Sun Xiaodong, Yao Shuo, Li Guanghua, Zhang Lirong, Huo Qisheng, Liu Yunling
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University , Changchun 130012, People's Republic of China.
Inorg Chem. 2017 Jun 5;56(11):6645-6651. doi: 10.1021/acs.inorgchem.7b00744. Epub 2017 May 19.
A ZnO clusters based flexible doubly interpenetrated metal-organic framework [(ZnO)(DCPB)DMF]·2DMF·8HO (JLU-Liu33, HDCPB = 1,3-di(4-carboxyphenyl)benzene, DMF = N,N-dimethylformamide) with pcu topology has been solvothermally synthesized. Because of its flexible structure, JLU-Liu33 exhibits a breathing behavior upon N and CO adsorption at low temperature, and CH and CH adsorption at 273 and 298 K. Furthermore, by adopting the direct synthesis method, two isomorphic compounds-JLU-Liu33L and JLU-Liu33H-have been obtained by partial substituting Zn with different amounts of Co into the JLU-Liu33 framework. The gas adsorption study of Co-doped materials reveals that the gate opening effect of JLU-Liu33 can be modulated by introducing different contents of Co into ZnO clusters. Meanwhile, with the increasing amount of Co, the adsorption amount and isosteric enthalpy values for CO have been improved. It is worth mentioning that JLU-Liu33H exhibits commendable selectivity for CO over CH which may be a good candidate for industrial gas purification and air separation applications.
一种基于氧化锌簇的具有pcu拓扑结构的柔性双互穿金属有机框架化合物[(ZnO)(DCPB)DMF]·2DMF·8H₂O（JLU-Liu33，HDCPB = 1,3-二(4-羧基苯基)苯，DMF = N,N-二甲基甲酰胺）已通过溶剂热法合成。由于其柔性结构，JLU-Liu33在低温下对N₂和CO₂吸附以及在273 K和298 K下对CH₄和C₂H₄吸附时表现出呼吸行为。此外，通过采用直接合成法，通过将不同量的Co部分取代JLU-Liu33框架中的Zn，获得了两种同构化合物——JLU-Liu33L和JLU-Liu33H。对Co掺杂材料的气体吸附研究表明，通过在氧化锌簇中引入不同含量的Co，可以调节JLU-Liu33的门控效应。同时，随着Co含量的增加，CO₂的吸附量和等量焓值得到了提高。值得一提的是，JLU-Liu33H对CO₂相对于CH₄表现出良好的选择性，这可能是工业气体净化和空气分离应用的良好候选材料。
