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Advanced Materials

Gas-Sorption Selectivity of CUK-1: A Porous Coordination Solid Made of Cobalt(II) and Pyridine-2,4- Dicarboxylic Acid


  • This work was supported by KRICT for the Institutional Research Program (J.S.C.), MOCIE for the Research Center for Nanocatalysts, and the EPSRC for funding (S.M.H.). We would like to thank Dr. D. Y. Hong (KRICT), Dr. P. M Forster (Stony Brook University), and Dr. C. Serre (Institut Lavoisier) for helpful discussions, and G. F. Weldon (Cambridge, Synthesis) and M. E. Grass (Berkeley) for verification of sorption data. Supporting Information is available online from Wiley InterScience or from the author.


As a size-selective molecular sieve, the coordination polymer formed from cobalt and pyridine-2,4-dicarboxylic acid (CUK-1, see figure) shows unprecedented selectivity for O2 and preferential selectivity for CO2 over CH4. The present sorption results encourage the development of new adsorbent materials that may find use in the production of high-purity gas products. This work demonstrates that CUK-1 can be utilized, for the first time, in the separation of light gases via gas chromatography.

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