Metal organic gels (MOGs) are a class of supramolecular complexes, which have attracted widespread interest because of the coupled advantages of inorganic and organic building blocks. A new compound terminated with catechol was synthesized. This new compound can be used to coordinate with Ni²⁺ to form MOGs. These MOGs show favorable viscoelasticity and wormhole-shaped porous structures, which were confirmed by transmission electron microscope and scanning electronic microscope images. Taking the benefits of porosity into account, the xerogel could serve as an adsorbent to adsorb dye molecules from the aqueous media. The experimental results indicate that xerogels possess good adsorption effect both on anionic and cationic dyes. Exhaustive research has been performed on the adsorption kinetics and isotherms, revealing that the adsorption process accords with the pseudo-second-order model and the Langmuir model.

中文翻译：

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邻苯二酚基配体与醋酸镍（II）的金属有机凝胶对染料的吸附

金属有机凝胶（MOG）是一类超分子络合物，由于无机和有机结构单元的耦合优势，引起了广泛的关注。合成了一种新的以邻苯二酚终止的化合物。该新化合物可用于与Ni ^2+配位形成MOG。这些MOG显示出良好的粘弹性和蠕虫状的多孔结构，这已经通过透射电子显微镜和扫描电子显微镜图像得到证实。考虑到多孔性的好处，干凝胶可以用作吸附剂，以吸收水性介质中的染料分子。实验结果表明，干凝胶对阴离子和阳离子染料均具有良好的吸附作用。对吸附动力学和等温线进行了详尽的研究，结果表明吸附过程符合拟二阶模型和Langmuir模型。