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1 article(s) from Major, Mohamed

Stability of SG1 nitroxide towards unprotected sugar and lithium salts: a preamble to cellulose modification by nitroxide-mediated graft polymerization

Guillaume Moreira,
Laurence Charles,
Mohamed Major,
Florence Vacandio,
Yohann Guillaneuf,
Catherine Lefay and
Didier Gigmes

Beilstein J. Org. Chem. 2013, 9, 1589–1600, doi:10.3762/bjoc.9.181

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Graphical Abstract

Figure 1: Structure of the SG1, TEMPO and DBN nitroxides and the BlocBuilder MA alkoxyamine.

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Figure 2: Key equilibrium between active and dormant species involved in the nitroxide-mediated (NMP) polymer...

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Figure 3: Degradation of the SG1 nitroxide versus time in the presence of 0 (empty stars), 1 (filled squares)...

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Figure 4: Degradation of the SG1 (triangles) and TEMPO (squares) nitroxides versus time in the presence of 0 ...

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Figure 5: Degradation of the SG1 nitroxide versus time in DMA (filled squares), DMF (filled triangles), MeOH ...

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Figure 6: Degradation of the SG1 nitroxide versus time in the presence of 0% of lithium salt in DMA (empty sq...

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Figure 7: Degradation of the TEMPO nitroxide versus time in DMA in the presence of 0% lithium salt (empty squ...

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Figure 8: NMP of styrene initiated by the BlocBuilder MA alkoxyamine at 120 °C in DMA without LiCl salt. (a) ...

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Scheme 1: Synthesis of the cellobiose and SG1-based alkoxyamine (cello-SG1). The shown regioisomer exhibits a...

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Figure 9: (a) Evolution of the number-average molar mass (M_n: filled symbol, linear fit: dash lines) and poly...

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Scheme 2: (Reversible) redox system of nitroxide.

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Figure 10: Cyclic voltammograms in DMF of (a) SG1 (10⁻² M)/ NaClO₄ (10⁻¹ M) and (b) LiCl (10⁻² M)/TBAPF₆ (10⁻¹...

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Figure 11: Cyclic voltammograms of DMF/4.5 wt % LiBr solution heated at 80 °C for 30 min (plain line) and 14 h...

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Scheme 3: Hydrolysis of DMA in the presence of LiCl.

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Scheme 4: Disproportionation of nitroxide 1 by acid treatment.

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Figure 12: Degradation of the nitroxides (SG1 and TEMPO) in the presence of HCl. (a) TEMPO ESR signal in the p...

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Published 06 Aug 2013

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