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Updated: Feb 13, 2026
10:42
Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
Published on: August 10, 2016
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[Dihydroquercetin polymerization using laccase immobilized into an ionic liquid]
Prikladnaia Biokhimiia I Mikrobiologiia
|March 8, 2018
Summary
Laccase (LC) in hydrophobic ionic liquid (IL) enables reusable dihydroquercetin (DHQ) biotransformation. Synthesized DHQ oligomers retain physicochemical properties and show enhanced antioxidant activity compared to the monomer.
Area of Science:
- Biocatalysis and Green Chemistry
- Polymer Science
- Antioxidant Research
Background:
- Enzymatic biotransformations offer sustainable routes for synthesizing valuable compounds.
- Ionic liquids (ILs) are explored as novel media for enzyme immobilization and reuse.
- Dihydroquercetin (DHQ) is a natural antioxidant with potential applications.
Purpose of the Study:
- To investigate the reusability of laccase (LC) immobilized in a hydrophobic ionic liquid (IL) for dihydroquercetin (DHQ) oligomer synthesis.
- To characterize the physicochemical properties of DHQ oligomers produced using the LC/IL system.
- To evaluate the antioxidant activity of the synthesized DHQ oligomers.
Main Methods:
- Immobilization of laccase in a hydrophobic ionic liquid.
- Enzymatic oligomerization of dihydroquercetin using the immobilized laccase.
- Physicochemical characterization of synthesized DHQ oligomers (molecular weight, polydispersity index).
- Assessment of antioxidant activity of DHQ oligomers and monomer.
Main Results:
- Laccase immobilized in hydrophobic ionic liquid demonstrated reusability for DHQ biotransformation.
- Physicochemical characteristics of DHQ oligomers synthesized via LC/IL were comparable to those obtained with native laccase.
- The synthesized DHQ oligomers exhibited a number average molecular weight of 1050 g/mol and a polydispersity index of 1.41.
- DHQ oligomers displayed significantly higher antioxidant activity than the DHQ monomer.
Conclusions:
- Hydrophobic ionic liquids provide a viable medium for reusable laccase in DHQ oligomer synthesis.
- The LC/IL system efficiently produces DHQ oligomers with desirable physicochemical properties.
- Synthesized DHQ oligomers represent a promising class of compounds with enhanced antioxidant potential.
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