AI Article Synopsis
- - Azacalixphyrins are special compounds that can absorb light in the visible to near-infrared (NIR) range, making them useful for certain chemical reactions.
- - Research shows that a specific type of azacalixphyrin (ACP) can generate carbon-centered radicals, which are essential for initiating free-radical photopolymerization of bio-based acrylate monomers when exposed to various LED lights (455 to 660 nm).
- - A key benefit of using ACP is that it can start photopolymerization on its own without needing additional co-initiators, and the study also explores its use for creating precise microstructures with an NIR laser at 800 nm.
Article Abstract
Azacalixphyrins are unique aromatic macrocycles featuring strong absorption from the visible to the near-infrared (NIR) spectral ranges. This work demonstrates through EPR spin-trapping experiments that the -alkyl tetrasubstituted azacalixphyrin (ACP) can lead to the formation of carbon-centered radicals initiating for the free-radical photopolymerization (FRP) of bio-based acrylate monomer upon the irradiation of several light emitting diodes, which emissions range from 455 to 660 nm. Compared to other previously reported systems, the tremendous advantage of the ACP photoinitiating system is its ability to promote photopolymerization on its own, avoiding the introduction of co-initiators. A new potential application of this promising photoinitiator is highlighted through the fabrication of well-defined microstructures under NIR laser diode irradiation at = 800 nm.
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| http://dx.doi.org/10.1039/d1cc03607f | DOI Listing |
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