【无机化学学报】doi: 10.11862/CJIC.20240177
Different solvothermal reactions of ZnC2O4 with oxalic acid (H2ox) and 1, 2, 4-triazole (Htrz) successfully gave a new quaternary (NJTU-Bai83, NJTU-Bai=Nanjing Tech University Bai's group) and a new quinary (NJTU- Bai84) anionic metal-organic frameworks (MOFs), where NJTU-Bai83=(Me2NH2)2[Zn3(trz)2(ox)3]·2H2O and NJTU-Bai84=(Me2NH2)[Zn3(trz)3(ox)2]·H2O, respectively. With the [Zn2(ox)4(trz)2] secondary building unit (SBU) in NJTU- Bai83 replaced by the [Zn3(ox)2(trz)6] and planar [Zn(ox)2(trz)2] ones in NJTU-Bai84, 2D supramolecular building layers (SBLs) are changed from the A-layer and B-layer to another A-layer, while pillars are transformed from the tetrahedral [Zn(ox)2(trz)2] SBU to the irregular tetrahedral [Zn(ox)2(trz)2] and planar [Zn(ox)2(trz)2] SBUs. Thus, cdq-topological quaternary NJTU-Bai83 is tuned to (4, 4, 8)-c new topological quinary NJTU-Bai84. Two MOFs were well characterized by powder X-ray diffraction, thermogravimetric analysis, elemental analysis, etc.
【无机化学学报】doi: 10.11862/CJIC.20240355
利用高效绿色材料捕获CO2有助于减少人为向大气中排放CO2。目前，面向工业烟道气CO2捕获的高性能金属有机骨架(MOF)材料的设计与合成研究已步入应用驱使的新阶段。研发和制备具有优越综合性能的CO2捕获MOF材料是一项重要挑战。本综述重点关注面向工业烟道气CO2捕获的基于廉价配体MOF材料的研究现状，总结并讨论了其结构、水/热/化学稳定性、吸附量与选择性、吸附能力受湿气的影响、多轮循环使用性、再生性及宏量制备等性能。
【无机化学学报】doi: 10.11862/CJIC.20250110
Perfluoroalkyl acids of different chain lengths, including trifluoroacetic acid, heptafluorobutyric acid, and nonafluoropentanoic acid, were used as second ligands to replace the formic acid on the Zr6 clusters in MOF-808. This led to the formation of a series of MOF-808-R materials (R=F3, F7, F9, corresponding to trifluoroacetic acid, heptafluorobutyric acid, and nonafluoropentanoic acid) with multiple ligands, and we investigated the impact of the second ligand modification on pore size and pore environment. The loading amount of the second ligand was determined using NMR and other methods. We conducted adsorption tests for acetylene and carbon dioxide at different temperatures on both MOF-808 and MOF-808-R to explore the effects of the ligand diversification on acetylene separation performance. It was found that MOF-808-F7 exhibited the best performance in acetylene-carbon dioxide separation.
【无机化学学报】doi: 10.11862/CJIC.20260131
Novel adsorbents for efficient natural gas purification should strike a balance between high selective adsorption performance and moderate adsorption enthalpy. To develop such materials, herein, a novel (3,6)-c topological metal-organic framework (MOF) featuring terminal coordinated acetate was constructed from [Fe3(μ3-O)(acetate)2(carboxyl)4(pyridyl)2] cluster and 5-(pyridin-4-yl)isophthalic acid, yielding [Fe2ⅢFeⅡ(μ3-O)(acetate)2(L)2(H2O)]·xGuest (designated as NJTU-Bai89; NJTU-Bai stands for Nanjing Tech University Bai′s group). The methyl group of acetate is impendent in the 1D pore channel, dividing it into the gourd-shaped one. Interestingly, NJTU-Bai89 exhibited high low-pressure C3H8 uptake and moderate adsorption enthalpy, owing to effective synergy between a suitable pore size and accessible nonpolar pore surfaces.
