Poly(alkyl-biphenyl pyridinium) anion exchange membranes with a hydrophobic side chain for mono-/divalent anion separation

Yang, Huiling; Afsar, Noor Ul; Chen, Qian; Ge, Xiaolin; Li, Xingya; Ge, Liang; Xu, Tongwen

doi:10.1039/d2im00043a

Cited by 12 publications

(4 citation statements)

References 42 publications

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“…The binary selectivity based on the ionic conductivity is concluded in Figures f and S18, showing the specific Cl – selectivity toward other anions. The specific selectivity is contributed by the halogen bond between Cl – and pronated pyridine, as well as the differences in hydrated radium and the Gibbs free energy of hydration …”

Section: Resultsmentioning

confidence: 99%

“…The specific selectivity is contributed by the halogen bond between Cl − and pronated pyridine, as well as the differences in hydrated radium and the Gibbs free energy of hydration. 35 Mechanosensitive Response toward Pressure-Induced Deformation. The EMC membranes experience dramatic and reversible deformation under a tiny pressure, changing the nanochannel shape and further inducing an electrochemical response.…”

Section: ■ Introductionmentioning

confidence: 99%

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Ultra-mechanosensitive Chloride Ion Transport through Bioinspired High-Density Elastomeric Nanochannels

Li,

Liu,

Zhi

et al. 2023

J. Am. Chem. Soc.

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Mechanosensitive ion channels play crucial roles in physiological activities, where small mechanical stimuli induce the membrane tension, trigger the ion channels’ deformation, and are further transformed into significant electrochemical signals. Artificial ion channels with stiff moduli have been developed to mimic mechanosensory behaviors, exhibiting an electrochemical response by the high-pressure-induced flow. However, fabricating flexible mechanosensitive channels capable of regulating specific ion transporting upon dramatic deformation has remained a challenge. Here, we demonstrate bioinspired high-density elastomeric channels self-assembled by polyisoprene-b-poly4-vinylpyridine, which exhibit ultra-mechanosensitive chloride ion transport resulting from nanochannel deformation. The PI-formed continuous elastic matrix can transmit external forces into internal tensions, while P4VP forms transmembrane chloride channels that undergo dramatic deformation and respond to mechanical stimuli. The integrated and flexible chloride channels present a dramatic and stable electrochemical signal toward a low pressure of 0.2 mbar. This research first demonstrates the artificial mechanosensory chloride channels, which could provide a promising avenue for designing flexible and responsive channel systems.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Ultra-mechanosensitive Chloride Ion Transport through Bioinspired High-Density Elastomeric Nanochannels

Li,

Liu,

Zhi

et al. 2023

J. Am. Chem. Soc.

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show abstract

“…In order to distinguish the final product and the intermediate PAB, the final product was marked as QPAB- x , where Q referred to quaternization and x referred to the molar ratio of n -bromopentane to PAB. 23 Reiter et al synthesized siloxane-based PIL via post-polymerization modification of commercially available polysiloxane derivatives, as shown in Fig. 4c.…”

Section: Synthesismentioning

confidence: 99%

Poly(ionic liquid)s: an emerging platform for green chemistry

Zhu,

Yang

2024

Green Chem.

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“…Electrodialysis (ED) holds great potential for water-related separations and treatment processes, contributing to “no-phase transition” and low chemical/energy consumption. , Cation exchange membranes (CEMs) efficiently separate cations/anions according to the Donnan effect . However, when multiple different or equal valency ions preferentially permeate in the solution, as a crucial component of ED, traditional CEMs struggle to meet the requirements for separating monovalent/multivalent ions.…”

Section: Introductionmentioning

confidence: 99%

Cation Exchange Membrane with Internal-Blocking Sites for Mono/Multivalent Ion Separation

Zhao,

Sun,

Zhao

et al. 2024

ACS EST Water

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In this work, monovalent cation perm-selective membranes (MCPMs) with multiple internal-blocking sites were designed to enhance the Donnan effect and size-based exclusion effect. Polypyrrole (PPy), as the internal-blocking sites for ion transport, was introduced within the membrane matrix by in situ polymerization, which was prominent to mono-and multivalent ion separation in electrodialysis (ED). The precise growth of the internal-blocking sites was manipulated via optimization of the polymerization time and polymerization steps. The optimized SPPSU@3PPy membrane exhibits excellent separation performance: the SPPSU@3PPy membrane demonstrates perm-selectivity for Na + /Mg 2+ (PNa Mg = 2.08) and a higher Na + flux (J Na + = 3.29 × 10 −8 mol cm −2 s −1 ). This in situ polymerization method to fabricate internal-blocking sites in a cation exchange membrane is a potential pathway to construct MCPMs.

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Poly(alkyl-biphenyl pyridinium) anion exchange membranes with a hydrophobic side chain for mono-/divalent anion separation

Abstract: A series of poly(alkyl-biphenyl pyridinium) anion exchange membranes (AEMs) with a hydrophobic side chain were prepared for mono-/divalent anions separation using electrodialysis (ED). Poly(alkyl-biphenyl pyridinium) polymer was synthesized via superacid-catalyzed...

Cited by 12 publications

References 42 publications

Ultra-mechanosensitive Chloride Ion Transport through Bioinspired High-Density Elastomeric Nanochannels

Ultra-mechanosensitive Chloride Ion Transport through Bioinspired High-Density Elastomeric Nanochannels

Poly(ionic liquid)s: an emerging platform for green chemistry

Cation Exchange Membrane with Internal-Blocking Sites for Mono/Multivalent Ion Separation

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