Figueroa-Quintero Leidy, Ramos-Fernandez Enrique Vicente, Narciso Javier
Laboratorio de Materiales Avanzados, Departamento de Química Inorgánica, Instituto Universitario de Materiales de Alicante, Universidad de Alicante, Apartado 99, 03080 Alicante, Spain.
Instituto de Investigación Sanitaria y Biomédica de Alicante (ISABIAL), 03690 Alicante, Spain.
Materials (Basel). 2022 Aug 2;15(15):5326. doi: 10.3390/ma15155326.
Metal-organic frameworks (MOF) are a new type of porous materials that have great potential for adsorption of voltaic organic compounds (VOCs). These types of materials composed of metal ions and organic ligands are easy to synthesize, have high surface areas, their surface chemistry can be adjusted to the desired application, and they can also have good chemical and thermal stability. Therefore, this work focuses on the synthesis of a highly hydrophobic MOF material called CIM-80, a porous material that is made up of the Al cation and the mesaconate linker. This MOF has a B.E.T. of approximately 800 m/g and has potential applications for the adsorption of hydrophobic organic compounds. However, its synthesis is expensive and very dirty. Therefore, we have studied the synthesis conditions necessary to achieve high synthesis yields (85%) and materials with high crystallinity and accessible porosity. To achieve these results, we have used urea as a mild deprotonation reagent and modulator as an alternative to NaOH, which is traditionally used for the synthesis of this MOF. Once the synthesis of this material was controlled, its adsorption/desorption behavior of water and organic compounds such as toluene, cyclohexane and m-xylene was studied by means of vapor adsorption isotherms. The results show the hydrophobic character of the material and the greater affinity the material has toward aliphatic compounds than toward aromatic ones, with toluene being the most adsorbed compound, followed by cyclohexane and m-xylene.
金属有机框架材料（MOF）是一类新型多孔材料，在吸附挥发性有机化合物（VOCs）方面具有巨大潜力。这类由金属离子和有机配体组成的材料易于合成，具有高比表面积，其表面化学性质可根据所需应用进行调整，并且还具有良好的化学和热稳定性。因此，本工作聚焦于合成一种名为CIM - 80的高度疏水MOF材料，它是一种由铝阳离子和中康酸连接体组成的多孔材料。这种MOF的比表面积约为800 m²/g，在吸附疏水有机化合物方面具有潜在应用。然而，其合成成本高昂且过程非常繁琐。因此，我们研究了实现高合成产率（85%）以及具有高结晶度和可及孔隙率材料所需的合成条件。为了达到这些结果，我们使用尿素作为温和的去质子化试剂和调节剂，以替代传统用于合成这种MOF的氢氧化钠。一旦这种材料的合成得到控制，便通过蒸汽吸附等温线研究了其对水以及甲苯、环己烷和间二甲苯等有机化合物的吸附/解吸行为。结果表明该材料具有疏水特性，且对脂肪族化合物的亲和力大于对芳香族化合物的亲和力，其中甲苯是吸附量最大的化合物，其次是环己烷和间二甲苯。
