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Near-infrared light induced cationic polymerization based on upconversion and ferrocenium photochemistry

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Abstract

A novel near-infrared (NIR) photoinitiating system for cationic polymerization using upconversion nanoparticles (UCNPs) and ferrocenium salts is reported. The UV-A and visible light emitted by the UCNPs upon NIR irradiation, absorbed by the ferrocenium salts, results in the liberation of aromatic ligand and thus the formed active Lewis acid can efficiently induce the cationic polymerization of oxirane and vinyl monomers. Notably, high “post polymerization” efficiency in dark (>30%) was observed which can compensate the limited upconversion fluorescence efficiency and lead to an improved and uniform conversion of the monomers.

Graphical abstract: Near-infrared light induced cationic polymerization based on upconversion and ferrocenium photochemistry

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Publication details

The article was received on 21 Aug 2019, accepted on 01 Oct 2019 and first published on 03 Oct 2019


Article type: Communication
DOI: 10.1039/C9PY01262A
Polym. Chem., 2019, Advance Article

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    Near-infrared light induced cationic polymerization based on upconversion and ferrocenium photochemistry

    X. Meng, H. Lu, Z. Li, C. Wang, R. Liu, X. Guan and Y. Yagci, Polym. Chem., 2019, Advance Article , DOI: 10.1039/C9PY01262A

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