Transition metal-modified polyoxometalates supported on carbon as catalyst in 2-(methylthio)-benzothiazole sulfoxidation

Polyoxometalates with lacunary Keggin structure modified with transition metal ions [PW₁₁O₃₉ M(H₂O)]⁵⁻, where M= Ni²⁺, Co²⁺,, Cu²⁺, or Zn²⁺,, were synthesized and supported on activated carbon to obtain the PW11MC catalysts. Using FT-IR and DTA-TGA it was concluded that the [PW11O₃₉M(H₂O)]⁵⁻ species...

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Autores principales: Frenzel, Romina Alejandra, Romanelli, Gustavo Pablo, Blanco, Mirta Noemí, Pizzio, Luis René
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Química
Supported metal-substituted polyoxometalates
Carbon
2-(methylthio)- benzothiazole oxidation
Sulfoxidation
Hydrogen peroxide
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/127581
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-127581
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Supported metal-substituted polyoxometalates
Carbon
2-(methylthio)- benzothiazole oxidation
Sulfoxidation
Hydrogen peroxide
spellingShingle Química
Supported metal-substituted polyoxometalates
Carbon
2-(methylthio)- benzothiazole oxidation
Sulfoxidation
Hydrogen peroxide
Frenzel, Romina Alejandra
Romanelli, Gustavo Pablo
Blanco, Mirta Noemí
Pizzio, Luis René
Transition metal-modified polyoxometalates supported on carbon as catalyst in 2-(methylthio)-benzothiazole sulfoxidation
topic_facet Química
Supported metal-substituted polyoxometalates
Carbon
2-(methylthio)- benzothiazole oxidation
Sulfoxidation
Hydrogen peroxide
description Polyoxometalates with lacunary Keggin structure modified with transition metal ions [PW₁₁O₃₉ M(H₂O)]⁵⁻, where M= Ni²⁺, Co²⁺,, Cu²⁺, or Zn²⁺,, were synthesized and supported on activated carbon to obtain the PW11MC catalysts. Using FT-IR and DTA-TGA it was concluded that the [PW11O₃₉M(H₂O)]⁵⁻ species are interacting with the functional groups of the support, and that thermal treatment leads to the loss of the coordinatively bonded water molecules without any noticeable anion degradation. The activity and selectivity of the catalysts in the sulfoxidation reaction of 2-(methylthio)-benzothiazole, an emerging environmental pollutant, were evaluated. The reaction was carried out in acetonitrile as solvent using H₂O₂ 35% p/v as a clean oxidant. The conversion values decreased in the following order: PW11NiC > PW11CuC > PW11CoC > PW11ZnC, with selectivity to sulfoxide higher than 69%. The catalyst could be reused without appreciable loss of the catalytic activity at least three times. The materials were found to be efficient and recyclable catalysts for 2-(methylthio)-benzothiazole sulfoxidation in order to obtain a more biodegradable product than the corresponding substrate.
format Articulo
Articulo
author Frenzel, Romina Alejandra
Romanelli, Gustavo Pablo
Blanco, Mirta Noemí
Pizzio, Luis René
author_facet Frenzel, Romina Alejandra
Romanelli, Gustavo Pablo
Blanco, Mirta Noemí
Pizzio, Luis René
author_sort Frenzel, Romina Alejandra
title Transition metal-modified polyoxometalates supported on carbon as catalyst in 2-(methylthio)-benzothiazole sulfoxidation
title_short Transition metal-modified polyoxometalates supported on carbon as catalyst in 2-(methylthio)-benzothiazole sulfoxidation
title_full Transition metal-modified polyoxometalates supported on carbon as catalyst in 2-(methylthio)-benzothiazole sulfoxidation
title_fullStr Transition metal-modified polyoxometalates supported on carbon as catalyst in 2-(methylthio)-benzothiazole sulfoxidation
title_full_unstemmed Transition metal-modified polyoxometalates supported on carbon as catalyst in 2-(methylthio)-benzothiazole sulfoxidation
title_sort transition metal-modified polyoxometalates supported on carbon as catalyst in 2-(methylthio)-benzothiazole sulfoxidation
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/127581
work_keys_str_mv AT frenzelrominaalejandra transitionmetalmodifiedpolyoxometalatessupportedoncarbonascatalystin2methylthiobenzothiazolesulfoxidation
AT romanelligustavopablo transitionmetalmodifiedpolyoxometalatessupportedoncarbonascatalystin2methylthiobenzothiazolesulfoxidation
AT blancomirtanoemi transitionmetalmodifiedpolyoxometalatessupportedoncarbonascatalystin2methylthiobenzothiazolesulfoxidation
AT pizzioluisrene transitionmetalmodifiedpolyoxometalatessupportedoncarbonascatalystin2methylthiobenzothiazolesulfoxidation
bdutipo_str Repositorios
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