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Mesoporous Graphitic Carbon Nitride As A Heterogeneous Visible Light Photoinitiator For Radical Polymerization

B. Kışkan, J. Zhang, X. Wang, M. Antonietti, Y. Yagci
Published 2012 · Materials Science

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The use mesoporous graphitic carbon nitride (mpg-C3N4) in conjunction with tertiary amines as initiators in visible-light-induced free radical polymerization is described. The initiation mechanism involves photoinduced free radical generation by scavenging holes with amines and subsequent hydrogen abstraction. The efficiency of the photoinitiation is controlled by the nature of the amines and specific surface area of the carbon nitride powder. Apparently, amines with higher basicity and available hydrogens provide more favorable conditions for the photoinitiation process. Due to its heterogeneous nature, the photoinitiator preserves its photoinitiation activity after the polymerization and can easily be separated and used for further polymerizations.
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