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Enabling High Throughput Kinetic Experimentation by Using Flow as a Differential Kinetic Technique.

Gavin Lennon1, Paul Dingwall1

  • 1School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Stranmillis Road, Belfast, BT9 5AG, UK.

Angewandte Chemie (International Ed. in English)
|December 11, 2023
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Summary

This study introduces a novel flow chemistry method for rapid, direct measurement of reaction rates, significantly increasing experimental throughput. This high-throughput kinetic screening accelerates chemical research and reduces material usage.

Keywords:
Aldol ReactionFlow ChemistryKineticsOrganocatalysis

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Area of Science:

  • Chemical kinetics
  • Flow chemistry
  • Reaction engineering

Background:

  • Kinetic data is crucial for understanding chemical reactions.
  • Traditional methods often involve time-series data collection under batch or flow conditions.
  • Existing flow methods primarily collect integral kinetic data, limiting direct rate measurement.

Purpose of the Study:

  • To develop a method for rapid, direct collection of differential kinetic data in flow.
  • To enable high-throughput kinetic experimentation and reaction profiling.
  • To assess the robustness of homogeneously catalyzed reactions using kinetic profiles.

Main Methods:

  • Utilizing a segmented flow platform for sequential, small-scale reactions.
  • Performing instantaneous rate measurements to generate differential kinetic data.
  • Comparing kinetic profiles at varying residence times to evaluate reaction stability.

Main Results:

  • Demonstrated a method for direct differential kinetic data collection in flow.
  • Achieved a 40-fold increase in experimental throughput compared to batch methods.
  • Successfully screened 216 kinetic profiles for a proline-mediated aldol reaction in 90 hours.

Conclusions:

  • The developed method significantly enhances the speed and efficiency of kinetic studies.
  • This approach allows for robust interrogation of reaction stability under flow conditions.
  • High-throughput kinetic screening in flow reduces reaction times and material consumption.