Noro Shin-Ichiro, Meng Yu, Suzuki Kazushige, Sugiura Minori, Hijikata Yuh, Pirillo Jenny, Zheng Xin, Takahashi Kiyonori, Nakamura Takayoshi
Faculty of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Japan.
Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0810, Japan.
Inorg Chem. 2021 Apr 5;60(7):4531-4538. doi: 10.1021/acs.inorgchem.0c03420. Epub 2021 Mar 11.
Flexible porous coordination polymers (PCPs)/metal-organic frameworks are unique materials that have potential applications as components of highly efficient separation, sensor, and actuator systems. In general, the structures of flexible PCPs drastically change upon guest loading. In this investigation, we uncovered the rare one-dimensional PCP [Cu(bza)(2-apyr)] (; bza = benzoate and 2-apyr = 2-aminopyrimidine), which exhibits a unique type of flexibility involving temporary pore opening. Single-crystal X-ray diffraction analysis revealed that desolvated and ethyl acetate (AcOEt)-loaded (·AcOEt) and CO-loaded (·CO) have isolated pores. In the case of , the pore structure prevents guest penetration. In addition, the isolated pore structures of ·AcOEt and ·CO block guest release. However, participates in reversible adsorption/desorption of AcOEt and CO because pore opening occurs temporarily. The CO adsorption/desorption isotherms of are type I and dissimilar to those observed in traditional flexible PCPs with adsorption/desorption hysteresis. The lesser conventional flexibility displayed by could offer new insight into the design of flexible PCPs.
柔性多孔配位聚合物（PCPs）/金属有机框架是一类独特的材料，在高效分离、传感和驱动系统组件方面具有潜在应用。一般来说，柔性PCPs的结构在客体负载时会发生显著变化。在本研究中，我们发现了罕见的一维PCP [Cu(bza)(2-apyr)] （；bza = 苯甲酸酯，2-apyr = 2-氨基嘧啶），它表现出一种独特的柔性，涉及临时的孔开放。单晶X射线衍射分析表明，脱溶剂的 以及负载乙酸乙酯（AcOEt）的（·AcOEt）和负载CO的（·CO） 都具有孤立的孔。在 的情况下，孔结构阻止客体渗透。此外，·AcOEt和·CO的孤立孔结构阻止客体释放。然而， 参与了AcOEt和CO的可逆吸附/解吸，因为孔会临时开放。 的CO吸附/解吸等温线属于I型，与传统具有吸附/解吸滞后的柔性PCPs中观察到的等温线不同。 表现出的较小的传统柔性可为柔性PCPs的设计提供新的见解。
