Ammonia Storage in Hydrogen Bond-Rich Microporous Polymers
| Autor: | Gokhan Barin, Victoria García Sakai, Dasol Hwang, Juergen Eckert, Heloisa N. Bordallo, Mark T. F. Telling, Ji-Woong Lee, D. V. Okhrimenko, Svemir Rudić, Rodrigo J S Lima |
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| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Thermogravimetric analysis Materials science Hydrogen Hydrogen bond chemistry.chemical_element 02 engineering and technology Polymer Microporous material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Adsorption chemistry Chemical engineering Molecule General Materials Science 0210 nano-technology Imide |
| Zdroj: | ACS applied materialsinterfaces. 12(52) |
| ISSN: | 1944-8252 |
| Popis: | The fascinating structural flexibility of porous polymers is highly attractive because it can result in optimized materials with specific host-guest interactions. Nevertheless, the fundamental mechanisms responsible for controlling the weak interactions of these hydrogen bond-rich networks-essential for developing smart task-specific materials used in recognition, capture, and sequestration processes-remain unexplored. Herein, by systematically comparing performance changes between poly(amic acid) (PAA)- and polycyclic imide (PI)-based porous polymers before and after NH3 adsorption, the role of hydrogen bonds in conformational lability and responsiveness toward guest molecules is highlighted. By combining thermal gravimetric analysis with neutron spectroscopy supported by DFT calculations, we demonstrate that PAA's chemical and physical stability is enhanced by the presence of stronger host-guest interactions. This observation also emphasizes the idea that efficient adsorption relies on having a high number of sites, upon which gas molecules can adsorb with greater affinity via strong hydrogen bonding interactions. |
| Databáze: | OpenAIRE |
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