Bibliographic Details
| Title: |
In situ generated 2,5-pyrazinedicarboxylate and oxalate ligands leading to a Eu-MOF for selective capture of C2H2 from C2H2/CO2. |
| Authors: |
Liang, Fenglan, Ma, Deyun, Qin, Liang, Yu, Qiuqun, Chen, Jing, Liang, Rongxi, Zhong, Changheng, Liao, Huanzong, Peng, Zhiyi |
| Source: |
Dalton Transactions: An International Journal of Inorganic Chemistry; 6/28/2024, Vol. 53 Issue 24, p10070-10074, 5p |
| Subject Terms: |
OXALATES, OXALIC acid, POROUS materials, SEPARATION (Technology) |
| Abstract: |
The separation of C2H2/CO2 mixtures is a very important but highly challenging task due to their comparable physical natures and relative sizes. Herein, we report a europium-based 3D microporous MOF with a 4-connected two-nodal net with {4·53·62}2{42·62·82} topology, {[Eu2(pzdc)(ox)2(H2O)4]·5H2O}n (1) (H2pzdc = 2,5-pyrazinedicarboxylic acid, H2ox = oxalic acid), prepared by a hydrothermal method involving in situ generation of 2,5-pyrazinedicarboxylate and oxalate ligands. Two different temperatures were utilized to create two porous materials (1a and 1b) with channels of 4.8 × 5.4 Å and 4.1 × 6.3 Å, and 4.8 × 5.4 and 4.6 × 8.7 Å2, respectively. 1b shows a superior ability to selectively capture C2H2 from C2H2/CO2 as compared with 1a. At 1 bar and 298 K, 1b takes up 4.10 mmol g−1 C2H2 and 1.84 mmol g−1 CO2, respectively. In addition, at 298 K and 1 bar, 1b has a high selectivity for C2H2 over CO2, with an IAST selectivity of 12.7 while the value for 1a is 3.2. The separation of C2H2/CO2 with 1b also exhibits good reusability. [ABSTRACT FROM AUTHOR] |
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| Database: |
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