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
• 来源期刊: 结构化学
• 年，卷（期）: 2022,（2）
• 所属期刊栏目: coordination chemistry
• 页码范围: 49-56
• 页数: 8页
• 语种: 英文
• DOI: 10.14102/j.cnki.0254-5861.2011-3264

摘要

Three zinc(Ⅱ) metal-organic frameworks (xF-MAC-3) have been synthesized by using Zn(Ⅱ) salts,3,5-dimethyl-lH-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 xF-MAC-3,which can not only enlarge the torsion angle φ of carboxylate ligands but also elevate the space group of structures.Besides,the CO2-273 K uptake increased from 23.21 cm3·g-1 (MAC-3) to 36.13 cm3·g-1 (4F-MAC-3) and H2-77 K uptake increased from 24.33 cm3·g-1 (MAC-3) to 59.79 cm3·g-1(4F-MAC-3),which means fluorination can enhance the gas adsorption uptake of xF-MAC-3 analogues.Furthermore,the results of fluorination in xF-MAC-3 analogues offer a potential way to study the ligand pre-functionalization effect on the structures and properties of MOFs analogues.