Visible Light Mediated Controlled Radical Polymerization in the Absence of Exogenous Radical Sources or Catalysts
Thomas G McKenzie, Qiang Fu, Edgar HH Wong, Dave E Dunstan, Greg G Qiao
MACROMOLECULES | AMER CHEMICAL SOC | Published : 2015
The application of external stimuli such as light to induce controlled radical polymerization reactions has important implications in the field of materials science. In this study, the photoactivation of trithiocarbonates (TTCs) (i.e., conventional RAFT agents) by visible light (-460 nm) is investigated, and the ability of TTCs to control radical polymerization under visible light in the complete absence of exogenous photoinitiators or catalysts is demonstrated for the first time. By selectively exciting the spin-forbidden n → electronic transition, polyacrylates and polyacrylamides of low dispersity and high end group fidelity were obtained. In addition, this approach allows for the efficie..View full abstract
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Awarded by Australian Research Council via Future Fellowship
The authors acknowledge Kyra Schwarz and Professor Ken Ghiggino from the Ultrafast and Microspectroscopy Laboratories Group, The University of Melbourne, for assistance with light source characterization. The authors also acknowledge financial support from the Australian Research Council via the Future Fellowship (FT110100411, G.G.Q) scheme. T.M. is the recipient of an Australian Postgraduate Award (APA).