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  • Simultaneous Trapping of C ...
    Hao, Hong-Guo; Zhao, Yun-Feng; Chen, Di-Ming; Yu, Jia-Mei; Tan, Kui; Ma, Shengqian; Chabal, Yves; Zhang, Zhi-Ming; Dou, Jian-Min; Xiao, Zi-Hui; Day, Gregory; Zhou, Hong-Cai; Lu, Tong-Bu

    Angewandte Chemie International Edition, 2018-Dec-03, 2018-12-03, Letnik: 57, Številka: 49
    Journal Article

    The removal of C H and C H from C H streams is of great significance for feedstock purification to produce polyethylene and other commodity chemicals but the simultaneous adsorption of C H and C H over C H from a ternary mixture has never been realized. Herein, a robust metal-organic framework, TJT-100, was designed and synthesized, which demonstrates remarkably selective adsorption of C H and C H over C H . Breakthrough experiments show that TJT-100 can be used as an adsorbent for high-performance purification of C H from a ternary mixture of C H /C H /C H (0.5:99:0.5) to afford a C H purity greater than 99.997 %, beyond that required for ethylene polymerization. Computational studies reveal that the uncoordinated carboxylate oxygen atoms and coordinated water molecules pointing towards the pore can trap C H and C H through the formation of multiple C-H⋅⋅⋅O electrostatic interactions, while the corresponding C H -framework interaction is unfavorable.