Synthesis of diazonium (perfluoroalkyl) benzenesulfonylimide zwitterions

The synthesis and properties of diazonium (perfluoroalkyl) benzenesulfonylimide (PFSI) zwitterions are described. The general procedures for the diazonium PFSI zwitterions involve three steps: (1) a coupling reaction, (2) a reduction reaction and (3) a diazotization reaction. These novel diazonium PFSI zwitterions represent a new versatile class of remarkably stable diazonium materials with potential for modification of carbon supports for electrodes in proton exchange membrane (PEM) fuel cells.

Stable diazonium zwitterions for carbon modification.Figure optionsDownload as PowerPoint slideHighlights
► Synthesis of remarkably stable diazonium zwitterions.
► Multifunctional examples prepared.
► Potential applications for electrode modification in PEM fuel cells.
► Based on the extensive chemistry of diazonium compounds in general, extensive new chemistry possible.