Although supramolecular one‐dimensional (1D) and two‐dimensional (2D) structures with various unique properties have been extensively studied, the reversible switching between tubules and sheets via lateral association remains challenging. Here, we report the unique structures of a supramolecular tubular bamboo culm in which the hollow‐tubular interior is separated, at intervals, by nodes per 1.3 nm. Interestingly, the discrete tubules are able to hierarchically assemble into a flat sheet in response to an aromatic guest. The addition of trans‐azobenzene, as a guest, enables the tubules to form a hierarchical sheet assembly via the lateral interaction. The hierarchical sheet structures are disassembled into their constituent tubules upon UV irradiation due to trans‐cis isomerization. The recovery from cis‐azobenzene to trans‐form induces repeatedly the hierarchical sheet assembly, indicative of a reversible switching behavior between tubules and sheets triggered by an external stimulus.

中文翻译：

---

跷跷板形两亲物的超分子小管及其分层演化为片状。

尽管已经对具有各种独特性质的超分子一维（1D）和二维（2D）结构进行了广泛研究，但通过横向缔合在小管和床单之间可逆转换仍然具有挑战性。在这里，我们报告了超分子管状竹节的独特结构，其中中空管状内部每隔1.3 nm被节点隔开。有趣的是，离散的小管能够响应于芳族客体而分层地组装成平板。作为客体添加反式偶氮苯，可使小管通过侧向相互作用形成分层的片状组件。分层片结构被在UV照射由于分解成它们的组成小管的反式-顺式异构化。从回收的顺式-azobenzene到反式-形式诱导反复分层片组件，指示由外部刺激触发的小管和片材之间的可逆切换行为的。