Detail of "2441-46-5"

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Photochemical properties of the triplet p,p* state, anion and ketyl radicals of 5,12-naphthacenequinone in solution studied by laser flash photolysis: electron transfer and phenolic H-atom transfer

Some chemicals with cas registry numbers like 2441-46-5 are also used. Photochemical properties of the triplet p,p* state, anion and ketyl radicals of 5,12-naphthacenequinone in solution studied by laser flash photolysis: electron transfer and phenolic H-atom transfer. Yamaji, Minoru; Itoh, Takao; Tobita, Seiji (Department of Chemistry, Gunma University, Kiryu, Japan). Photochemical & Photobiological Sciences, 1(11), 869-876 (English) 2002 Royal Society of Chemistry. CODEN: PPSHCB. ISSN: 1474-905X. DOCUMENT TYPE: Journal CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) Section cross-reference(s): 22 Photochem. properties of the lowest triplet p,p* state of 5,12-naphthacenequinone (5,12-NQ) have been investigated in soln. by means of nanosecond laser flash photolysis at 295 K. The transient absorption spectrum of triplet 5,12-NQ was measured in CCl4 and the molar absorption coeff. was detd. In CCl4, triplet 5,12-NQ is shown to be quenched by the ground-state 5,12-NQ. In acetonitrile, triplet 5,12-NQ is quenched by 1,2,4,5-tetramethoxybenzene (TMB) via electron transfer to produce the TMB cation and 5,12-NQ anion radicals. The absorption spectrum and the molar absorption coeff. of the 5,12-NQ anion radical were detd. based on those of the TMB cation radical. Although triplet 5,12-NQ does not abstr. H-atom of ethanol or cyclohexane, H-atom transfer occurs from phenol and p-phenylphenol to triplet 5,12-NQ, producing the 5,12-NQ ketyl radical. The absorption spectrum and the molar absorption coeff. of the 5,12-NQ ketyl radical were detd. 2441-46-5 which is the cas registry number is also used here. based on those of the p-phenylphenoxyl radical. It is shown that the quenching rate consts. by phenol for triplet 5,12-NQ and other triplet para-quinones previously reported obey a Rehm-Weller relationship. The mechanism for the phenolic H-atom transfer to triplet para-quinones is interpreted in terms of coupled electron and proton transfer. ..

Photochemical properties of the triplet p,p* state, anion and ketyl radicals of 5,12-naphthacenequinone in solution studied by laser flash photolysis: electron transfer and phenolic H-atom transfer

Some chemicals with cas registry numbers like 2441-46-5 are also used. Photochemical properties of the triplet p,p* state, anion and ketyl radicals of 5,12-naphthacenequinone in solution studied by laser flash photolysis: electron transfer and phenolic H-atom transfer. Yamaji, Minoru; Itoh, Takao; Tobita, Seiji (Department of Chemistry, Gunma University, Kiryu, Japan). Photochemical & Photobiological Sciences, 1(11), 869-876 (English) 2002 Royal Society of Chemistry. CODEN: PPSHCB. ISSN: 1474-905X. DOCUMENT TYPE: Journal CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) Section cross-reference(s): 22 Photochem. properties of the lowest triplet p,p* state of 5,12-naphthacenequinone (5,12-NQ) have been investigated in soln. by means of nanosecond laser flash photolysis at 295 K. The transient absorption spectrum of triplet 5,12-NQ was measured in CCl4 and the molar absorption coeff. was detd. In CCl4, triplet 5,12-NQ is shown to be quenched by the ground-state 5,12-NQ. In acetonitrile, triplet 5,12-NQ is quenched by 1,2,4,5-tetramethoxybenzene (TMB) via electron transfer to produce the TMB cation and 5,12-NQ anion radicals. The absorption spectrum and the molar absorption coeff. of the 5,12-NQ anion radical were detd. based on those of the TMB cation radical. Although triplet 5,12-NQ does not abstr. H-atom of ethanol or cyclohexane, H-atom transfer occurs from phenol and p-phenylphenol to triplet 5,12-NQ, producing the 5,12-NQ ketyl radical. The absorption spectrum and the molar absorption coeff. of the 5,12-NQ ketyl radical were detd. 2441-46-5 which is the cas registry number is also used here. based on those of the p-phenylphenoxyl radical. It is shown that the quenching rate consts. by phenol for triplet 5,12-NQ and other triplet para-quinones previously reported obey a Rehm-Weller relationship. The mechanism for the phenolic H-atom transfer to triplet para-quinones is interpreted in terms of coupled electron and proton transfer. ..