Duan Yuefeng, Huang Yuhang, Wang Chongqing, Wang Qian, Ge Kai, Lu Zhiyong, Wang Huijie, Duan Jingui, Bai Junfeng, Jin Wanqin
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University Nanjing 211816 China
School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
Chem Sci. 2023 Apr 3;14(17):4605-4611. doi: 10.1039/d3sc00877k. eCollection 2023 May 3.
Highly efficient ethylene (CH) and acetylene (CH) separation is a great challenge and an important process in current industries. Herein, we finely tune a new family of 6-c metal-organic frameworks (MOFs) with crab-like carboxylic pincers for the recognition of a CH tetramer and afford NTU-72 with high adsorption CH/CH selectivity (56-441, 298 K) as well as unprecedented recovery of both highly pure CH (99.95%) and CH (99.36%). Furthermore, the effective binding of a CH tetramer by NTU-72's carboxylic pincers has been revealed by gas-loaded crystallography and Raman spectral studies. Our work provides a novel approach for the selective binding of a small molecular cluster for designing high-performance MOFs.
高效分离乙烯（CH）和乙炔（CH）是一项巨大挑战，也是当前工业中的一个重要过程。在此，我们用蟹状羧酸钳对一类新型的6-c金属有机框架（MOF）进行精细调控，以识别CH四聚体，并得到具有高吸附CH/CH选择性（56 - 441，298K）的NTU - 72，以及前所未有的高纯度CH（99.95%）和CH（99.36%）的回收率。此外，通过气体负载晶体学和拉曼光谱研究揭示了NTU - 72的羧酸钳对CH四聚体的有效结合。我们的工作为设计高性能MOF的小分子簇选择性结合提供了一种新方法。
