As a newly-developed approach of controlled radical polymerization (CRP), reversible complexation mediated polymerization (RCMP) was established in 2011 by Goto et al., using iodine as a capping agent and organic...
Iron-based
catalysts for atom-transfer radical polymerization (ATRP)
are attractive in the sustainability aspects of green polymer chemistry
but usually exhibit lower efficiency and controllability over the
polymerization, as well as poorer tolerance to polar groups, compared
to copper catalysts. Herein, β-ketamine/iron complexes, combining
a strategy employing in situ generated iodine as a regulator, have
been developed for improving the efficiency and robustness of iron-catalyzed
ATRP. The catalyst system realizes low catalyst loading, ultrahigh
molecular weight, robustness over polar groups, efficient polymerization
of acrylate, and forthrightly synthesizing block copolymers, which
are challengeable for common iron catalysts. A mechanism was proposed
based on experimental results, which mainly involves the ATRP activation
process by Fe(II) and the I2-mediated deactivation process.
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