Efficient construction of superior poly(ionic liquid) hydrogels for promising application in HPLC analysis

Area of Science:

• Analytical Chemistry
• Materials Science
• Separation Science

Background:

• Growing demand for enhanced chromatographic resolution necessitates novel stationary phases.
• Poly(ionic liquid)s and polymer hydrogels offer versatile functional materials for chromatographic applications.
• Combining these materials can create advanced stationary phases with tailored properties.

Purpose of the Study:

• To synthesize and evaluate a novel poly(ionic liquid) hydrogel-modified stationary phase (Sil-PHA).
• To investigate the synergistic effects of poly(ionic liquid)s and hydrogels for enhanced chromatographic separations.
• To demonstrate the broad applicability of the Sil-PHA for separating diverse analytes.

Main Methods:

• Synthesis of a poly([HDVIM]Br-co-AA) hydrogel via thiol-ene click polymerization.
• Modification of a silica-based stationary phase with the synthesized hydrogel (Sil-PHA).
• Systematic evaluation of the Sil-PHA's chromatographic separation capabilities.

Main Results:

• The Sil-PHA exhibits a hydrophobicity/hydrophilicity balance due to synergistic poly(ionic liquid) and hydrogel effects.
• Effective separation of hydrophilic nucleosides and diverse hydrophobic aromatic compounds (alkylphenols, alkylbenzenes, phthalates, PAHs, bisphenols, aromatic ketones) was achieved.
• The Sil-PHA demonstrates superior selectivity and broader applicability compared to conventional stationary phases.

Conclusions:

• Poly(ionic liquid) hydrogels represent a transformative class of materials for chromatographic science.
• The Sil-PHA offers a new material platform for high-performance separation of diverse samples.
• This study pioneers an innovative approach for constructing multifunctional chromatographic separation systems.