INDIGO CARMINE - AN ELECTROCHEMICAL STUDY

Authors
BEGGIATO G CASALBOREMICELI G GERI A PIETROPAOLO D
Citation
G. Beggiato et al., INDIGO CARMINE - AN ELECTROCHEMICAL STUDY, Annali di chimica, 83(7-8), 1993, pp. 355-363
Citations number
6
Categorie Soggetti
Chemistry
Journal title
Annali di chimica → ACNP
ISSN journal
00034592
Volume
83
Issue
7-8
Year of publication
1993
Pages
355 - 363
Database
ISI
SICI code
0003-4592(1993)83:7-8<355:IC-AES>2.0.ZU;2-H
Abstract
The electrochemical oxidation of Indigo Carmine (IC) has been investig ated at different PH's. In acid or neutral media (pH 1-7) the electrod ic process is bielectronic and leads in all cases to dehydroindigo; in basic media (pH > 9) the process is bielectronic and 2,2'-dihydroxy-I C is obtained if the oxidation is carried out at +0.4 V (first voltamm etric peak), while at +0.8 V (second peak) the process is tetraelectro nic and isatin is the product obtained.