Xiong Xiao-Hong, Song Liang, Tan Li-Lin, Liang Jia-Liang, Qin Zi-Ye, Wei Zhang-Wen, Li Mian, Huang Xiao-Chun
Department of Chemistry and Chemical Engineering, Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou 515063, China.
MOE Laboratory of Bioinorganic and Synthetic Chemistry, GBRCE for Functional Molecular Engineering, LIFM, IGCME, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China.
Inorg Chem. 2024 Sep 9;63(36):16733-16739. doi: 10.1021/acs.inorgchem.4c02167. Epub 2024 Aug 26.
Sulfur hexafluoride (SF) is widely used as an insulating gas, being an etchant and contrast agent in the electrical, semiconductor, and medical industries. However, due to its long lifetime and high global warming potential in the atmosphere, SF must be carefully handled to prevent leakage during production and usage. Herein, we report a sod-net metal-azolate framework (MAF) named MAF-stu-111, which decorates methyl and aldehyde groups in the porous windows, showing high adsorption affinity for SF at low pressure. Stability tests, gas adsorption, and breakthrough experiments demonstrated that MAF-stu-111 possesses excellent water and chemical stability, fully reversible SF uptake, high SF/N separation selectivity (10:90, 285.2), good reusability, and high SF recovery purity (99.03%). Theoretical calculations revealed that hydrogen atoms of methyl and aldehyde groups can form multiple hydrogen bonds with SF molecules, which ensure that SF molecules are firmly held within the MAF-stu-111 framework, playing a key role in the selective separation of SF/N.
六氟化硫（SF）作为一种绝缘气体，在电气、半导体和医疗行业中被广泛用作蚀刻剂和造影剂。然而，由于其在大气中的寿命长且全球变暖潜能值高，在生产和使用过程中必须小心处理SF以防止泄漏。在此，我们报道了一种名为MAF-stu-111的 sod-净金属唑酸盐骨架（MAF），其在多孔窗口中修饰了甲基和醛基，在低压下对SF表现出高吸附亲和力。稳定性测试、气体吸附和突破实验表明，MAF-stu-111具有优异的水稳定性和化学稳定性、完全可逆的SF吸附、高SF/N分离选择性（10:90，285.2）、良好的可重复使用性以及高SF回收纯度（99.03%）。理论计算表明，甲基和醛基的氢原子可与SF分子形成多个氢键，这确保了SF分子被牢固地保持在MAF-stu-111骨架内，在SF/N的选择性分离中起关键作用。
