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One‐step Solvent‐free Synthesis and Grafting of Diazonium Ions at Glassy Carbon Electrodes
Author(s) -
Via Garrhett G.,
Shugart Chelsea L.,
Melnyk Sophia L.,
Hupman Stephanie R.,
Cline Kristin K.
Publication year - 2018
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201800407
Subject(s) - grafting , glassy carbon , cyclic voltammetry , chemistry , inorganic chemistry , amine gas treating , solvent , electrode , diazonium compounds , electrochemistry , polymer chemistry , organic chemistry , polymer
A one‐step method for combined diazonium ion synthesis and electrode grafting was developed. Diazonium salts were synthesized by using a glassy carbon electrode to grind together a water paste of aryl amine, p ‐toluenesulfonic acid, and sodium nitrite. Diazonium ion formation was verified by Raman spectroscopy and by a color change upon reaction of the paste with 2‐naphthol. Cyclic voltammetry after grinding electrodes showed characteristic peaks for grafted groups. Diazonium ion synthesis and grafting was achieved with amines including p ‐nitroaniline, 2‐aminoanthraquinone, and 5‐amino‐2‐nitrobenzoic acid.