mz7b00909_si_001.pdf (330.25 kB)
Direct ATRP of Methacrylic Acid with Iron-Porphyrin Based Catalysts
journal contribution
posted on 2017-12-14, 20:06 authored by Liye Fu, Antonina Simakova, Marco Fantin, Yi Wang, Krzysztof MatyjaszewskiAn
iron porphyrin catalyst, derived from the active center of proteins
such as horseradish peroxidase and hemoglobin, was successfully used
for the atom transfer radical polymerizations (ATRP) of methacrylic
acid. ATRP of methacrylic acid and other acidic monomers is challenging
due to Cu complexation by carboxylates, protonation of the ligand,
and displacement of the halogen chain end. A robust mesohemin-based
catalyst provided controlled ATRP of methacrylic acid, yielding poly(methacrylic
acid) with Mn ≥ 20000 and dispersity Đ < 1.5. Retention of halogen chain end was confirmed
by successful chain extension of a poly(methacrylic acid)–Br
macroinitiator.