Incorporation of bifunctional aminopyridine into an NbO-type MOF for the markedly enhanced adsorption of CO2 and C2H2 over CH4

被引：44
作者：
He, Minghui [1 ]
Xu, Tingting [1 ]
Jiang, Zhenzhen [1 ]
Yang, Luyao [1 ]
Zou, Ying [1 ]
Xia, Fengjie [1 ]
Wang, Xia [1 ]
Wang, Xiaojuan [1 ]
He, Yabing [1 ]
机构：
[1] Zhejiang Normal Univ, Coll Chem & Life Sci, Key Lab, Minist Educ Adv Catalysis Mat, Jinhua 321004, Zhejiang, Peoples R China
来源：
INORGANIC CHEMISTRY FRONTIERS | 2019年 / 6卷 / 05期
关键词：
METAL-ORGANIC FRAMEWORK; DIISOPHTHALATE LIGAND; SELECTIVE SORPTION; ACETYLENE STORAGE; NITROGEN SITES; MOF-505; ANALOG; PORE-SIZE; SEPARATION; CAPACITY; METHANE;
D O I：
10.1039/c9qi00195f
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The development of porous MOFs exhibiting highly selective C2H2/CH4 and CO2/CH4 separations is quite important to meet the requirement of high-purity C2H2 and CH4 in various industries. By employing a ligand heterobifunctionalization strategy, we designed and synthesized an aminopyridine-functionalized diisophthalate ligand, and successfully targeted its corresponding copper-based NbO-type MOF ZJNU-98. Gas adsorption studies revealed that ZJNU-98 exhibited significantly enhanced adsorption of C2H2 and CO2 over CH4 compared to its parent MOF, NOTT-101. At 298 K and 1 atm, C2H2 and CO2 uptakes of ZJNU-98 are 10.0% and 16.7% higher than the corresponding values of NOTT-101, while 14.2% and 18.8% increases in C2H2/CH4 and CO2/CH4 adsorption selectivities were observed for the equimolar gas mixtures in ZJNU-98 compared to NOTT-101. Furthermore, the contribution of the functional group effect on gas adsorption has been assessed, demonstrating that the amine group plays a more important role than the pyridinic-N atom despite its lower Lewis basicity. This work provided an effective way and significant experimental evidence for the design of new porous MOFs with highly enhanced gas adsorption performance.
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收藏
页码：1177 / 1183
页数：7
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