Nanofiber Mats as Amine-Functionalized Heterogeneous Catalysts in Continuous Microfluidic Reactor Systems
Katja Rumpke, Naresh Killi, Barbara Dittrich, Andreas Herrmann, Dirk Kuckling
TL;DR
Researchers developed amine-functionalized nanofiber mats as efficient catalysts in microfluidic reactors for sustainable chemical synthesis.
Contribution
A novel electrospun, photo-crosslinked nanofiber catalyst system for microfluidic Knoevenagel reactions is introduced.
Findings
NMR yields of 40–60% and turnover frequencies of 50–80 h−1 were achieved in Knoevenagel reactions.
The catalyst system showed reproducible performance over three reaction cycles.
Abstract
The development of sustainable catalysts is the main objective in green chemistry approaches. In this study, a catalytically active polymer based on a tertiary amine was synthesized, functionalized with a photo-crosslinker, and structured into nanofibers via electrospinning technique with polycaprolactone (PCL) as a stabilizing additive. Subsequent photo-crosslinking yielded hierarchically porous polymers with high swelling properties and increased surface areas, thereby improving the accessibility of the immobilized catalytically active sites. The nanofiber mats were incorporated into a microfluidic reactor (MFR) setup and utilized as heterogeneous catalysts for the Knoevenagel reaction of malononitrile with different aldehydes. It was observed that the system demonstrated a substantial improvement in NMR yields (40–60%) and turnover frequencies (50–80 h−1) in comparison to catalytical…
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Taxonomy
TopicsMulticomponent Synthesis of Heterocycles · Innovative Microfluidic and Catalytic Techniques Innovation · Nanomaterials for catalytic reactions