The Effect of Polymerization of Ionic Liquid [C4Vim]Br on Phase Behavior and Partitioning of L-Tryptophan: Experimental and Molecular Dynamics Study

Petr A. Korchak; Evgenia A. Safonova; Igor Yu. Gotlib; and Alexey I. Victorov

doi:10.1007/s10118-026-3631-8

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The Effect of Polymerization of Ionic Liquid [C4Vim]Br on Phase Behavior and Partitioning of L-Tryptophan: Experimental and Molecular Dynamics Study

Updated：2026-04-15

- The Effect of Polymerization of Ionic Liquid [C4Vim]Br on Phase Behavior and Partitioning of L-Tryptophan: Experimental and Molecular Dynamics Study
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- The Effect of Polymerization of Ionic Liquid [C4Vim]Br on Phase Behavior and Partitioning of L-Tryptophan: Experimental and Molecular Dynamics Study
- 高分子科学（英文） 2026年44卷
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- DOI：10.1007/s10118-026-3631-8
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- 收稿：2026-01-04，
  
  修回：2026-02-08，
  
  录用：2026-02-23，
  
  纸质出版：2026
- Accepted：
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Petr A. Korchak, Evgenia A. Safonova, Igor Yu. Gotlib, 等. The Effect of Polymerization of Ionic Liquid [C4Vim]Br on Phase Behavior and Partitioning of L-Tryptophan: Experimental and Molecular Dynamics Study[J/OL]. 高分子科学（英文）, 2026,44.

Petr A. Korchak, Evgenia A. Safonova, Igor Yu. Gotlib, et al. The Effect of Polymerization of Ionic Liquid [C4Vim]Br on Phase Behavior and Partitioning of L-Tryptophan: Experimental and Molecular Dynamics Study[J/OL]. 2026, 44.
Petr A. Korchak, Evgenia A. Safonova, Igor Yu. Gotlib, 等. The Effect of Polymerization of Ionic Liquid [C4Vim]Br on Phase Behavior and Partitioning of L-Tryptophan: Experimental and Molecular Dynamics Study[J/OL]. 高分子科学（英文）, 2026,44. DOI： 10.1007/s10118-026-3631-8.

Petr A. Korchak, Evgenia A. Safonova, Igor Yu. Gotlib, et al. The Effect of Polymerization of Ionic Liquid [C4Vim]Br on Phase Behavior and Partitioning of L-Tryptophan: Experimental and Molecular Dynamics Study[J/OL]. 2026, 44. DOI： 10.1007/s10118-026-3631-8.

摘要

Abstract

In recent decades

there is growing interest in various applications of polymerized ionic liquids (PILs)

particularly in the aqueous biphasic systems (ABSs) used as media for extraction of solutes. In this work

we report new experimental data on the binodal curve and tie lines in the ABSs containing PIL and non-polymerized ionic liquid (IL): poly-[C4Vim]Br-K3PO4-H2O and [C4Vim]Br-K3PO4-H2O at 298.15 K. For the ABS with PIL

the partition coefficient of L-tryptophan between the liquid phases is obtained from experiment and compared with our previous data on ABS [C4mim]Br-K3PO4-H2O containing non-polymerized IL. We conclude that the ABS containing poly-[C4Vim]Br has a lower extraction efficiency than the ABS based on non-polymerized ILs. To elucidate the mechanism underlying such behavior of the PIL-containing mixture

we performed MD simulations of PIL-rich aqueous mixtures in presence of K3PO4 and L-tryptophan. We obtained diffusion coefficients of low molecular mass ions and water

and data on the distribution of these species around polycation over a range of mixture compositions. MD data show that poly-[C4Vim]Br exhibits no favorable selectivity towards L-tryptophan anions in the presence of phosphate background. This confirms unfavorable combination of poly-[C4Vim]Br with phosphate for the extraction of L-tryptophan

in accord with our experimental findings.

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