Molecular Sieving and Direct Visualization of CO2 in Binding Pockets of an Ultramicroporous Lanthanide Metal-Organic Framework Platform

Lin Han, Tony Pham, Mingjing Zhuo, Katherine A. Forrest, Shanelle Suepaul, Brian Space, Michael J. Zaworotko, Wei Shi, Yao Chen, Peng Cheng, Zhenjie Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

Inspired by the structure of carbonic anhydrase, we developed a robust ultramicroporous lanthanide metal-organic framework (MOF) platform (NKMOF-3-Ln), which possesses a porous pocket to selectively bind with CO2 at ambient conditions. Notably, CO2 molecules can be precisely observed in the single-crystal structure of NKMOF-3-Ln. Highly ordered CO2 molecules can strongly interact with the framework via electrostatic interaction of nitrates. We found that the CO2 adsorption capacity and binding energy were gradually enhanced as lanthanide contraction. The strong CO2 binding affinity endows NKMOF-3-Ln with excellent CO2 separation performance, which is verified by experimental breakthrough results.

Original languageEnglish
Pages (from-to)23192-23197
Number of pages6
JournalACS Applied Materials and Interfaces
Volume11
Issue number26
DOIs
Publication statusPublished - 3 Jul 2019

Keywords

  • CO capture
  • fluorescence response
  • gas separation
  • lanthanide
  • metal-organic framework

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