Alp Arici Tuğba, Şevik Melike, Kavak Enes, Arici Mürsel
Department of Chemical Technology, Emet Vocational School, Kütahya Dumlupınar University, Kütahya 43700, Türkiye.
Department of Chemistry, Faculty of Science, Eskişehir Osmangazi University, Eskişehir 26040, Türkiye.
Inorg Chem. 2025 Jul 7;64(26):13540-13548. doi: 10.1021/acs.inorgchem.5c02360. Epub 2025 Jun 24.
A multifunctional metal-organic framework (MOF), {(pbisoixH)[Zn(μ-BDPFA)]·2DMF·4HO} (ESOGU-3) (BDPFAH: ,-bis(3,5-dicarboxyphenyl)fumaramide, pbisoixH: protonated form of 1,4-bis(2-isopropylimidazol-1-ylmethyl)benzene) was synthesized and thoroughly characterized using a variety of analytical techniques. X-ray crystallographic analysis revealed that the anionic 3D framework is constructed from Zn(II) ions coordinated with BDPFA ligands, with the framework's negative charge balanced by protonated pbisoixH counterions. The anionic frameworks interpenetrated each other to form a 2-fold interpenetrating porous 3D framework. Thanks to its porous architecture and stability in water, ESOGU-3 was evaluated for gas and dye adsorption performance. The single-component gas adsorption results showed that ESOGU-3 with a BET surface area of 805.73 m/g displayed selective CO adsorption (3.82 mmol/g at 100 kPa) over CH and N at 273 K. The enhanced CO adsorption capacity was attributed to amide-functionalized groups within the framework. Furthermore, ESOGU-3, featuring an anionic framework, exhibited selective adsorption toward the smaller cationic methylene blue (MB), achieving a maximum adsorption capacity of 415.78 mg/g. This selectivity is attributed to favorable electrostatic interactions with MB over anionic dyes and size-exclusion effects that limit the adsorption of the larger rhodamine B (RhB) dye.
合成了一种多功能金属有机框架（MOF），{(pbisoixH)[Zn(μ-BDPFA)]·2DMF·4HO}（ESOGU-3）（BDPFAH：，-双（3,5-二羧基苯基）富马酰胺，pbisoixH：1,4-双（2-异丙基咪唑-1-基甲基）苯的质子化形式），并使用多种分析技术对其进行了全面表征。X射线晶体学分析表明，阴离子三维框架由与BDPFA配体配位的Zn(II)离子构成，框架的负电荷由质子化的pbisoixH抗衡离子平衡。阴离子框架相互贯穿形成一个2重贯穿的多孔三维框架。由于其多孔结构和在水中的稳定性，对ESOGU-3的气体和染料吸附性能进行了评估。单组分气体吸附结果表明，BET表面积为805.73 m/g的ESOGU-3在273 K下对CO的吸附具有选择性（100 kPa下为3.82 mmol/g），优于CH和N。增强的CO吸附能力归因于框架内的酰胺官能团。此外，具有阴离子框架的ESOGU-3对较小的阳离子亚甲基蓝（MB）表现出选择性吸附，最大吸附容量为415.78 mg/g。这种选择性归因于与MB相比与阴离子染料更有利的静电相互作用以及限制较大罗丹明B（RhB）染料吸附的尺寸排阻效应。
