Zhao Xiang, Shimazu Matthew S, Chen Xitong, Bu Xianhui, Feng Pingyun
Department of Chemistry, University of California, Riverside, CA, 92521, USA.
Department of Chemistry and Biochemistry, California State University Long Beach, 1250 Bellflower Boulevard, Long Beach, CA, 90840, USA.
Angew Chem Int Ed Engl. 2018 May 22;57(21):6208-6211. doi: 10.1002/anie.201802267. Epub 2018 Apr 25.
In porous materials, metal sites with coordinate solvents offer opportunities for many applications, especially those promoted by host-guest chemistry, but such sites are especially hard to create for Li-based materials, because unlike transition metals, lithium does not usually possess a high-enough coordination number for both framework construction and guest binding. This challenge is addressed by mimicking the functional group ratio and metal-to-ligand charge ratio in MOF-74. A family of rod-packing lithium-organic frameworks (CPM-47, CPM-48, and CPM-49) were obtained. These materials exhibit an extremely high density of guest-binding lithium sites. Also unusual is the homo-helical rod-packing in the CPM series, as compared to the hetero-helical rod packing by helices of opposite handedness in MOF-74. This work demonstrates new chemical and structural possibilities in developing a record-setting high density of guest-binding metal sites in inorganic-organic porous materials.
在多孔材料中，带有配位溶剂的金属位点为许多应用提供了机会，尤其是那些由主客体化学促进的应用，但对于锂基材料而言，此类位点特别难以创建，因为与过渡金属不同，锂通常没有足够高的配位数来同时构建骨架和结合客体。通过模拟MOF - 74中的官能团比例和金属与配体的电荷比，解决了这一挑战。获得了一族棒状堆积的锂有机框架材料（CPM - 47、CPM - 48和CPM - 49）。这些材料表现出极高密度的客体结合锂位点。与MOF - 74中由相反手性螺旋形成的杂螺旋棒状堆积相比，CPM系列中的同螺旋棒状堆积也很不寻常。这项工作展示了在无机 - 有机多孔材料中开发创纪录的高密度客体结合金属位点方面新的化学和结构可能性。
