Effect of Fluorination on the Crystal Structure,Stability and Gas Adsorption Property in Zinc (Ⅱ) Metal-organic Frameworks  

作　　者：ZHANG Xin CHEN Zhen-Xia YANG Yong-Tai DENG Ming-Li WENG Lin-Hong 张鑫;陈珍霞;杨永泰;邓名莉;翁林红(Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Department of Chemistry,Fudan University,Shanghai 200433,China)

机构地区：[1]Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Department of Chemistry,Fudan University,Shanghai 200433,China

出　　处：《Chinese Journal of Structural Chemistry》2022年第2期49-56,I0008,共9页结构化学（英文）

基　　金：supported by the NSFC (No. 21971045);Natural Science Foundation of Shanghai (No. 18ZR1402900);the National Key Technologies R&D Program of China (2017YFA0205103);Shanghai Leading Academic Discipline Project (B108)。

摘　　要：Three zinc(Ⅱ) metal-organic frameworks (x F-MAC-3) have been synthesized by using Zn(Ⅱ) salts,3,5-dimethyl-1H-1,2,4-triazole (Hdmtrz) and different fluorination degree carboxylate ligands,which are analogic structures and can be described as (6,6)-connected pcu-b net.We find that the fluorine atoms have structural regulation effect on x F-MAC-3,which can not only enlarge the torsion angle φ of carboxylate ligands but also elevate the space group of structures.Besides,the CO_(2)-273 K uptake increased from 23.21 cm^(3)·g^(-1) (MAC-3) to36.13 cm^(3)·g^(-1) (4F-MAC-3) and H_(2)-77 K uptake increased from 24.33 cm^(3)·g^(-1) (MAC-3) to 59.79 cm^(3)·g^(-1)(4F-MAC-3),which means fluorination can enhance the gas adsorption uptake of x F-MAC-3 analogues.Furthermore,the results of fluorination in x F-MAC-3 analogues offer a potential way to study the ligand pre-functionalization effect on the structures and properties of MOFs analogues.

关 键 词：metal-organic frameworks fluorine functionalization X-ray crystallography gas adsorption 

分 类 号：O62[理学—有机化学]