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Two zinc metal-organic framework isomers based on pyrazine tetracarboxylic acid and dipyridinylbenzene for adsorption and separation of CO2 and light hydrocarbons.
Dalton Transactions ( IF 3.5 ) Pub Date : 2020-01-02 , DOI: 10.1039/c9dt04305e
Yu Ye 1 , Jianfeng Du 1 , Libo Sun 2 , Yuchuan Liu 1 , Shun Wang 1 , Xiaowei Song 1 , Zhiqiang Liang 1
Affiliation  

Two highly porous metal-organic framework isomers Zn2(TCPP)(DPB) (1 and 2, H4TCPP = 2,3,5,6-tetrakis(4-carboxyphenyl)pyrazine and DPB = 1,4-di(pyridin-4-yl)benzene) were successfully synthesized using different solvents and acid species to adjust the topologies of these two MOFs. Both of them were constructed by paddlewheel Zn2(COO)4, TCPP4-, and DPB ligands. In compound 1, the Zn2(COO)4 paddlewheel units were fitted together by the TCPP4- ligands to form two-dimensional layers, which were further connected by DPB ligands as pillars to construct a two-fold catenated 3D framework. In compound 2, the cross-linkage of Zn2(COO)4 paddlewheel units and TCPP4- ligands resulted in a three-dimensional framework of Zn-TCPP, in which DPB ligands coordinated to two axial vertical dinuclear Zn2(COO)4. Both activated MOFs exhibited permanent porosity with high BET areas (1324 m2 g-1 for 1 and 1247 m2 g-1 for 2) and possessed narrow pore size distributions (0.93 nm for 1 and 1.02 nm for 2). Moreover, the adsorption behaviors of the two activated MOFs for CO2 and light hydrocarbons (C1, C2, and C3) at low pressure were evaluated and favorable selectivity was proven for C3H8/C3H6 over CH4. These two MOF materials reported in this study for selective CO2 and light hydrocarbon capture have immense potential applications for environmental protection.

中文翻译:

基于吡嗪四羧酸和二吡啶基苯的两种锌金属-有机骨架异构体,用于吸附和分离CO2和轻烃。

两种高度多孔的金属-有机骨架异构体Zn2(TCPP)(DPB)(1和2,H4TCPP = 2,3,5,6-四(4-羧苯基)吡嗪,DPB = 1,4-二(吡啶-4- yl)苯)已成功地使用不同的溶剂和酸种类合成,以调整这两个MOF的拓扑结构。他们两个都是由桨轮Zn2(COO)4,TCPP4-和DPB配体构建的。在化合物1中,通过TCPP4-配体将Zn2(COO)4桨轮单元装配在一起以形成二维层,再通过DPB配体作为支柱将其连接起来,以构建一个二维的链状3D框架。在化合物2中,Zn2(COO)4桨轮单元和TCPP4-配体的交联形成了Zn-TCPP的三维框架,其中DPB配体与两个轴向垂直双核Zn2(COO)4配位。两种活化的MOF都显示出具有高BET面积的永久孔隙率(1的1324 m2 g-1和2的1247 m2 g-1)并具有窄的孔径分布(1的0.93 nm和2的1.02 nm)。此外,评估了两种活化的MOF在低压下对CO2和轻烃(C1,C2和C3)的吸附行为,并证明了C3H8 / C3H6的选择性优于CH4。这项研究中报道的这两种MOF材料具有选择性的CO2和轻烃捕集的潜力,在环境保护方面具有巨大的潜力。评估了低压下的C3H3和C3),并证明了C3H8 / C3H6相对于CH4具有良好的选择性。这项研究中报道的这两种MOF材料具有选择性的CO2和轻烃捕集的潜力,在环境保护方面具有巨大的潜力。对C3H8 / C3H6和CH3的低压进行了评估,并证明了其对CH4的有利选择性。这项研究中报道的这两种MOF材料具有选择性的CO2和轻烃捕集的潜力,在环境保护方面具有巨大的潜力。
更新日期:2020-01-14
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