This content will become publicly available on January 1, 2025
- Award ID(s):
- 1846740
- NSF-PAR ID:
- 10501869
- Publisher / Repository:
- IEEE TBIOCAS
- Date Published:
- Journal Name:
- IEEE Transactions on Biomedical Circuits and Systems
- ISSN:
- 1932-4545
- Page Range / eLocation ID:
- 1 to 15
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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ABSTRACT Phosphonium‐containing polyelectrolyte networks (PENs) (
P1 –P4 ) were prepared by cyclotrimerization of bis(4‐acetylphenyl)diphenylphosphonium bromide (M1 ) and 1,4‐diacetylbenzene (M2 ) withp ‐toluene sulfonic acid in variousM1:M2 ratios (1,0, 1:1, 1:2, and 1:4). The relative abundance of the PAr4+units in each PEN was demonstrated to influence thermal stability, alkaline stability, water uptake, surface area, and CO2uptake in predictable ways. Impressively, PENs with NTf2−counterions (Tf = CF3SO3) did not exhibit 5% mass loss until heating above 400 °C. Alkaline stability, tested by challenging a PEN with 6M NaOH(aq ) at 65 °C for 120 h, increased with increasing PAr4+content, which reflected the enhanced reactivity of the HO−anion in more hydrophobic materials (i.e., PENs with lowerM1:M2 ratios). The specific surface areas estimated by Brunauer‐Emmett‐Teller (BET) analysis for these PENs were above 60 m2/g under N2and nearly 90 m2/g under CO2. Notably,P3 (in which 33% of monomers comprise a phosphonium moiety) exhibited a CO2uptake affinity of one CO2molecule adsorbed for every phosphonium site. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem.2019 ,57 , 598–604