Two comparable Ba-MOFs with similar linkers for enhanced CO_(2)capture and separation by introducing N-rich groups  

作　　者：Ying Zhao Jiao Liu Min-Le Han Guo-Ping Yang Lu-Fang Ma Yao-Yu Wang 

机构地区：[1]College of Chemistry and Chemical Engineering,Henan Key Laboratory of Function-Oriented Porous Materials,Luoyang Normal University,Luoyang,471934,China [2]Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education,Shaanxi Key Laboratory of Physico-Inorganic Chemistry,College of Chemistry and Materials Science,Northwest University,Xi’an,710127,China

出　　处：《Rare Metals》2021年第2期499-504,共6页稀有金属（英文版）

基　　金：the National Natural Science Foundation of China(Nos.21971207 and21801111);the Project of Central Plains Science and Technology Innovation Leading Talents of Henan Province(No.204200510001);the Natural Science Foundation of Shaanxi Province(No.2019JM-013)。

摘　　要：Two new different metal-organic frameworks(MOFs)[Ba(L1)(H_(2)O)_(2)]_(n)·nH_(2)O(MOF 1)and[Ba(L2)(-n2 O)_(2)]_(n)·0.5 nDMF·0.5 nH_(2)O(MOF 2)were yielded by the assembly of oxygen-friendly Ba(Ⅱ)ions and two similar linkers,namely 2-(imidazol-1-yl)terephthalic acid(H_(2)L1)and 2-(1 H-1,2,4-triazol-1-yl)terephthalic acid(H_(2)L2).Single-crystal X-ray diffractions(XRD)indicate that MOF1 is a new three-dimensional(3 D)stacking dense network formed by the one-dimensional(1 D)rod-shaped chains and L1 linkers,whereas MOF 2 presents a 3 D nanotube porous framework with cylindrical tunnels based on the 1 D loop chains as the secondary building units(SBUs)by replacing the imidazole group in H_(2)L1 with the triazole group in H_(2)L2.As a result,MOF 2 has a higher density of active sites and Lewis acid sites in the porous surface of nanotube than MOF 1.Thereby,the CO_(2)capture and separation capacity of MOF 2 is great higher than that of CH_(4)at298 K.

关 键 词：MOFs Similar linkers Secondary building units(SBUs) CO_(2)capture Isosteric heat 

分 类 号：O641.4[理学—物理化学] TB34[理学—化学]