Premium
Kinetics of electropolymerization of 1‐amino‐9,10‐anthraquinone
Author(s) -
Badawy Waheed A.,
Ismail Khaled M.,
Medany Shymaa S.
Publication year - 2011
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.20541
Subject(s) - chemistry , electrolyte , aqueous solution , polymerization , supporting electrolyte , anthraquinone , acetonitrile , kinetics , inorganic chemistry , sodium perchlorate , perchlorate , lithium perchlorate , solvent , monomer , chronoamperometry , platinum , cyclic voltammetry , organic chemistry , electrochemistry , polymer , electrode , catalysis , ion , physics , quantum mechanics
1‐Amino‐9,10‐anthraquinone was electropolymerized on platinum substrates either from aqueous or nonaqueous electrolytes. The aqueous electrolyte was 6.0 mol L −1 H 2 SO 4 , and the nonaqueous solvent was acetonitrile containing lithium perchlorate, LiClO 4 , as a supporting electrolyte. The formed polyaminoanthraquinone was stable, and the polymerization process was reproducible. The kinetics of the electropolymerization process was investigated by determining the charge consumed during the electropolymerization as a function of time at different concentrations of the electrolyte components. The results of chronoamperometry have been used to determine the orders of reaction. In either aqueous or nonaqueous solution, the electropolymerization process follows first‐order kinetics with respect to the monomer concentration. In nonaqueous solution, the very small concentrations of water did not affect the order of reaction. The order of reaction with respect to the traces of water and the supporting electrolyte concentration was found to be zero. In aqueous solution, the order of the electropolymerization reaction with respect to the concentration of H 2 SO 4 was found to be negative (−0.66), which means that the aqueous electrolyte inhibits the polymerization reaction. © 2011 Wiley Periodicals, Inc. Int J Chem Kinet 43: 141–146, 2011