Surface-Initiated Photoinduced Iron-Catalyzed Atom Transfer Radical Polymerization with ppm Concentration of FeBr3 under Visible Light

Materials
Monika SłowikowskaKarol Wolski

Abstract

Reversible deactivation radical polymerizations with reduced amount of organometallic catalyst are currently a field of interest of many applications. One of the very promising techniques is photoinduced atom transfer radical polymerization (photo-ATRP) that is mainly studied for copper catalysts in the solution. Recently, advantageous iron-catalyzed photo-ATRP (photo-Fe-ATRP) compatible with high demanding biological applications was presented. In response to that, we developed surface-initiated photo-Fe-ATRP (SI-photo-Fe-ATRP) that was used for facile synthesis of poly(methyl methacrylate) brushes with the presence of only 200 ppm of FeBr3/tetrabutylammonium bromide catalyst (FeBr3/TBABr) under visible light irradiation (wavelength: 450 nm). The kinetics of both SI-photo-Fe-ATRP and photo-Fe-ATRP in solution were compared and followed by 1H NMR, atomic force microscopy (AFM) and gel permeation chromatography (GPC). Brush grafting densities were determined using two methodologies. The influence of the sacrificial initiator on the kinetics of brush growth was studied. It was found that SI-photo-Fe-ATRP could be effectively controlled even without any sacrificial initiators thanks to in situ production of ATRP initiator in solut...Continue Reading

References

Mar 21, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Krzysztof MatyjaszewskiAndy Kusumo
Dec 18, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Haoyu WangPinar Akcora
Dec 21, 2016·Macromolecular Rapid Communications·Xiangcheng PanKrzysztof Matyjaszewski
Apr 9, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Sajjad Dadashi-Silab, Krzysztof Matyjaszewski

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Methods Mentioned

BETA
AFM
atomic force microscopy

Software Mentioned

OMNIC
NanoScope Analysis
ASTRA

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