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Utilization of Stop-flow Micro-tubing Reactors for the Development of Organic Transformations

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Continuous Heterogeneous Photocatalysis in Serial Micro-Batch Reactors.

Bartholomäus Pieber¹, Menny Shalom^2,3, Markus Antonietti²

¹Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476, Potsdam, Germany.

Angewandte Chemie (International Ed. in English)

|January 30, 2018

Summary

Serial micro-batch reactors enable continuous flow photocatalysis using solid catalysts. This sustainable approach utilizes inexpensive, recyclable graphitic carbon nitride for efficient fluorination reactions.

Keywords:

carbon nitrides flow chemistry fluorination heterogeneous catalysis photocatalysis

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Area of Science:

Chemical Engineering
Materials Science
Organic Chemistry

Background:

Traditional batch processes struggle with continuous flow chemistry for solid reagents and heterogeneous catalysts.
Packed-bed reactors are unsuitable for light-dependent photocatalysis due to light penetration limitations.
Existing photocatalysts often involve expensive homogeneous metal complexes.

Purpose of the Study:

To develop a continuous-flow system for heterogeneous photocatalysis using solid materials.
To demonstrate the efficacy of serial micro-batch reactors (SMBRs) for flow chemistry.
To create a sustainable and scalable photocatalytic fluorination method.

Main Methods:

Utilized serial micro-batch reactors (SMBRs) for continuous processing of solid catalysts with liquid and gas phases.
Employed a modified graphitic carbon nitride as a heterogeneous photocatalyst.
Developed selective and efficient fluorination reactions under flow conditions.

Main Results:

SMBRs successfully enabled continuous utilization of solid heterogeneous photocatalysts in flow.
The modified graphitic carbon nitride catalyst proved effective for fluorination reactions.
The developed system demonstrated selectivity and efficiency, outperforming traditional methods.

Conclusions:

Serial micro-batch reactors are a viable technology for continuous heterogeneous photocatalysis.
Inexpensive, recyclable graphitic carbon nitride offers a sustainable alternative to costly homogeneous catalysts.
This integrated approach facilitates scalable and eco-friendly photocatalytic synthesis.