Efficient Synthesis of High-Performance Anion Exchange Membranes by Applying Clickable Tetrakis(dialkylamino)phosphonium Cations
Tetrakis(dialkylamino)phosphonium (TKDAAP) compounds exhibit extraordinary base resistance, a prerequisite feature for high-performance anion exchange membranes (AEMs). It is, however, challenging to synthesize a TKDAAP compound with reactive functionality that can be used to link the cation to a po...
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| Format: | Article |
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MDPI AG
2023-01-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/2/352 |
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| author | Yu Wang Yudong Wang Sushant Sahu August A. Gallo Xiao-Dong Zhou |
| author_facet | Yu Wang Yudong Wang Sushant Sahu August A. Gallo Xiao-Dong Zhou |
| author_sort | Yu Wang |
| collection | DOAJ |
| description | Tetrakis(dialkylamino)phosphonium (TKDAAP) compounds exhibit extraordinary base resistance, a prerequisite feature for high-performance anion exchange membranes (AEMs). It is, however, challenging to synthesize a TKDAAP compound with reactive functionality that can be used to link the cation to a polymer backbone. In this study, two TKDAAP compounds with alkyne functionality were synthesized and incorporated into an azide-modified SBS triblock copolymer backbone via Cu(I)-catalyzed alkyne–azide cycloaddition (CuAAC) “click” chemistry. The properties of the resulting AEMs were characterized. It was found that (1) the triazole linker between the cation and the polymer backbone was stable under alkaline conditions; (2) varying the substituents of TKDAAP compounds could dramatically alter the stability; and (3) increasing the hydrophilicity of the AEM was an efficient way to enhance its ionic conductivity. Using clickable TKDAAP compounds makes it easy to combine various cations into polymer backbones with adjustable cation content, thus potentially leading to an efficient way to screen a wide variety of polyelectrolyte structures to identify the most promising candidates for high-performance AEMs. |
| first_indexed | 2024-03-09T11:23:05Z |
| format | Article |
| id | doaj.art-1bfee02b7b354fc88f781d95268226e2 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T11:23:05Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-1bfee02b7b354fc88f781d95268226e22023-12-01T00:08:35ZengMDPI AGPolymers2073-43602023-01-0115235210.3390/polym15020352Efficient Synthesis of High-Performance Anion Exchange Membranes by Applying Clickable Tetrakis(dialkylamino)phosphonium CationsYu Wang0Yudong Wang1Sushant Sahu2August A. Gallo3Xiao-Dong Zhou4Department of Chemistry, University of Louisiana at Lafayette, Lafayette, LA 70504, USAInstitute for Materials Research and Innovation, University of Louisiana at Lafayette, Lafayette, LA 70504, USADepartment of Chemistry, University of Louisiana at Lafayette, Lafayette, LA 70504, USADepartment of Chemistry, University of Louisiana at Lafayette, Lafayette, LA 70504, USAInstitute for Materials Research and Innovation, University of Louisiana at Lafayette, Lafayette, LA 70504, USATetrakis(dialkylamino)phosphonium (TKDAAP) compounds exhibit extraordinary base resistance, a prerequisite feature for high-performance anion exchange membranes (AEMs). It is, however, challenging to synthesize a TKDAAP compound with reactive functionality that can be used to link the cation to a polymer backbone. In this study, two TKDAAP compounds with alkyne functionality were synthesized and incorporated into an azide-modified SBS triblock copolymer backbone via Cu(I)-catalyzed alkyne–azide cycloaddition (CuAAC) “click” chemistry. The properties of the resulting AEMs were characterized. It was found that (1) the triazole linker between the cation and the polymer backbone was stable under alkaline conditions; (2) varying the substituents of TKDAAP compounds could dramatically alter the stability; and (3) increasing the hydrophilicity of the AEM was an efficient way to enhance its ionic conductivity. Using clickable TKDAAP compounds makes it easy to combine various cations into polymer backbones with adjustable cation content, thus potentially leading to an efficient way to screen a wide variety of polyelectrolyte structures to identify the most promising candidates for high-performance AEMs.https://www.mdpi.com/2073-4360/15/2/352anion exchange membraneAEMtetrakis(dialkylamino)phosphonium“click” chemistry |
| spellingShingle | Yu Wang Yudong Wang Sushant Sahu August A. Gallo Xiao-Dong Zhou Efficient Synthesis of High-Performance Anion Exchange Membranes by Applying Clickable Tetrakis(dialkylamino)phosphonium Cations Polymers anion exchange membrane AEM tetrakis(dialkylamino)phosphonium “click” chemistry |
| title | Efficient Synthesis of High-Performance Anion Exchange Membranes by Applying Clickable Tetrakis(dialkylamino)phosphonium Cations |
| title_full | Efficient Synthesis of High-Performance Anion Exchange Membranes by Applying Clickable Tetrakis(dialkylamino)phosphonium Cations |
| title_fullStr | Efficient Synthesis of High-Performance Anion Exchange Membranes by Applying Clickable Tetrakis(dialkylamino)phosphonium Cations |
| title_full_unstemmed | Efficient Synthesis of High-Performance Anion Exchange Membranes by Applying Clickable Tetrakis(dialkylamino)phosphonium Cations |
| title_short | Efficient Synthesis of High-Performance Anion Exchange Membranes by Applying Clickable Tetrakis(dialkylamino)phosphonium Cations |
| title_sort | efficient synthesis of high performance anion exchange membranes by applying clickable tetrakis dialkylamino phosphonium cations |
| topic | anion exchange membrane AEM tetrakis(dialkylamino)phosphonium “click” chemistry |
| url | https://www.mdpi.com/2073-4360/15/2/352 |
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