Self-Interpenetrated Water-Stable Microporous Metal–Organic Framework toward Storage and Purification of Light Hydrocarbons
Yang Qiao, Chang Xue, Jinyu Zheng, Mao Yi, Ze Chang, Mei‐Hui Yu, Xian‐He Bu
Abstract
Storage and purification of light hydrocarbons are very meaningful for their high-purity requirements and safety utilization in the fields of industry and clean energy. It is a simple and effective way to achieve this goal utilizing the physical adsorption properties of stable porous metal–organic frameworks (MOFs). In this work, a stable self-interpenetrated three-dimensional MOF with a new 3,4-connected topology, {[Zn2(tpda)2(4,4′-bpy)]·4DMF}n (NKM-101; H2tpda = 4,4′-[4-(4H-1,2,4-triazol-4-yl)phenyl]dibenzoic acid, 4,4′-bpy = 4,4′-bipyridine, and DMF = N,N-dimethylformamide), has been successfully constructed based on a triazole–carboxyl ligand. The dense functional active sites existing on the inner walls of one-dimensional channels of NKM-101 are beneficial to enhancement of the binding affinities between the framework and specific molecules (CO2, C2–C4). Therefore, the selective adsorption and separation performance of the material on CO2/CH4 and C2–C4/CH4 are effectively improved. In addition, NKM-101 also exhibits excellent water stability, making it possible to be a practical material for the storage and purification of light hydrocarbons.