Reduction of dioxygen to superoxide photosensitized by anthraquinone-2-sulphonate

Lang, Kamil; Wagnerová, D. M.; Stopka, Pavel; Damerau, W.

doi:10.1016/1010-6030(92)85228-m

Cited by 53 publications

(35 citation statements)

References 11 publications

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“…8, spectrum a) gave a four-line ESR spectrum with a density ratio of 1:2:2:1. These coupling constant values were in good agreement with the literature [23]. In aqueous solution O 2 ÿc underwent rapid dismutation to form H 2 O 2 and which then further transformed to OH c .…”

Section: Oh C Generationsupporting

confidence: 88%

Synthesis and Type I/Type II photosensitizing properties of a novel amphiphilic zinc phthalocyanine

et al. 2006

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Section: Oh C Generationsupporting

confidence: 88%

Synthesis and Type I/Type II photosensitizing properties of a novel amphiphilic zinc phthalocyanine

et al. 2006

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“…Photosensitizers producing superoxide are e.g. dicyanoanthracene [13] or derivatives of 1,10-anthraquinone sulfonate with low lying T(n,π*) orbitals [27]. Generation of 1 O 2 photosensitized by non-transition metal phthalocyanines and by porphyrins has been studied in context with photodynamic therapy of cancer [28Ϫ33].…”

Section: Resultsmentioning

confidence: 99%

Classification of Dioxygen Reactions: A Unifying View

Wagnerová¹

2001

Zeitschrift Für Physikalische Chemie

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Dioxygen Activation / Spin Conservation Rule / Photoinitiated Dioxygen Reactions / ClassificationDioxygen reactions in solution were classified into six classes according to two criteria, the way how the spin ban of dioxygen reaction is circumvented and origin of the activation energy Ϫ thermal energy or energy of the light quantum.Sauerstoff-Reaktionen werden in sechs Klassen gemäß zweier Kriterien klassifiziert: nach der Art auf welche das Spin-Verbot umgangen wird und nach dem Ursprung der Aktivierungsenergie Ϫ thermische Energie oder Energie des Lichtquantums.

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“…As the excited state of p-BQ is reduced by dioxygen to give superoxide ion [22], the p-BQ − anion radical can also degrade as:…”

Section: Discussionmentioning

confidence: 99%

Photooxidation of cobalt(II)meso-tetraphenylporphyrin by p-benzoquinone and its mechanism studied by optical absorption and resonance Raman spectroscopies

Thanga

Verma

2003

J. Porphyrins Phthalocyanines

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Laser excitation of Co II TPP within the Soret absorption band in the presence of pbenzoquinone (p-BQ) results in oxidation of the complex. Oxidation occurs both at the metal center and the porphyrin ring depending upon the experimental conditions. Under anaerobic conditions, oxidation takes place at the metal center to produce the cobaltic species Co III (TPP) + , while in the presence of molecular oxygen oxidation also occurs at the porphyrin ring giving Co III (TPP) 2+• cation radical as oxidation product. From the inhibiting effect of peroxy radical trapping agent on the photooxidation of Co II TPP under aerobic conditions, the two-electron oxidation is suggested to involve solvent radicals and we discuss the mechanistic details of the process in this work.

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Reduction of dioxygen to superoxide photosensitized by anthraquinone-2-sulphonate

Cited by 53 publications

References 11 publications

Synthesis and Type I/Type II photosensitizing properties of a novel amphiphilic zinc phthalocyanine

Synthesis and Type I/Type II photosensitizing properties of a novel amphiphilic zinc phthalocyanine

Classification of Dioxygen Reactions: A Unifying View

Photooxidation of cobalt(II)meso-tetraphenylporphyrin by p-benzoquinone and its mechanism studied by optical absorption and resonance Raman spectroscopies

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