The growing interest in metal–organic frameworks (MOFs) in both industrial and scientific circles has increased in the last twenty years, owing to their crystallinity, structural versatility, and controlled porosity. In this study, we present three novel MOFs obtained from the 1, 3, 5-tris (1H-benzo[d]imidazole-2-yl) benzene (TIBM) organic linker. The formed TIBM crystal powders were characterized by scanning electron microscopy (SEM) to estimate the morphology of the particles, powder X-ray diffraction (XRD) to confirm the crystal structure, Brunauer–Emmett–Teller (BET) method for structural analysis, and thermogravimetric measurements to examine the thermal stability. The TIBM-Cu MOF showed excellent CO₂ (3.60 mmol/g) adsorption capacity at 1 bar and 298 K, because of the open Cu site, compared to TIBM-Cr (1.6 mmol/g) and TIBM-Al (2.1 mmol/g). Additionally, due to the high porosity (0.3–1.5 nm), TIBM-Cu MOF showed a considerable CO₂/N₂ selectivity (53) compared to TIBM-Al (35) and TIBM-Cr (10).

中文翻译：

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1, 3, 5-tris (1H-benzo[d]imidazole-2-yl) 苯基MOFs的可控合成

在过去的 20 年里，工业和科学界对金属有机骨架 (MOF) 的兴趣日益浓厚，因为它们具有结晶性、结构多功能性和可控的孔隙率。在这项研究中，我们展示了从 1, 3, 5-tris (1H-benzo[d]imidazole-2-yl) 苯 (TIBM) 有机接头获得的三种新型 MOF。形成的 TIBM 晶体粉末通过扫描电子显微镜 (SEM) 进行表征以估计颗粒的形态，通过粉末 X 射线衍射 (XRD) 来确认晶体结构，通过 Brunauer-Emmett-Teller (BET) 方法进行结构分析，以及热重测量以检查热稳定性。TIBM-Cu MOF 表现出优异的 CO ₂与 TIBM-Cr (1.6 mmol/g) 和 TIBM-Al (2.1 mmol/g) 相比，在 1 bar 和 298 K 下的吸附容量为 (3.60 mmol/g)，因为有开放的 Cu 位点。此外，由于高孔隙率（0.3-1.5 nm），与 TIBM-Al（35）和 TIBM-Cr（10）相比，TIBM-Cu MOF 显示出相当大的 CO ₂ /N ₂选择性（53）。