Dynamic nitroxide functional materials
Woehlk, Hendrik, Lauer, Andrea, Trouillet, Vanessa, Welle, Alexander, Barner, Leonie, Blinco, James, Fairfull-Smith, Kathryn, & Barner-Kowollik, Christopher (2018) Dynamic nitroxide functional materials. Chemistry - A European Journal, 24(71), pp. 18873-18879.
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33390471. |
Description
A substrate‐independent and versatile coating platform for (spatially resolved) surface functionalization, based on nitroxide radical coupling (NRC) reactions and the formation of thermo‐labile alkoxyamine functional groups, was introduced. Nitroxide‐decorated poly(glycidyl methacrylate) (PGMA) microspheres, obtained through bioinspired copolymer surface deposition using dopamine and a nitroxide functional dopamine derivative as monomers, were conjugated with small functional groups in a rewritable process. Reversible coding of the nitroxide functional microspheres by NRC and decoding through thermal alkoxyamine fission were monitored and characterized by electron paramagnetic resonance (EPR) spectroscopy and X‐ray photoelectron spectroscopy (XPS). In addition, this nitroxide coating system was exploited in “grafting‐to” polymer surface ligations of poly(methyl methacrylate) (PMMA) and poly(2,2,2‐trifluoroethyl methacrylate) (PTFEMA) in spatially confined areas. Polymer strands terminated with an Irgacure 2959 (2‐hydroxy‐4′‐(2‐hydroxyethoxy)‐2‐methylpropiophenone) photoinitiator were obtained through chain‐transfer polymerization, and subsequently coupled to nitroxide‐immobilized poly(dopamine) (PDA)‐coated silicon substrates by using rapid photoclick NRC reactions. Light‐driven polymer surface coding was visualized by time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) and XPS imaging.
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| ID Code: | 124675 | ||||||||
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| Item Type: | Contribution to Journal (Journal Article) | ||||||||
| Refereed: | Yes | ||||||||
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| Additional Information: | Acknowledgements: K.E.F.-S., L.B., and C.B.-K. acknowledge financial support from the Australian Research Council (Discovery Project DP150100234) and the Queensland University of Technology (QUT). K.E.F.-S. acknowledges funding from an Australian Research Council Future Fellowship (FT140100746). C.B.-K. acknowledges an Australian Research Council (ARC) Laureate Fellowship enabling his photochemical research program, the Queensland University of Technology (QUT) for key support as well as continuous funding from the Karlsruhe Institute of Technology (KIT) in the context of the BIFTM program of the Helmholtz association. The purchase of the XPS K-Alpha+ instrument was financially supported by the Federal Ministry of Economics and Technology on the basis of a decision by the German Bundestag. Some of the data reported in this article were obtained at the Central Analytical Research Facility (CARF) operated by the Institute of Future Environments (QUT). Access to CARF was supported by generous funding from the Science and Engineering Faculty (QUT). Specific polymers were kindly provided by Dr. David Fast (TU Graz). | ||||||||
| Measurements or Duration: | 7 pages | ||||||||
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| DOI: | 10.1002/chem.201804602 | ||||||||
| ISSN: | 0947-6539 | ||||||||
| Pure ID: | 33390471 | ||||||||
| Divisions: | Past > Institutes > Institute for Future Environments Past > QUT Faculties & Divisions > Science & Engineering Faculty |
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| Copyright Owner: | 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim | ||||||||
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| Deposited On: | 16 Jan 2019 13:42 | ||||||||
| Last Modified: | 22 Apr 2026 23:27 |
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