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Star‐shaped Polymers through Simple Wavelength‐Selective Free‐Radical Photopolymerization
Author(s) -
Eibel Anna,
Fast David E.,
Sattelkow Jürgen,
Zalibera Michal,
Wang Jieping,
Huber Alex,
Müller Georgina,
Neshchadin Dmytro,
Dietliker Kurt,
Plank Harald,
Grützmacher Hansjörg,
Gescheidt Georg
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201708274
Subject(s) - photopolymer , polymer , materials science , moiety , radical polymerization , ketone , nanotechnology , star polymer , polymerization , drug delivery , molecule , photochemistry , polymer chemistry , chemistry , organic chemistry , composite material
Abstract Star‐shaped polymers represent highly desired materials in nanotechnology and life sciences, including biomedical applications (e.g., diagnostic imaging, tissue engineering, and targeted drug delivery). Herein, we report a straightforward synthesis of wavelength‐selective multifunctional photoinitiators (PIs) that contain a bisacylphosphane oxide (BAPO) group and an α‐hydroxy ketone moiety within one molecule. By using three different wavelengths, these photoactive groups can be selectively addressed and activated, thereby allowing the synthesis of ABC‐type miktoarm star polymers through a simple, highly selective, and robust free‐radical polymerization method. The photochemistry of these new initiators and the feasibility of this concept were investigated in unprecedented detail by using various spectroscopic techniques.