Negative cooperativity upon hydrogen bond-stabilized O2 adsorption in a redox-active metal-organic framework
| Autor: | Harriet Li, Benjamin A. Trump, Jeffrey R. Long, Douglas A. Reed, Laura Gagliardi, Kristen A. Colwell, Henry Z. H. Jiang, Craig M. Brown, Julia Oktawiec, Varinia Bernales, Lucy E. Darago, Jenny G. Vitillo, Hiroyasu Furukawa |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Coordination sphere
Science General Physics and Astronomy chemistry.chemical_element 02 engineering and technology 010402 general chemistry Photochemistry 01 natural sciences General Biochemistry Genetics and Molecular Biology Article Metal Electron transfer Adsorption Electronic effect lcsh:Science Multidisciplinary Hydrogen bond General Chemistry Metal-organic frameworks 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry visual_art visual_art.visual_art_medium Metal-organic framework lcsh:Q Materials chemistry 0210 nano-technology Cobalt Inorganic chemistry |
| Zdroj: | Nature communications, vol 11, iss 1 Nature Communications Nature Communications, Vol 11, Iss 1, Pp 1-11 (2020) |
| Popis: | The design of stable adsorbents capable of selectively capturing dioxygen with a high reversible capacity is a crucial goal in functional materials development. Drawing inspiration from biological O2 carriers, we demonstrate that coupling metal-based electron transfer with secondary coordination sphere effects in the metal–organic framework Co2(OH)2(bbta) (H2bbta = 1H,5H-benzo(1,2-d:4,5-d′)bistriazole) leads to strong and reversible adsorption of O2. In particular, moderate-strength hydrogen bonding stabilizes a cobalt(III)-superoxo species formed upon O2 adsorption. Notably, O2-binding in this material weakens as a function of loading, as a result of negative cooperativity arising from electronic effects within the extended framework lattice. This unprecedented behavior extends the tunable properties that can be used to design metal–organic frameworks for adsorption-based applications. Oxygen capture is attractive for catalysis, sensing, and separations, but engineering stable and selective adsorbents is challenging. Here the authors combine metal-based electron transfer with secondary coordination sphere effects in a metal-organic framework, leading to strong and reversible O2 adsorption that also exhibits negative cooperativity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|