Allyl-Functionalized ZrT-1 for C 2 H 2 /CO 2 Separation

Abstract

To optimize the separation performance of Metal-Organic Cages (MOCs) for C 2 H 2 /CO 2 , this study adopted ligand functionalization as the core strategy to regulate pore structure. An allyl-functionalized terephthalic acid ligand was designed and synthesized, which was then used to construct ZrT-1-allyl. The ZrT-1-allyl maintains the same framework structure as ZrT-1. The introduction of the allyl group regulates the pore size, optimizes the pore microenvironment, and thereby achieves the selective adsorption of C 2 H 2 . The test results show that ZrT-1-allyl exhibits excellent adsorption affinity for C 2 H 2 . At 298 K and 1 bar, its C 2 H 2 adsorption capacity (42.54 cm3/g) is significantly improved, and both the separation selectivity and dynamic separation duration for C 2 H 2 /CO 2 (24min/g) are superior to those of the parent ZrT-1 material. This study confirms that allyl functionalization is an effective method to regulate the pore structure and adsorption performance of ZrT-1, providing new ideas and experimental basis for the design of high-performance MOCs materials for C 2 H 2 /CO 2 separation.