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231225s2018 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.7b03167
|2 doi
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|a pubmed24n0937.xml
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|a (NLM)29457981
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Laun, Joachim
|e verfasserin
|4 aut
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| 245 |
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|a Reversible Surface Engineering via Nitrone-Mediated Radical Coupling
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|c 2018
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 14.05.2018
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|a Date Revised 14.05.2018
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a 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) ( Mn = 1570 g·mol-1, D̵ = 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 nm2 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
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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1 |
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|a Marchal, Wouter
|e verfasserin
|4 aut
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| 700 |
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|a Trouillet, Vanessa
|e verfasserin
|4 aut
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| 700 |
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|a Welle, Alexander
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Hardy, An
|e verfasserin
|4 aut
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|a Van Bael, Marlies K
|e verfasserin
|4 aut
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|a Barner-Kowollik, Christopher
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Junkers, Tanja
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 34(2018), 10 vom: 13. März, Seite 3244-3255
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:34
|g year:2018
|g number:10
|g day:13
|g month:03
|g pages:3244-3255
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|u http://dx.doi.org/10.1021/acs.langmuir.7b03167
|3 Volltext
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