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Synthesis of end‐functionalized poly( N ‐isopropyl acrylamide) with zinc porphyrin and its photocatalytic activity under visible light
Author(s) -
Qiu Nannan,
Li Yanhui,
Han Shuangli,
Satoh Toshifumi,
Kakuchi Toyoji,
Duan Qian
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40523
Subject(s) - porphyrin , polymer chemistry , dispersity , isopropyl , photocatalysis , gel permeation chromatography , chemistry , polymerization , zinc , atom transfer radical polymerization , acrylamide , fourier transform infrared spectroscopy , nuclear chemistry , photochemistry , copolymer , organic chemistry , catalysis , polymer , chemical engineering , engineering
ABSTRACT A series of well‐defined linear poly( N ‐isopropyl acrylamide) with an asymmetrical zinc(II) porphyrin (ZnPor–PAM) end group was synthesized by atom transfer radical polymerization, wherein 5,10,15,20‐ tetra ( p ‐bromopropanoyloxyethylphenyl) zinc porphyrin tripropionate was used as the initiator and CuBr/tris(2‐dimeoethyl)amine was used as the catalyst system. The structure of the ZnPor–PAM was characterized by Fourier transform infrared spectroscopy and 1 H‐NMR. In addition, the polydispersity index (PDI) obtained by gel permeation chromatography indicated that the molecular weight distribution was narrow; thus, the polymerization was well controlled (1.05 < PDI < 1.21). Because of the incorporation of hydrophobic porphyrin, the lower critical solution temperature of ZnPor–PAM was lower than that of the N ‐isopropyl acrylamide homopolymer. Most interestingly, the ZnPor–PAM possessed remarkable photocatalytic activity for the oxidative degradation of methylene blue in the presence of hydrogen peroxide under visible‐light radiation. Moreover, ZnPor–PAM could be reused through the uncomplicated procedure, which exploited the thermoresponsive properties of ZnPor–PAM without any significant loss in activity. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40523.