Microfluidic Thread-Based Analytical Platform for Reaction Screening Enabled by In Situ Thread Spray Mass...

Area of Science:

• Analytical Chemistry
• Organic Chemistry
• Chemical Engineering

Background:

• Organic reaction screening is crucial for drug discovery.
• Microfluidic devices offer advantages like reduced reagent use and faster analysis.
• Continuous monitoring is key for understanding reaction dynamics.

Purpose of the Study:

• To develop a microfluidic thread-based analytical device (μTAD) for in situ mass spectrometric analysis.
• To enable continuous flow reaction monitoring and organic reaction screening.
• To investigate the factors influencing reactivity in the μTAD platform.

Main Methods:

• Fabrication of a Y-shaped μTAD platform using cellulose thread and a glass slide.
• Introduction of multiple reactants through individual channels/reservoirs.
• In situ mass spectrometric analysis of reaction products on the thread substrate.

Main Results:

• The μTAD platform demonstrated effective mixing and controlled solvent evaporation, accelerating reactions.
• Successful monitoring of Katritzky chemistry, aza-Michael addition, and Mannich reactions.
• Identified effective mixing and solvent evaporation as key factors influencing reactivity.

Conclusions:

• The μTAD is a rapid, efficient, and low-cost platform for organic reaction monitoring.
• It offers a potential alternative to traditional batch screening methods.
• The platform facilitates direct characterization of reaction products via mass spectrometry.