Angew. Chem. ：利用互锁策略构建孔分割金属有机框架用于高效纯化乙炔

  • A+

在石化工业中，乙炔（C2H2）的高效分离纯化始终是一个极具挑战性的科学难题，主要是源于其与二氧化碳（CO2）和乙烯（C2H4）具有相似的物理化学性质。金属有机框架（MOFs）因其可调控的孔结构和功能化表面，在气体分离领域展现出巨大潜力，但已报道的对C2H2具有吸附分离能力的MOFs通常存在吸附容量和选择性难以兼顾的矛盾。而孔隙空间分配（PSP）策略可通过调控孔尺寸和增加客体结合位点密度，以提高特定的气体吸附能力及选择性。

1

图1. 采用“2D→3D互锁”策略构筑PSP MOF以解决C2H2吸附量和选择性之间的矛盾。

近日，西北大学的杨国平教授、王尧宇教授和三峡大学的李东升教授合作，首次采用“2D→3D互锁”策略成功构建了一种新型的PSP MOF材料Ni-dcpp-bpy。其通过主体框架互锁实现了孔径优化，同时在孔表面成功引入了功能N/O位点，这一特点有助于增强框架与C2H2的相互作用。


气体吸附分离实验表明，相比于传统的PSP MOFs，Ni-dcpp-bpy同时表现出良好的C2H2吸附能力和高的选择性，并且能够从二元和三元混合气体中实现高纯度C2H4（> 99.9%）分离的同时获得高生产率C2H2。此外，宏量制备的Ni-dcpp-bpy在经过20次C2H2/CO2分离循环后，仍能保持框架稳定，证明其还具有优异的稳定性、可重复使用性和工业化应用前景。理论计算表明，C2H2与框架之间主要通过C−H···N/O氢键以及范德华力等相互作用。


综上所述，该工作采用的互锁策略不仅提高了工业C2H2纯化的效率，也为构建高性能PSP MOF材料提供了一种新的思路。

2

图2. (a) C2H2、CO2、C2H4和CH4的吸附曲线；(b) Ni-dcpp-bpy对不同气体混合物的选择性；(c-f) 不同比例混合物的分离曲线；(g) 不同气体分子在Ni-dcpp-bpy中的位置模拟及结合能。

论文信息

A Scalable Pore-space-partitioned Metal-organic Framework Powered by Polycatenation Strategy for Efficient Acetylene Purification

Zhen-Hua Guo, Dr. Xue-Qian Wu, Prof. Dr. Ya-Pan Wu, Prof. Dr. Dong-Sheng Li, Prof. Dr. Guo-Ping Yang, Prof. Dr. Yao-Yu Wang


Angewandte Chemie International Edition

DOI: 10.1002/anie.202421992

weinxin
我的微信
关注我了解更多内容

发表评论

目前评论：1

    • Felipa 2025年05月23日 16时05分 [value:no/]层

      Howdy! Do you use Twitter? I'd like to follow you if
      that would be okay. I'm undoubtedly enjoying
      your blog and look forward to new posts.
      casino en ligne
      Great weblog right here! Also your website lots up very fast!

      What host are you using? Can I get your affiliate hyperlink to your host?

      I desire my web site loaded up as quickly as yours lol
      casino en ligne
      When I initially commented I appear to have clicked
      the -Notify me when new comments are added- checkbox and now
      each time a comment is added I recieve four emails with the exact
      same comment. Perhaps there is a means you can remove me
      from that service? Thank you!
      casino en ligne
      Good day! This is my first comment here so I
      just wanted to give a quick shout out and say I really enjoy
      reading your articles. Can you recommend any other blogs/websites/forums
      that go over the same subjects? Thank you so much!

      casino en ligne
      These are genuinely wonderful ideas in concerning blogging.
      You have touched some fastidious factors here.
      Any way keep up wrinting.
      casino en ligne
      Hurrah! Finally I got a webpage from where I be capable of in fact take useful information regarding my study and knowledge.

      casino en ligne
      certainly like your web site but you have to test the spelling on quite a few of your posts.
      Many of them are rife with spelling problems and I find it very bothersome to inform the truth then again I will definitely come again again.
      casino en ligne
      Hurrah, that's what I was looking for, what a information! present here at this blog, thanks admin of this website.

      casino en ligne
      Actually no matter if someone doesn't be aware of afterward its up to other users that they will help,
      so here it happens.
      casino en ligne
      There's certainly a great deal to learn about this topic.

      I really like all of the points you made.


      casino en ligne