Zhao Junying, Li Qian, Zhu Xin-Cheng, Li Jia, Wu Dapeng
State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315211, China.
Institute of Industrial Catalysis, College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou, Zhejiang 310032, China.
Inorg Chem. 2020 Oct 5;59(19):14424-14431. doi: 10.1021/acs.inorgchem.0c02214. Epub 2020 Sep 18.
A novel noninterpenetrated tetranuclear cobalt(II)-based metal-organic framework, (NH)·[Co(μ-OH)(ina)(pip)]·4EtOH·HO (simplified as ·S), constructed by mix linkers was synthesized by a hydrothermal method. Interestingly, the presence of a hydrophobic benzene ring in the organic linker makes ·S exhibit high stability in high temperature and even in aqueous solution over a wide pH range of about 4-13. Magnetic studies showed that the tetranuclear cobalt(II) units in ·S show dominant antiferromangetic properties. However, in the absence of Lewis basic functional sites and open metal sites in the material, still displays high CH/CO and CH/CH selectivity in ideal adsorbed solution theory calculations and dynamic breakthrough experiments. Moreover, density functional theory calculations were performed to identify the adsorption characteristics of different gas molecules.
通过水热法合成了一种新型的非互穿四核钴（II）基金属有机框架（NH）·[Co(μ-OH)(ina)(pip)]·4EtOH·HO（简化为·S），它由混合配体构建而成。有趣的是，有机配体中疏水苯环的存在使·S在高温下甚至在约4 - 13的宽pH范围内的水溶液中都表现出高稳定性。磁性研究表明，·S中的四核钴（II）单元表现出主要的反铁磁性质。然而，由于该材料中不存在路易斯碱性官能团和开放金属位点，在理想吸附溶液理论计算和动态突破实验中仍显示出高的CH/CO和CH/CH选择性。此外，还进行了密度泛函理论计算以确定不同气体分子的吸附特性。
