Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/152586
Title: Formation of sulfonyl aromatic alcohols by electrolysis of a bisazo reactive dye
Author: Elizalde González, María P.
Arroyo Abad, Uriel
Garcia Díaz, Esmeralda
Brillas, Enric
Sirés Sadornil, Ignacio
Dávila Jiménez, Martín M.
Keywords: Alcohols
Compostos aromàtics
Sulfonació
Electròlisi
Alcohols
Aromatic compounds
Sulphonation
Electrolysis
Issue Date: 5-Dec-2012
Publisher: MDPI
Abstract: Five sulfonyl aromatic alcohols, namely 4-((2-hydroxyethyl)sulfonyl)phenol, 4-((2-(2-((4-hydroxyphenyl)sulfonyl)ethoxy)vinyl)sulfonyl)phenol, 4-(ethylsulfonyl)phenol, 4-(vinylsulfonyl)phenol and 5-((4-aminophenyl)sulfonyl)-2-penten-1-ol were identified by LC-ESI-Qq-TOF-MS as products formed by electrolysis of the bisazo reactive dye Reactive Black 5 (RB5). Since electrolyses were performed in an undivided cell equipped with Ni electrodes in alkaline medium, amines like 4-(2-methoxyethylsulfonyl)benzene-amine (MEBA) with m/z 216 were also suspected to be formed due to the plausible chemical reaction in the bulk or the cathodic reduction of RB5 and its oxidation by-products. Aiming to check this hypothesis, a method was used for the preparation of MEBA with 98% purity, via chemical reduction also of the dye RB5. The logP of the synthesized sulfonyl aromatic compounds was calculated and their logkw values were determined chromatographically. These data were discussed in regard to the relationship between hydrophobicity/lipophilicity and toxicity.
Note: Reproducció del document publicat a: https://doi.org/10.3390/molecules171214377
It is part of: Molecules, 2012, vol. 17, num. 12, p. 14377-14392
URI: http://hdl.handle.net/2445/152586
Related resource: https://doi.org/10.3390/molecules171214377
ISSN: 1420-3049
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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