechanical bonding provides a solid foundation for their application in materials science. Noncovalent interactions are indispensable linkages for building supramolecular polymers but exhibit low mechanical strength. Therefore, in this paper, we have designed and synthesized a class of mechanically interlocked supramolecular polymer networks (MISPNs) with shape memory behavior, using which we have prepared gel materials with solvent-responsive shape memory behavior and reversible light transmittance changes in response to noncovalent interactions. It was found that the naphthalene-functionalized pillar[5]arene (compound 3) served as the backbone of the MISPNs, and its mechanically interlocked topology not only ensured good stability of the polymer networks but also endowed the shape memory properties of the shape memory materials. Meanwhile, the abundant oxygen (O) and sulfur (S) atoms in the polymer networks form multiple hydrogen bonds with the H atoms in the protonated solvent, which contributes to the shape memory behavior and the reversible light transmission behavior of the gel materials. The herein reported MISPNs gel materials offer a possible strategy for the development of multifunctional materials with good mechanical properties, sensitive stimulus response properties, and excellent smart information protection properties.

中文翻译：

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由柱[5]基芳烃的机械互锁聚合物网络构建的形状记忆超分子聚合物凝胶


机械互锁网络由机械互锁聚合物交联，其动态机械键合为其在材料科学中的应用奠定了坚实的基础。非共价相互作用是构建超分子聚合物不可或缺的键，但表现出较低的机械强度。因此，在本文中，我们设计并合成了一类具有形状记忆行为的机械互锁超分子聚合物网络 （MISPN），我们用它制备了具有溶剂响应形状记忆行为和响应非共价相互作用的可逆透光率变化的凝胶材料。研究发现，萘官能化柱[5]芳烃（化合物 3）是 MISPN 的主链，其机械互锁拓扑结构不仅保证了聚合物网络的良好稳定性，还赋予了形状记忆材料的形状记忆特性。同时，聚合物网络中丰富的氧 （O） 和硫 （S） 原子与质子化溶剂中的 H 原子形成多个氢键，这有助于凝胶材料的形状记忆行为和可逆的光传输行为。本文报道的 MISPNs 凝胶材料为开发具有良好机械性能、灵敏刺激响应性能和优异智能信息保护性能的多功能材料提供了一种可能的策略。