A Microporous Amic Acid Polymer for Enhanced Ammonia Capture
| Autor: | Ji-Woong Lee, Gregory W. Peterson, Jun Xu, Gokhan Barin, Kristen A. Colwell, Jeffrey R. Long |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Materials science 02 engineering and technology Microporous material Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Methane 0104 chemical sciences chemistry.chemical_compound Ammonia Adsorption chemistry Yield (chemistry) Organic chemistry General Materials Science 0210 nano-technology Imide Porosity |
| Zdroj: | ACS Applied Materials & Interfaces. 9:33504-33510 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.7b02603 |
| Popis: | Amic acids, consisting of carboxylic acids and amides, are often utilized as intermediates that can further undergo a dehydration–cyclization step to yield polymeric cyclic imides. Compared with imide-based materials, the presence of Bronsted acidic groups and multiple hydrogen-bond donors and acceptors in materials incorporating amic acids opens up the possibility for a variety of host–guest interactions. Here we report a facile and catalyst-free synthesis of a Bronsted acidic porous poly(amic acid) (PAA) and present its NH3 uptake properties using gas adsorption and breakthrough measurements. Simple addition of water as a cosolvent to a mixture of tetrakis(4-aminophenyl)methane and pyromellitic anhydride resulted in the formation of PAA in almost quantitative yield. Further mechanistic studies with model compounds revealed the importance of additive water to generate amic acid species selectively without forming cyclic imides at high temperatures. Gas adsorption isotherms and breakthrough curves obtaine... |
| Databáze: | OpenAIRE |
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