Copper-phthalocyanine coordination polymer as a reusable catechol oxidase biomimetic catalyst

Autor(es)

Castro, Kelly A. D. F. ^{[1, 2, 3]} ; Figueira, Flavio ^{[1, 3, 4]} ; Almeida Paz, Filipe A. ^[4] ; Tome, Joao P. C. ^{[1, 3, 5]} ; da Silva, Roberto S. ^[2] ; Nakagaki, Shirley ^{[6, 7]} ; Neves, M. Graca P. M. S. ^{[1, 3]} ; Cavaleiro, Jose A. S. ^{[1, 3]} ; Simoes, Mario M. Q. ^{[1, 3]}

Afiliação do(s) autor(es)

^[1] Univ Aveiro, Dept Chem, QOPNA, P-3810193 Aveiro - Portugal

^[2] Univ Sao Paulo, Fac Pharmaceut Sci, Ribeirao Preto - Brazil

^[3] Univ Aveiro, Dept Chem, LAQV REQUIMTE, P-3810193 Aveiro - Portugal

^[4] CCICECO Aveiro Inst Mat, Dept Chem, P-3810193 Aveiro - Portugal

^[5] Univ Lisbon, Inst Super Tecn, Dept Engn Quim, Ctr Quim Estrutural, Ave Rovisco Pais 1, P-1049001 Lisbon - Portugal

^[6] Univ Fed Parana, Lab Bioinorgan & Catalysis, Curitiba, Parana - Brazil

^[7] Univ Fed Parana, Dept Chem, Curitiba, Parana - Brazil

• Tipo de documento: Artigo Científico
• Fonte: DALTON TRANSACTIONS; v. 48, n. 23, p. 8144-8152, JUN 21 2019.
• Citações Web of Science: 0

Resumo

The development of selective, efficient, and recoverable/reusable catalysts for oxidation reactions has become one of the main challenges of modern chemistry. Considering our interest in efficient catalytic systems based on porphyrin (Por) and phthalocyanine (Pc) coordination polymers, we report here the synthesis, characterization and catalytic activity of a new Pc coordination polymer (coined hereafter as Cu4CuPcSPy). The new Pc material was obtained in excellent yield, from the reaction of H2PcSPy with an excess amount of copper(ii) acetate. The catalytic efficiency of Cu4CuPcSPy was evaluated in the oxidation of 3,5-di-tert-butylcatechol (3,5-DTBC) in the presence of molecular oxygen from air, with or without the addition of aqueous 30% hydrogen peroxide. The comparison between the homogeneous (CuPcSPy) and the heterogeneous (Cu4CuPcSPy) catalytic systems showed a better performance for the Cu4CuPcSPy material, that can be recovered by filtration and reused, maintaining its activity roughly unchanged during three catalytic cycles. An increment of approximately 30% was also verified in the catalytic activity of the homogeneous and heterogeneous systems by adding aqueous hydrogen peroxide to the catalytic reactions. (AU)

• Processo FAPESP: 16/12707-0 - Citotoxicidade e foto-citotoxicidade de compostos rutênio-ftalocianinas como produtores de óxido nítrico e oxigênio singleto em linhagens de células cancerígenas. Proposta para uma nova classe de metalo-drogas
• Beneficiário: Roberto Santana da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Regular