Kinetics of Fe–Mesohemin–(MPEG<sub>500</sub>)<sub>2</sub>‑Mediated RDRP in Aqueous Solution


A speciation analysis for Fe–mesohemin–(MPEG<sub>500</sub>)<sub>2</sub>-mediated reversible-deactivation radical polymerization (RDRP) in aqueous solution was carried out by a combination of visible (vis) and <sup>57</sup>Fe Mössbauer spectroscopy. The results were used within kinetic studies of ATRP and OMRP reactions via highly time-resolved EPR spectroscopy. ATRP control was effective with the rate coefficient for deactivation clearly exceeding the one for formation of organometallic species. Deactivation rate coefficients increase by more than 1 order of magnitude in passing from polymerization in 30 to 90 wt % H<sub>2</sub>O. Media with water contents of and above 70 wt % are well suited for controlled ATRP. The Fe–mesohemin catalyst provides an exceptionally high ATRP equilibrium constant even at ambient temperature, which approaches the one of highly active Cu catalysts

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oai:figshare.com:article/4047801Last time updated on 2/12/2018

This paper was published in FigShare.

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