Gu Yifan, Zheng Jia-Jia, Otake Ken-Ichi, Sugimoto Kunihisa, Hosono Nobuhiko, Sakaki Shigeyoshi, Li Fengting, Kitagawa Susumu
Institute for Integrated Cell-Material Sciences, Kyoto University Institute for Advanced Study, Kyoto University, Yoshida Ushinomiya-cho, Sakyo-ku, Kyoto, 606-8501, Japan.
College of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Siping Rd 1239, 200092, Shanghai, China.
Angew Chem Int Ed Engl. 2020 Sep 1;59(36):15517-15521. doi: 10.1002/anie.202003186. Epub 2020 May 4.
To achieve unique molecular-recognition patterns, a rational control of the flexibility of porous coordination polymers (PCPs) is highly sought, but it remains elusive. From a thermodynamic perspective, the competitive relationship between the structural deformation energy (E ) of soft PCPs and the guest interaction is key for selective a guest-triggered structural-transformation behavior. Therefore, it is vital to investigate and control E to regulate this competition for flexibility control. Driven by these theoretical insights, we demonstrate an E -modulation strategy via encoding inter-framework hydrogen bonds into a soft PCP with an interpenetrated structure. As a proof of this concept, the enhanced E of PCP enables a selective gate-opening behavior toward CHCl over CH Cl by changing the adsorption-energy landscape of the compounds. This study provides a new direction for the design of functional soft porous materials.
为了实现独特的分子识别模式，人们迫切需要对多孔配位聚合物（PCP）的柔韧性进行合理控制，但这仍然难以实现。从热力学角度来看，软质PCP的结构变形能（E）与客体相互作用之间的竞争关系是实现客体触发的选择性结构转变行为的关键。因此，研究和控制E以调节这种竞争对于柔韧性控制至关重要。受这些理论见解的驱动，我们展示了一种通过将框架间氢键编码到具有互穿结构的软质PCP中来调节E的策略。作为这一概念的证明，PCP增强的E通过改变化合物的吸附能态势，实现了对CHCl相对于CH Cl的选择性门控行为。这项研究为功能性软质多孔材料的设计提供了新方向。
