Oxidation of 2,6-Di-tert-Butylphenol Catalyzed by [5,10,15,20-Tetrakis(4-carboxyphenyl)porphyrinato]cobalt(II) in the Presence of Various Oxidants

Year 2017, Volume: 21 Issue: 6, 1307 - 1316, 01.12.2017

Yasemin Çimen , Tuğçe Günay

https://doi.org/10.16984/saufenbilder.290357

Abstract

In this study, the
oxidation of 2,6-di-tert-butylphenol (DTBP) catalyzed by [5,10,15,20-tetrakis(4-carboxylphenyl)porphyrinato]cobalt(II) ([CoTCPP]) in the
presence of various oxidants has been investigated. Potassium peroxymonosulfate
(Oxone), tert-butylhydroperoxide (Bu^tOOH) or hydrogen
peroxide (H₂O₂) were used as oxidants and the reactions
were carried out in 10-15% (v:v) of water-methanol solutions at room
temperature. The effects of the concentration of the substrate, catalyst and
oxidant on the outcome of the reactions were investigated. The products of the
reaction mixtures were identified using GC-MS and the amounts of the products and
unreacted DTBP were determined from the peak areas on GC chromatograms.
[CoTCPP] showed catalytic activity in the oxidation of DTBP when Oxone or Bu^tOOH
was used as oxidant. No catalytic activity of [CoTCPP] was observed when the oxidant
was H₂O₂.

Keywords

Oxidation, [tetrakis(4-carboxyphenyl)porphyrinato, cobalt(II), 2, 6-Di-tert-butylphenol

2,6-Di-tert-Bütilfenolün Çeşitli Oksidantlarla [5,10,15,20 Tetrakis(4 karboksifenil)porfirinato]kobalt(II) Katalizörlüğünde Oksidasyonu

Abstract

Bu çalışmada 2,6-di-tert-bütilfenolün
(DTBP) çeşitli oksidantlarla [5,10,15,20-tetrakis(4-karboksifenil)porfirinato]kobalt(II)
([CoTCPP]) tarafından katalizlenen oksidasyonu araştırılmıştır. Oksidant olarak
potasyum peroksimonosülfat (okzon), tert-bütilhidroperoksit
(Bu^tOOH) veya hidrojen
peroksit (H₂O₂) kullanılmış ve reaksiyonlar hacimce
%10-15 su içeren metanol çözeltilerinde oda sıcaklığında yürütülmüştür. Oksidasyona
substrat, katalizör ve oksidant derişimlerinin etkileri incelenmiştir.
Reaksiyon ürünleri gaz kromatografisi-kütle spektrometresiyle (GC-MS)
belirlenmiş ve ürünlerin ve reaksiyona girmemiş DTBP miktarları gaz
kromatografisi (GC) ile elde edilen kromatogramlardaki pik alanlarından
belirlenmiştir. DTBP oksidasyonunda oksidant olarak okzon ve Bu^tOOH kullanıldığında [CoTCPP]
katalitik aktivite göstermiştir. H₂O₂ varlığında ise
[CoTCPP] katalitik aktivite göstermemiştir.

Keywords

tetrakis(4-karboksifenil)porfirinato, kobalt(II), 2, 6-Di-tert-bütilfenol, Oksidasyon

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