首页 | 本学科首页   官方微博 | 高级检索  
     


NIR Light-Induced ATRP for Synthesis of Block Copolymers Comprising UV-Absorbing Moieties
Authors:Ceren Kütahya  Nicolai Meckbach  Prof. Dr. Veronika Strehmel  Prof. Dr. Jochen S. Gutmann  Prof. Dr. Bernd Strehmel
Affiliation:1. Department of Chemistry, Institute for Coatings and Surface Chemistry, Niederrhein University of Applied Sciences, Adlerstr. 1, 47798 Krefeld, Germany;2. Department of Chemistry, Institute for Coatings and Surface Chemistry, Niederrhein University of Applied Sciences, Adlerstr. 1, 47798 Krefeld, Germany

These authors contributed equally to this work.;3. Department of Chemistry, Institute for Coatings and Surface Chemistry, Niederrhein University of Applied Sciences, Adlerstr. 32, 47798 Krefeld, Germany;4. Department of Physical Chemistry, Center of, Nanointegration (CENIDE), University of Duisburg-Essen, 45141 Essen, Germany

Abstract:NIR exposure at 790 nm activated photopolymerization of monomers comprising UV-absorbing moieties by using [CuII/(TPMA)]Br2 (TPMA=tris(2-pyridylmethyl)amine) in the ppm range and an alkyl bromide as initiator. Some of them comprised structural elements selected either from those showing proton transfer or photocycloaddition upon UV excitation. Polymers obtained comprise living end groups serving as macroinitiator for controlled synthesis of block copolymers with relatively narrow molecular weight distributions. Chromatographic results indicated formation of block copolymers produced by this synthetic approach. Free-radical polymerization of monomers pursued for comparison exhibited the expected broader dispersity of molecular weight compared to photo-ATRP. Polymerization of these monomers by UV photo-ATRP failed on the contrary to NIR photo-ATRP demonstrating the UV-filter function of the monomers. This work conclusively provides a new approach for the polymerization of monomers comprising UV-absorbing moieties through photo-ATRP in the NIR region. This occurred in a simple and efficient pathway. However, studies also showed that not all monomers chosen successfully proceeded in the NIR photo-ATRP protocol.
Keywords:block copolymers  copper catalysis  cyanine  near-infrared radiation  photo-ATRP
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号