Journal
POLYMER CHEMISTRY
Volume 7, Issue 42, Pages 6490-6499Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6py01303a
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Funding
- Investissements d'Avenir French Government program [ANR-11-IDEX-0001-02]
- Fondation ARC pour la recherche sur le cancer [PJA 20141201886]
- Russian Science Foundation [15-13-20020]
- Russian Science Foundation [15-13-20020] Funding Source: Russian Science Foundation
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Recently, new applications of trityl-nitroxide biradicals were proposed. In the present study, attachment of a trityl radical to alkoxyamines was performed for the first time. The rate constants k(d) of C-ON bond homolysis in these alkoxyamines were measured and found to be similar to those for alkoxyamines without a trityl moiety. The electron paramagnetic resonance (EPR) spectra of the products of alkoxyamine homolysis (trityl-TEMPO and trityl-SG1 biradicals) were recorded, and the corresponding exchange interactions were estimated. The decomposition of trityl-alkoxyamines showed more than an 80% yield of biradicals, meaning that the C-ON bond homolysis is the main reaction. The suitability of these labelled initiators/controllers for polymerisation was exemplified by means of a successful nitroxide-mediated polymerisation (NMP) of styrene. Thus, this is the first report of a spin-labelled alkoxyamine suitable for NMP.
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