PCFM Lab, GDHPPC Lab, Guangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of OEMT, School of Chemistry, Sun Yat-sen University, 510275, Guangzhou, China.
Instrumental Analysis and Research Center (IARC), Sun Yat-Sen University, 510275, Guangzhou, China.
Nat Commun. 2019 Jul 12;10(1):3074. doi: 10.1038/s41467-019-10575-5.
Flexible hydrogen-bonded organic frameworks (FHOFs) are quite rare but promising for applications in separation, sensing and host-guest chemistry. They are difficult to stabilize, making their constructions a major challenge. Here, a flexible HOF (named 8PN) with permanent porosity has been successfully constructed. Nine single crystals of 8PN with different pore structures are obtained, achieving a large-scale void regulation from 4.4% to 33.2% of total cell volume. In response to external stimuli, multimode reversible structural transformations of 8PN accompanied by changes in luminescence properties have been realized. Furthermore, a series of high-quality co-crystals containing guests of varying shapes, sizes, aggregation states and even amounts are obtained, showing that 8PN can adapt to different guests by regulating the molecular conformations and assembling forms of its building blocks. The unexpected flexibility of 8PN makes it a promising material for enriching the applications of existing porous materials.
柔性氢键有机骨架（FHOFs）较为罕见，但在分离、传感和主客体化学等领域具有广阔的应用前景。它们很难稳定，这使得它们的构建成为一个主要的挑战。在这里，成功构建了一种具有永久孔隙率的柔性 HOF（命名为 8PN）。获得了 9 个具有不同孔结构的 8PN 单晶，实现了从总细胞体积的 4.4%到 33.2%的大规模空隙调节。响应外部刺激，8PN 经历了多模态可逆结构转变，同时发光性质也发生了变化。此外，还获得了一系列高质量的包含不同形状、大小、聚集状态甚至数量的客体的共晶，表明 8PN 可以通过调节其构筑单元的分子构象和组装形式来适应不同的客体。8PN 的意外灵活性使其成为丰富现有多孔材料应用的有前途的材料。
