Please use this identifier to cite or link to this item:
http://hdl.handle.net/1942/26238
Title: | Reversible Surface Engineering via Nitrone-Mediated Radical Coupling | Authors: | LAUN, Joachim MARCHAL, Wouter Trouillet, Vanessa Welle, Alexander HARDY, An VAN BAEL, Marlies Barner-Kowollik, Christopher JUNKERS, Tanja |
Issue Date: | 2018 | Source: | LANGMUIR, 34(10), p. 3244-3255 | Abstract: | Efficient and simple polymer conjugation reactions are critical for introducing functionalities on surfaces. For polymer surface grafting, postpolymerization modifications are often required, which can impose a significant synthetic hurdle. Here, we report two strategies that allow for reversible surface engineering via nitrone-mediated radical coupling (NMRC). Macroradicals stemming from the activation of polymers generated by copper-mediated radical polymerization are grafted via radical trapping with a surface-immobilized nitrone or a solution-borne nitrone. Since the product of NMRC coupling features an alkoxyamine linker, the grafting reactions can be reversed or chain insertions can be performed via nitroxide-mediated polymerization (NMP). Poly(n-butyl acrylate) (M-n = 1570 g.mol(-1) D = 1.12) with a bromine terminus was reversibly grafted to planar silicon substrates or silica nanoparticles as successfully evidenced via X-ray photoelectron spectroscopy (XPS), time-of-flight secondary ion mass spectrometry, and grazing angle attenuated total reflection Fourier-transform infrared spectroscopy (GAATR-FTIR). NMP chain insertions of styrene are evidenced via GAATR-FTIR On silica nanoparticles, an NMRC grafting density of close to 0.21 chains per nm(2) was determined by dynamic light scattering and thermogravimetric analysis. Concomitantly, a simple way to decorate particles with nitroxide radicals with precise control over the radical concentration is introduced. Silica microparticles and zinc oxide, barium titanate, and silicon nanoparticles were successfully functionalized. | Notes: | Junkers, T (reprint author), Univ Hasselt, Polymer React Design Grp, Inst Mat Res IMO, Martelarenlaan 42, B-3500 Hasselt, Belgium, christopher.barnerkowollik@qut.edu.au; tanja.junkers@uhasselt.be | Document URI: | http://hdl.handle.net/1942/26238 | ISSN: | 0743-7463 | e-ISSN: | 1520-5827 | DOI: | 10.1021/acs.langmuir.7b03167 | ISI #: | 000427661100011 | Rights: | © 2018 American Chemical Society | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2019 |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
laun 1.pdf Restricted Access | Published version | 4.17 MB | Adobe PDF | View/Open Request a copy |
SCOPUSTM
Citations
2
checked on Sep 5, 2020
WEB OF SCIENCETM
Citations
3
checked on Oct 13, 2024
Page view(s)
90
checked on Sep 7, 2022
Download(s)
70
checked on Sep 7, 2022
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.