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Ion transport in helical-helical polypeptide polymerized ionic liquid block copolymers

Author

Listed:
  • Yingying Chen

    (University of Illinois Urbana-Champaign)

  • Tianjian Yang

    (University of Connecticut)

  • Yao Lin

    (University of Connecticut)

  • Christopher M. Evans

    (University of Illinois Urbana-Champaign)

Abstract

Helical-helical polypeptide polymerized ionic liquid block copolymers (PPIL BCPs) are synthesized to investigate the role of helical structure on self-assembly and ionic conductivity. PPIL BCPs, consisting of a cationic polypeptide (PTPLG) with bis(trifluoromethane sulfonimide) (TFSI) counterion and varying lengths connected to a length-fixed neutral poly-(γ-benzyl-L-glutamate) (PBLG) block, exhibit stable helical conformations with minimal glass transition (Tg) variation. Here, we show that increasing PIL composition leads to a transition from poorly ordered to highly ordered lamellar (LAM) structures with the highest PIL content BCP forming a bilayer LAM structure with close-packed helices. This morphology yields a 1.5 order of magnitude higher Tg- and volume fraction-normalized ionic conductivity and a morphology factor f > 0.8 compared to less ordered BCPs with f

Suggested Citation

  • Yingying Chen & Tianjian Yang & Yao Lin & Christopher M. Evans, 2025. "Ion transport in helical-helical polypeptide polymerized ionic liquid block copolymers," Nature Communications, Nature, vol. 16(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-57784-9
    DOI: 10.1038/s41467-025-57784-9
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    References listed on IDEAS

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    1. Tan P. Nguyen & Alexandra D. Easley & Nari Kang & Sarosh Khan & Soon-Mi Lim & Yohannes H. Rezenom & Shaoyang Wang & David K. Tran & Jingwei Fan & Rachel A. Letteri & Xun He & Lu Su & Cheng-Han Yu & Jo, 2021. "Polypeptide organic radical batteries," Nature, Nature, vol. 593(7857), pages 61-66, May.
    2. Yivan Jiang & Jessica L. Freyer & Pepa Cotanda & Spencer D. Brucks & Kato L. Killops & Jeffrey S. Bandar & Christopher Torsitano & Nitash P. Balsara & Tristan H. Lambert & Luis M. Campos, 2015. "The evolution of cyclopropenium ions into functional polyelectrolytes," Nature Communications, Nature, vol. 6(1), pages 1-7, May.
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