4.6 Article

Highly selective carbon dioxide adsorption on exposed magnesium metals in a cross-linked organo-magnesium complex

Journal

JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 33, Pages 13534-13540

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta01364f

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Funding

  1. NUS
  2. POC grant from National Research Foundation of Singapore
  3. Singapore Ministry of Education
  4. National Natural Science Foundation of China [21233006]

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A cross-linked organo-magnesium complex (MTF-Mg) was synthesized and investigated for selective CO2 adsorption over N-2 at 298 K. Remarkably high selectivity and reversibility were achieved with an isosteric heat of adsorption of 45.2 kJ mol(-1) for CO2, consistent with the predicted DFT value of 37.3 kJ mol(-1). The CO2 preferential adsorption arises from its strong interaction with the exposed magnesium atoms.

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