Cobalt 4-octasulfophenyltetrapyrazinoporphyrazine as a catalyst for the oxidation of organic substrates with atmospheric oxygen

Shishkin, V. N.; Kudrik, E. V.; Макаров, С. В.; Shaposhnikov, G. P.

doi:10.1134/s0023158407050102

Cited by 21 publications

(14 citation statements)

References 7 publications

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“…Evidence was obtained that the deprotonation of the coordinated water occurring in the basic medium leads to the electron transfer from the hydroxyl group to the TPyzPz macrocycle [198,202]. The facile reduction of the macrocycle, which also takes place in the case of Co II complex, is responsible for its catalytic activity in oxidation of different organic substrates by O 2 or nitrite [63][64][65].…”

Section: Aryl Substituted Tpyzpzsmentioning

confidence: 99%

“…Peripheral substituents endow TPyzPzs not only with solubility in organic or aqueous solvents, but also fine-tune spectral and other physico-chemical properties and biological activity. In the recent decade, these new peripherally substituted macrocycles have been especially studied as promising species for application in photodynamic therapy (PDT) [49][50][51][52][53][54][55] and plurimodal cancer therapy [56][57][58][59] and as active catalysts in redox processes [60][61][62][63][64][65]. In the following sections, different types of pyrazine-annulated porphyrazines and their metal derivatives will be considered with an emphasis primarily on the synthetic and structural aspects.…”

Section: Introductionmentioning

confidence: 99%

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Tetrapyrazinoporphyrazines and their metal derivatives. Part I: Synthesis and basic structural information

Donzello

Ercolani

Novakova

et al. 2016

Coordination Chemistry Reviews

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Section: Aryl Substituted Tpyzpzsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tetrapyrazinoporphyrazines and their metal derivatives. Part I: Synthesis and basic structural information

Donzello

Ercolani

Novakova

et al. 2016

Coordination Chemistry Reviews

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“…1 These macrocycles have attracted considerable attention due to their promising photosensitive, 2 fluorescent, 3 non-linear optical 4 and oxidative properties. 5 Eight additional N atoms on the periphery of AzaPcs increase the polarities of these macrocycles, and substituents may be used to modify solubility, UV-Vis absorption, i.e., shifts of Q-bands, and acid-base properties. 6 Substituted AzaPcs are generally more soluble than the corresponding Pcs, and therefore they may have more technological applications.…”

Section: Introductionmentioning

confidence: 99%

Phthalocyanine and azaphthalocyanines containing eugenol: synthesis, DNA interaction and comparison of lipase inhibition properties

et al. 2017

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Novel eugenol-substituted zinc(II) azaphthalocyanines (ZnAzaPcs) were synthesised and their lipase inhibition and DNA binding properties compared with phthalocyanines (Pcs) containing eugenol. This is the first study on lipase inhibition and DNA binding of Pcs and AzaPcs containing a pharmacophore group, such as eugenol. The novel ZnAzaPcs were characterised using a combination of FT-IR, 1 H NMR, 13 C NMR, UV-Vis, MS and elemental analysis. The crystal structures of two pyrazine compounds were also determined by the single crystal diffraction technique. This study showed that two phthalocyanines compounds (3a and 4a) could be potential lipase inhibitor agents due to greater hydrophobicity than other azaphtalocyanines. Compound 4a displayed lowest IC 50 value. Non-intercalative binding to DNA was identified only for compound 2a.

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“…Por razões ecológicas, nos últimos anos esses agentes têm sido substituídos quimicamente por peróxido de hidrogênio e O 2 . 2 Entre esses processos destacam-se os processos oxidativos avançados (POAs), 3 que consistem na geração de radicais…”

Section: Introductionunclassified

Nióbia sintética modificada como catalisador na oxidação de corante orgânico: utilização de H2O2 e O2 atmosférico como oxidantes

et al. 2009

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Recebido em 22/2/08; aceito em 28/1/09; publicado na web em 25/6/09 MODIFIED SYNTHETIC NIOBIA AS CATALYST IN THE OXIDATION OF ORGANIC DYE: UTILIZATION OF H 2 O 2 AND ATMOSPHERIC O 2 AS OXIDANTS. In this work synthetic niobia was used to promote the oxidation of methylene blue dye in aqueous medium. The niobia was characterized by N 2 adsorption/desorption, XRD and TG measurements. The presence of reactive species on the niobia surface strongly increased the oxidation rate of the methylene blue dye. The reaction mechanism was studied by ESI-MS suggesting that the oxidation of the organic dye involve oxidizing species generated mainly after previous treatment with H 2 O 2 . It can be observed that the catalyst is a good material in the activation of gas (atmospheric oxygen) or liquid (hydrogen peroxide) oxidant agent with a total discoloration of the dye solution after only 1 h of reaction.Keywords: niobia; ESI-MS; oxidation process. INTRODUÇÃOOs corantes têxteis representam a principal fonte de poluição por compostos coloridos, uma vez que aproximadamente 15% são perdidos nos efluentes durante o processo de tingimento. A contaminação por esses compostos provoca efeitos danosos à vida aquática, causando sérios problemas ambientais. 1 Atualmente, as indústrias têxteis utilizam uma combinação de processos físicos envolvendo coagulação e sedimentação dos corantes com subsequente adsorção em carvão ativado. Esses sistemas de tratamento têm recebido diversas críticas, uma vez que não promovem a destruição do composto orgânico, ocorrendo apenas a transferência de fase. Dessa forma, diferentes trabalhos têm sido desenvolvidos empregando técnicas oxidativas visando mineralizar esses compostos.Inicialmente os poluentes orgânicos eram oxidados utilizandose principalmente compostos inorgânicos e metálicos como agentes oxidantes. Por razões ecológicas, nos últimos anos esses agentes têm sido substituídos quimicamente por peróxido de hidrogênio e O 2 .2 Entre esses processos destacam-se os processos oxidativos avançados (POAs), 3 que consistem na geração de radicais• OH, que apresentam alta capacidade oxidativa. Os POAs apresentam diversas vantagens com relação a outras tecnologias como: introduzem importantes modificações no substrato, em grande número de casos levando a sua mineralização completa (CO 2 , H 2 O e ácidos inorgânicos); podem ser aplicados no tratamento de contaminantes em concentrações muito baixas e, por fim, com exceção de alguns processos que podem envolver precipitação (óxidos férricos, por exemplo), os processos oxidativos avançados não geram resíduos. 4 Dentre os POAs, o sistema Fenton convencional (H 2 O 2 e íons Fe 2+ ) é largamente empregado no tratamento de efluentes. No entanto, esse sistema apresenta algumas desvantagens como, por exemplo, a formação de grande quantidade de lodo e o rigoroso controle de pH do meio reacional para evitar a precipitação dos íons férricos e garantir a eficiência do processo. 5,6 Na busca de novos catalisadores, que apresentem eficiência e baixo custo, os materiais conte...

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Cobalt 4-octasulfophenyltetrapyrazinoporphyrazine as a catalyst for the oxidation of organic substrates with atmospheric oxygen

Cited by 21 publications

References 7 publications

Tetrapyrazinoporphyrazines and their metal derivatives. Part I: Synthesis and basic structural information

Tetrapyrazinoporphyrazines and their metal derivatives. Part I: Synthesis and basic structural information

Phthalocyanine and azaphthalocyanines containing eugenol: synthesis, DNA interaction and comparison of lipase inhibition properties

Nióbia sintética modificada como catalisador na oxidação de corante orgânico: utilização de H2O2 e O2 atmosférico como oxidantes

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