作者:Zhang, Yunjia、Liang, Rongran、Atterberry, Benjamin A.、Li, Fangzhou、Staples, Richard J.、Zhang, Jian、Samanta, Jayanta、Rossini, Aaron J.、Ke, Chenfeng
DOI:10.1021/jacs.4c04245
日期:——
high crystallinity, and extraordinary framework dynamics. For instance, HCOF-104 crystals featuring a pore diameter of 13.6 Å expanded in DMF to 300 ± 10% of their original lengths within just 1 min. This expansion allows the HCOFs to adsorb guest molecules that are significantly larger than the pore sizes of their crystalline states. Through methanol-induced contraction, these large guests were encapsulated
表现出大框架动力学的多孔有机材料为吸附和分离提供了新的途径,其容量和选择性超出了尺寸筛分限制,这归因于它们的客体响应吸附行为。多孔氢键交联有机骨架( HCOF )因其灵活的共价交联所促进的客体触发膨胀和收缩的卓越能力而引人注目。然而, HCOF的空隙仍然有限,这限制了框架动态的程度。在这项工作中,我们合成了一系列H2COF ,其特征是溶剂诱导的前所未有的尺寸膨胀能力。这些H2COF是通过等网状共结晶两组互补的氢键结构单元来生成多孔分子晶体,并通过硫醇-烯/炔单晶到单晶的转变进行交联。生成的H2COF表现出增强的化学耐久性、高结晶度和非凡的骨架动力学。例如,孔径为 13.6 Å 的HCOF -104 晶体在 DMF 中仅需 1 分钟即可膨胀至原始长度的 300 ± 10%。这种膨胀使得H2COF能够吸附明显大于其晶态孔径的客体分子。通过甲醇诱导的收缩,这些大客体被封装在快速收缩的H2COF中