Synthesis of 4-sulfonatooxy-2,2,6,6-tetramethylpiperidine-1-yloxyl derivatives for investigation of ionic liquids |
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| Authors: | Veronika Strehmel Hans Rexhausen |
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| Institution: | a University of Potsdam, Institute of Chemistry, Applied Polymer Chemistry, Karl-Liebknecht-Strasse 24-25, D-14476 Potsdam-Golm, Germany
b University of Potsdam, Institute of Chemistry, Inorganic Chemistry, Karl-Liebknecht-Strasse 24-25, D-14476 Potsdam-Golm, Germany |
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| Abstract: | Direct sulfonation of 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-yloxyl using chlorosulfuric acid trimethylsilylester results in 4-sulfonatooxy-2,2,6,6-tetramethylpiperidine-1-yloxyl in 94% yield that is the basis for the synthesis of potassium 4-sulfonatooxy-2,2,6,6-tetramethylpiperidine-1-yloxyl and sodium 4-sulfonatooxy-2,2,6,6-tetramethylpiperidine-1-yloxyl. These nitroxides can be employed as spin probes to investigate properties of ionic liquids in the molecular domain. |
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| Keywords: | Spin probes ESR spectroscopy Nitroxides Ionic liquids |
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