Jin Xin, Jiang Hui, Chen Yi, Han Xin, Sun Ken, Shi Linlin, Hao Xin-Qi, Song Mao-Ping
College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
College of Energy and Power Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China.
Nanomaterials (Basel). 2022 Dec 9;12(24):4402. doi: 10.3390/nano12244402.
Porous organometallic nanomaterials are a new class of materials based on a three-dimensional structure. They have excellent applications in different fields, but their applications in gas storage and separation have not been fully developed. CO adsorption storage and hydrocarbon separation has been a challenging industrial problem. Several typical molecular adsorbents have been used to study the separation, but the problems of long-term stability, high selectivity and synthetic complexity of these adsorbents remain to be solved. Here, we have designed and synthesized tetrahedral metal supramolecular nanocage with custom cavities based on the unique rigid structure of triptycene derivatives. Using the unique discrete porous structure of tetrahedral metal nanocages, the gas adsorption and separation performance of the metal supramolecular nanocage was investigated. By analyzing the adsorption and desorption isotherms and the multi-component competitive adsorption curves, we noticed that the tetrahedral supramolecular nanocages had good CO storage capacity and good separation capacity for CH/CO and CH/N. All these indicate that porous organic metal nanomaterials are expected to be a new energy saving separation material.
多孔有机金属纳米材料是一类基于三维结构的新型材料。它们在不同领域有着出色的应用，但在气体存储和分离方面的应用尚未得到充分开发。CO吸附存储和碳氢化合物分离一直是一个具有挑战性的工业问题。几种典型的分子吸附剂已被用于研究分离，但这些吸附剂的长期稳定性、高选择性和合成复杂性问题仍有待解决。在此，我们基于三蝶烯衍生物独特的刚性结构，设计并合成了具有定制空腔的四面体金属超分子纳米笼。利用四面体金属纳米笼独特的离散多孔结构，研究了金属超分子纳米笼的气体吸附和分离性能。通过分析吸附和解吸等温线以及多组分竞争吸附曲线，我们发现四面体超分子纳米笼对CO具有良好的存储能力，对CH/CO和CH/N具有良好的分离能力。所有这些表明多孔有机金属纳米材料有望成为一种新型节能分离材料。
