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Ionization-controlled chain organization and water structuring in weak polyelectrolytes
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DOI：10.1016/j.colsurfa.2026.140746.png)
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Abstract
En 中文
• PAA exhibits a non-linear globule-to-coil transition driven by ionization degree. • Surface potential shifts from dipole to charge dominance during deprotonation. • Mg2+ ions stabilize coiled states via salt-bridges in secondary hydration layers. • Hierarchical double-layer hydration shells are formed around carboxylate groups. • Bound water shows prolonged residence times and a spatial gradient of diffusion.
Keywords:
ionization degree
polyelectrolyte conformation
hydration shells
water dynamics
salt-bridges
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