Fonseca Javier, Choi Sunho
Nanomaterial Laboratory for Catalysis and Advanced Separations, Department of Chemical Engineering, Northeastern University, 313 Snell Engineering Center, 360 Huntington Avenue, Boston, Massachusetts 02115-5000, USA.
Dalton Trans. 2021 Mar 9;50(9):3145-3154. doi: 10.1039/d1dt00079a.
Selective separation of light hydrocarbons (LHs) and adsorption of volatile organic compounds (VOCs) remain expensive and complex scientific challenges in the petrochemical industry. Shape-selective adsorbent materials can cost-effectively face these demands. Two new porous, dynamic and amorphous metal-organic frameworks (MOFs), NEU-3 [= Zn(PMDA)(Py)2] and NEU-4 [= Fe(PMDA)(Py)2] are disclosed. These MOFs along with NEU-1c [= Zn(BPDI)(Py)2] and NEU-2 [= Fe(BPDI)(Py)2] display an electron-deficient pore surface due to predesigned π-electron-deficient ligands. They are unique smart guest-responsive materials owing to their π Lewis acidic pore surface and presumably their framework flexibility. A variety of effective adsorptions and adsorptive separations is achieved by using beds of NEU-1c, NEU-2, NEU-3 and NEU-4. Promising for further investigations into the petrochemical industry, NEU-4 shows ultrahigh benzene adsorption, recognition capability, selectivity for benzene over its analogues, and high stability and regenerability.
在石油化学工业中，轻质烃（LHs）的选择性分离和挥发性有机化合物（VOCs）的吸附仍然是昂贵且复杂的科学挑战。择形吸附剂材料能够经济高效地满足这些需求。本文公开了两种新型多孔、动态且无定形的金属有机框架（MOF），即NEU-3 [= Zn(PMDA)(Py)2] 和NEU-4 [= Fe(PMDA)(Py)2]。这些MOF与NEU-1c [= Zn(BPDI)(Py)2] 和NEU-2 [= Fe(BPDI)(Py)2] 一起，由于预先设计的缺π电子配体，呈现出缺电子的孔表面。由于其π路易斯酸性孔表面以及可能的骨架灵活性，它们是独特的智能客体响应材料。通过使用NEU-1c、NEU-2、NEU-3和NEU-4的床层，可以实现多种有效的吸附和吸附分离。NEU-4对石油化学工业的进一步研究具有前景，它表现出超高的苯吸附量、识别能力、对苯相对于其类似物的选择性以及高稳定性和可再生性。
