Metallophthalocyanine-catalyzed oxidation of catechols by H2O2 and its surrogates

Sorokin, Alexander B.; Fraisse, Laurent; Rabion, Alain; Meunier, Bernard

doi:10.1016/s1381-1169(96)00415-3

Cited by 63 publications

(32 citation statements)

References 27 publications

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“…3,4,9,10-Perylenetetracarboxylic acid (PTCA) has been described as a potential visible light transfer agent semiconductors 15 . Finally, Fe(II) 4,4',4'',4'''-tetrasulphophtalocyanine (TSPC) was used to promote the thermal oxidative degradation of catechol 16 and veratryl alcohol 17 in the presence of hydrogen peroxide. All these compounds are water-soluble at alkaline pH and their absorption spectra are given in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Water soluble iron and manganese sulfoporphyrins and sulfophthalocyanines have been developed during the last decade as ligninase substitutes to degrade aromatic derivatives 16 . In that respect, the iron (II) sulfophthalocyanine TSPC was found to be very efficient for thermal degradation of catechols 16 .…”

Section: Examination Ofmentioning

confidence: 99%

“…In that respect, the iron (II) sulfophthalocyanine TSPC was found to be very efficient for thermal degradation of catechols 16 . We have used this compound to enhance the photodelignification because in addition to its thermal ability to degrade lignin model compounds, it has an important absorption band in the visible region which is very similar to the one of methylene blue (Fig.…”

Section: Examination Ofmentioning

confidence: 99%

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The Improvement of the Bleaching of Peroxyformic Sugar Cane Bagasse Pulp by Photocatalysis and Photosensitization

Castellan¹,

Perez²,

Nourmamode³

et al. 1999

J. Braz. Chem. Soc.

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» 10-5 mol L-1) como agentes fotosensibilizadores, oxigênio e peróxido de hidrogênio. O segundo estágio, conduzido sob peróxido de hidrogênio, completa eficientemente a deslignificação, permitindo a obtenção de elevado grau de alvura, bem como a remoção completa do fotosensibilizador absorvido sobre a polpa. Empregando esta seqüência, resultados altamente satisfatórios foram obtidos na presença de luz UV/visível e de PTCA ou MB (polpa não branqueada - número de Kappa: 13, índice de alvura: 44, viscosidade: 900 dm³ kg-1 ; polpa branqueada - número de Kappa: 1.2-1.3, índice de alvura: 86, viscosidade: 510-550 dm³ kg-1), bem como sob luz visível na presença de MB ( número de Kappa: 1.7, índice de alvura: 80, viscosidade: 625 dm³ kg-1). Apesar dos bons resultados apresentados, mecanismos com vistas ao aumento de selectividade e eficiência do processo de fotobranqueamento deverão ser desenvolvidos futuramente.]]>

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Section: Resultsmentioning

confidence: 99%

Section: Examination Ofmentioning

confidence: 99%

Section: Examination Ofmentioning

confidence: 99%

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The Improvement of the Bleaching of Peroxyformic Sugar Cane Bagasse Pulp by Photocatalysis and Photosensitization

Castellan¹,

Perez²,

Nourmamode³

et al. 1999

J. Braz. Chem. Soc.

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“…Carbon-carbon cleavage in catechols using H 2 O 2 or SPC is catalyzed by iron sulfophthalocyanines, the products being malic acids. 31 Oxidative cleavage of α-haloketones, 32 as well as αketols and α-diketones, 33 to carboxylic acids by SPC in aqueous acetone solutions is quite effective. For aromatic α-diketones, the presence of an electron-donating group in the para-position slows down the oxidation process.…”

Section: Functional Group Oxidationsmentioning

confidence: 99%

Sodium Percarbonate

Kabalka

Reddy

2008

Encyclopedia of Reagents for Organic Synthesis

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“…Iron-, manganese-and cobalt sulfonatophthalocyanines were also able to efficiently catalyze the oxidation of various catechols with hydrogen peroxide. 144 Tetrachlorocatechol was oxidized to dichloromaleic acid, a ring cleavage product. FePcS can also be adsorbed on cationic ion-exchange resins, like Amberlites, as previously observed for sulfonated metalloporphyrins (see above, paragraph 3.3.2).…”

Section: Oxidation Of Pollutants By Ligninase Modelsmentioning

confidence: 99%