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Updated: Jan 23, 2026

Synthesis and Characterization of Functionalized Metal-organic Frameworks
Published on: September 5, 2014
Molecular Sieving and Direct Visualization of CO2 in Binding Pockets of an Ultramicroporous Lanthanide Metal-Organic
Lin Han, Tony Pham1, Mingjing Zhuo
1Department of Chemistry , University of South Florida , Tampa Bay , Florida 33620-5250 , United States.
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. Moreover, because of the specific binding affinity of CO2, NKMOF-3-Eu showed a fluorescence response to CO2.
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