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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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