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Fluorinated POSS‐Star Polymers for 19 F MRI
Author(s) -
Wang Kewei,
Peng Hui,
Thurecht Kristofer J.,
Whittaker Andrew K.
Publication year - 2016
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201600084
Subject(s) - polymer , polymer chemistry , copolymer , polymerization , acrylate , materials science , ethylene glycol , chain transfer , methyl acrylate , ether , chemistry , radical polymerization , organic chemistry , composite material
Star polymers with a polyhedral oligomeric silsesquioxanes (POSS) core and eight partly fluorinated arms have been synthesized by reversible addition–fragmentation chain transfer polymerization. A macroCTA having eight chain transfer agent (CTA) molecules attached to a POSS core is prepared and used for the synthesis of star polymers by the R‐group approach. The arms are composed of statistical copolymers of 2,2,2‐trifluoroethyl acrylate and poly(ethylene glycol) methyl ether acrylate. The polymerization kinetics are studied, and yield of star polymer is optimized. Star polymers having different arm lengths are prepared and characterized. The star polymers exhibit a single 19 F resonance in 19 F nuclear magnetic resonance spectra in aqueous solution, and the T 2 relaxation time increases with arm length. The relaxation properties and the fluorine content are consistent with these polymers being effective 19 F magnetic resonance imaging (MRI) agents. This work indicates that these POSS‐star polymers have potential as theranostic agents for 19 F MRI and drug delivery.