Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Department of Chemistry, Longgang Institute, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China.
National Center for Magnetic Resonance in Wuhan, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, APM, Chinese Academy of Sciences, West 30 Xiaohongshan, Wuhan, Hubei 430071, People's Republic of China.
ACS Macro Lett. 2022 Aug 16;11(8):999-1007. doi: 10.1021/acsmacrolett.2c00320. Epub 2022 Jul 21.
The development of porous solid adsorbents for selective adsorption and separation of SO has attracted much attention recently. Herein, we design porous organic polymers (POPs) decorated with pyridine ligands as building units (POP-Py) through a radical polymerization of the 2,5-divinylpyridine (v-Py) monomer. Due to its high BET surface area, nanoporosity, and excellent stability, the prepared POP-Py can be used for reversible adsorption and efficient separation of SO. The POP-Py possesses a SO capacity of 10.8 mmol g at 298 K and 1.0 bar, which can be well retained after 6 recycles, showing an excellent reversible adsorption capacity. The POP-Py also shows superior separation performance for SO from a ternary SO/CO/N mixture (0.17/15/84.83v%), giving a breakthrough time and a saturated SO capacity at 178 min g and 0.4 mmol g. The retention time was well maintained even under high moisture conditions, confirming its superior water resistance. Furthermore, when other vinyl-functionalized organic ligand monomers (bipyridine, pyrimidine, and pyrazine) were employed for radical polymerization, all of the resultant porous organic ligand polymers (POP-BPy, POP-PyI, and POP-PyA) exhibited superior performance for reversible adsorption and efficient separation of SO. The combined features of reversible adsorption, efficient separation, and water resistance are important for the industrial applications of these materials as SO adsorbents.
最近，人们对用于 SO 选择性吸附和分离的多孔固体吸附剂的发展产生了浓厚的兴趣。在此，我们通过 2,5-二乙烯基吡啶（v-Py）单体的自由基聚合，设计了具有吡啶配体作为构筑单元的多孔有机聚合物（POPs）（POP-Py）。由于其具有高 BET 比表面积、纳米多孔性和优异的稳定性，所制备的 POP-Py 可用于 SO 的可逆吸附和高效分离。POP-Py 在 298 K 和 1.0 bar 下具有 10.8 mmol g 的 SO 容量，经过 6 次循环后仍能很好地保留，表现出优异的可逆吸附容量。POP-Py 还表现出从 SO/CO/N 三元混合物（0.17/15/84.83v%）中对 SO 进行优异的分离性能，在 178 min g 和 0.4 mmol g 时达到穿透时间和饱和 SO 容量。即使在高湿度条件下，保留时间也能很好地保持，证实了其出色的耐水性。此外，当使用其他乙烯基官能化有机配体单体（联吡啶、嘧啶和吡嗪）进行自由基聚合时，所得的所有多孔有机配体聚合物（POP-BPy、POP-PyI 和 POP-PyA）均表现出对 SO 的可逆吸附和高效分离的优异性能。可逆吸附、高效分离和耐水性的综合特点对于这些材料作为 SO 吸附剂在工业应用中的重要性。
