Metal-organic frameworks are promising materials for O2/N2 separations from air, with previously published examples exhibiting high selectivities. However, there remains a need for materials with high O2 capacities, high binding affinities for O2, and facile cyclability under mild conditions. In the course of studying cobalt(II) frameworks, we found that in tuning the coordination environment by varying the anion identity, the binding strength to O2 can be greatly enhanced. With in situ infrared spectroscopy, in situ powder X-ray diffraction, and in situ powder neutron diffraction, we are able to confirm the binding of O2 as cobalt-superoxo species in the materials studied, and in addition, they display unusual O2 binding properties reminiscent of those seen in proteins.

Exploring O<sub>2</sub> adsorption in cobalt triazolate frameworks

2019 Fall National Meeting

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Exploring O2 adsorption in cobalt triazolate frameworks

Exploring O₂ adsorption in cobalt triazolate frameworks