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Updated: Jun 20, 2026
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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
Ionic liquids as performance additives for electroenzymatic syntheses
Christina Kohlmann1, Lasse Greiner, Walter Leitner
1Institute of Biotechnology 2, Forschungszentrum Jülich, 52425 Jülich, Germany.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|September 25, 2009
Summary
Ionic liquids enhance electroenzymatic syntheses by improving conductivity and biocatalyst performance. These additives significantly boost space-time yield and catalyst utilization in key synthetic applications.
Area of Science:
- Biocatalysis
- Electrochemistry
- Green Chemistry
Background:
- Electroenzymatic syntheses integrate enzyme catalysis with electrochemical reactant regeneration.
- Limitations in conductivity, enzyme stability, and substrate solubility hinder current electroenzymatic processes.
- Ionic liquids (ILs) show potential as performance-enhancing additives in these systems.
Purpose of the Study:
- To investigate the impact of various water-miscible ionic liquids on electroenzymatic synthesis parameters.
- To identify effective ILs for improving conductivity, biocatalyst activity, stability, and substrate solubility.
- To evaluate the preparative-scale application of IL-enhanced electroenzymatic systems.
Main Methods:
- Screening of water-miscible ionic liquids for compatibility with electroenzymatic reactions.
- Assessment of ILs' effects on conductivity, enzyme activity, and stability.
- Application of selected ILs as additives in batch electrolyses for NADPH regeneration, amino acid resolution, and sulfoxide synthesis.
Main Results:
- Ionic liquids were identified as effective additives for improving critical parameters in electroenzymatic syntheses.
- Space-time yield for electrochemical nicotinamide adenine dinucleotide phosphate (NADPH) regeneration improved threefold.
- Amino acid oxidase-catalyzed methionine resolution showed a 50% increase in space-time yield and 140% increase in catalyst utilization.
- Chloroperoxidase-catalyzed synthesis of (R)-phenylmethylsulfoxide achieved up to a 4.2-fold improvement in space-time yield and catalyst utilization.
Conclusions:
- Water-miscible ionic liquids are valuable additives for advancing electroenzymatic syntheses.
- ILs can overcome key limitations, leading to significant improvements in reaction efficiency and catalyst performance.
- The study demonstrates the successful application of IL-enhanced electroenzymatic processes on a preparative scale.
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