采用 Co₂ 和 Co₃ 混合团簇二级构筑单元的方法构建具有永久孔隙率的三维金属有机骨架。
Co₂ and Co₃ Mixed Cluster Secondary Building Unit Approach toward a Three-Dimensional Metal-Organic Framework with Permanent Porosity.
机构信息
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
出版信息
Molecules. 2018 Mar 25;23(4):755. doi: 10.3390/molecules23040755.
Large and permanent porosity is the primary concern when designing metal-organic frameworks (MOFs) for specific applications, such as catalysis and drug delivery. In this article, we report a MOF Co(BTB)₆(NO₃)₄(DEF)₂(H₂O) (, H₃BTB = 1,3,5-tris(4-carboxyphenyl)benzene; DEF = ,-diethylformamide) via a mixed cluster secondary building unit (SBU) approach. MOF is sustained by a rare combination of a linear trinuclear Co₃ and two types of dinuclear Co₂ SBUs in a 1:2:2 ratio. These SBUs are bridged by BTB ligands to yield a three-dimensional (3D) non-interpenetrated MOF as a result of the less effective packing due to the geometrically contrasting SBUs. The guest-free framework of has an estimated density of 0.469 g cm and exhibits a potential solvent accessible void of 69.6% of the total cell volume. The activated sample of exhibits an estimated Brunauer-Emmett-Teller (BET) surface area of 155 m² g and is capable of CO₂ uptake of 58.61 cm³ g (2.63 mmol g, 11.6 wt % at standard temperature and pressure) in a reversible manner at 195 K, showcasing its permanent porosity.
当设计用于特定应用的金属-有机骨架（MOF）时，如催化和药物输送，大而永久的孔隙率是主要关注点。在本文中，我们报道了一种 MOF Co（BTB）₆（NO₃）₄（DEF）₂（H₂O）（，H₃BTB = 1,3,5-三（4-羧基苯基）苯；DEF = ，-二乙酰胺），通过混合簇次级结构单元（SBU）方法。MOF 由线性三核 Co₃和两种类型的双核 Co₂ SBU 以 1:2:2 的比例支撑，这些 SBU 由 BTB 配体桥接，由于 SBU 的几何对比，导致产生了三维（3D）非穿插的 MOF。由于几何形状对比的 SBU 导致有效堆积较少，因此无客体的 骨架的估计密度为 0.469 g cm，表现出潜在的溶剂可及空隙为总细胞体积的 69.6%。活化后的 样品具有估计的 Brunauer-Emmett-Teller（BET）表面积为 155 m² g，并且能够以可逆方式在 195 K 下以 58.61 cm³ g（2.63 mmol g，标准温度和压力下的 11.6 wt %）的速率吸收 CO₂，展示了其永久孔隙率。
Zotero 插件