Chemical safety articles within Nature Materials

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• News & Views | 22 December 2023

  Engineering porous crystals to do different things

  An important but difficult separation, the removal of carbon monoxide from humid gas mixtures comprising oxygen, nitrogen and hydrocarbons, is addressed by exploiting Cu(I) coordination chemistry and framework flexibility.

  • Michael J. Zaworotko

• Article | 13 November 2023

  Quasi-open Cu(i) sites for efficient CO separation with high O₂/H₂O tolerance

  Chemical adsorption of CO on open metal sites enables separation from other gases but leads to selectivity and stability issues. Quasi-open metal sites in metal–organic frameworks are proposed here, which are accessible only by CO-induced structural transformation, enabling CO separation to 9N purity.

  • Xue-Wen Zhang
  • , Chao Wang
  •  & Jie-Peng Zhang