Chen Hongtai, Fan Liming, Zhang Xiutang, Ma Lufang
Department of Chemistry, College of Science, North University of China, Taiyuan 030051, People's Republic of China.
College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China.
ACS Appl Mater Interfaces. 2020 Jun 17;12(24):27803-27811. doi: 10.1021/acsami.0c07061. Epub 2020 Jun 5.
The exquisite combination of independent 3p [In(CO)] units and 4f [Tb(CO)] clusters in the presence of the designed hexatopic 2,4,6-tri(2,4-dicarboxyphenyl)pyridine ligand engenders one peculiar nanocaged In(III){Tb(III)}-organic framework: ({(MeNH)[InTb(HTDP)]·3DMF·3HO}, designated as ), which features dual types of lotus-shaped channels along the [100] and [110] axes with related node windows of 5.3 × 6.8 and 12.1 × 9.2 Å, respectively. To the best of our knowledge, except several coexisted 3p-4f In/Ln clusters of {InLn}- and {InLn}-based metal-organic frameworks (MOFs), is one novel type of In/Ln heterometallic framework. In addition, its topology was an unprecedented 3D net with a Schläfli symbol of {4.6}{4.6}{4.6.8}. Moreover, activated is proved to be one efficient adsorbent for CO and one recycled cycloaddition catalyst for the transformation of epoxides into related carbonates with high yields under mild conditions. Furthermore, the excellent reversible sorption performance for I in the volatilization phase or in cyclohexane solution with a maximum adsorption capacity of 609.1 mg/g (3.75 iodine molecules per unit cell) makes a promising adsorbent for radioactive products of I and I in the field of nuclear industry. This study provides one synthetic strategy that the original nature of MOFs could be enhanced by introducing some specific function-prompted inorganic subunits with the aid of predesigned supporting ligands.
在设计的六齿2,4,6-三（2,4-二羧基苯基）吡啶配体存在下，独立的3p [In(CO)]单元与4f [Tb(CO)]簇的精妙组合产生了一种独特的纳米笼状In(III){Tb(III)}-有机框架：({(MeNH)[InTb(HTDP)]·3DMF·3HO}，命名为 ），其沿[100]和[110]轴具有两种类型的莲花形通道，相关的节点窗口分别为5.3×6.8 Å和12.1×9.2 Å。据我们所知，除了几种共存的基于{InLn}-和{InLn}-的金属有机框架（MOF）的3p-4f In/Ln簇外， 是一种新型的In/Ln异金属框架。此外，其拓扑结构是一种前所未有的3D 网络，施莱夫利符号为{4.6}{4.6}{4.6.8}。此外，活化后的 被证明是一种高效的CO吸附剂，也是一种可循环的环加成催化剂，可在温和条件下将环氧化物高产率转化为相关的碳酸酯。此外， 在挥发阶段或环己烷溶液中对I具有优异的可逆吸附性能，最大吸附容量为609.1 mg/g（每晶胞3.75个碘分子），这使得 成为核工业领域中I和I放射性产物的有前景的吸附剂。本研究提供了一种合成策略，即借助预先设计的支撑配体引入一些具有特定功能促进作用的无机亚基，可以增强MOF的原始性质。
