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Photoreduction of nitro-1,4-naphthoquinones in solution

Paper ID Volume ID Publish Year Pages File Format Full-Text
27336 44016 2011 6 PDF Available
Title
Photoreduction of nitro-1,4-naphthoquinones in solution
Abstract

The photolysis of 2,3-dichloro-n-nitro-1,4-naphthoquinones (nitroN’Q, n: 5 and 6) was studied in benzene and acetonitrile. The triplet states of both nitroN’Qs, which can be quenched by H-atom donating solvents, e.g. 2-propanol or 1-phenylethanol, were characterized by flash photolysis. Formation and decay of nitronaphthoquinone radicals, due to H-atom transfer, were observed; the reactivities of the donors were examined and the mechanistic aspects discussed. The photoreduction of 6-nitroN’Q in the presence of the donors is efficient in contrast to 5-nitroN’Q. The major product is considered to be 6-hydroxylaminoN’Q.

► The photochemistry of 2,3-dichloro-6-nitro-1,4-naphthoquinones (6-nitroN’Q) was studied in acetonitrile. ► The triplet state is quenched by 2-propanol or 1-phenylethanol. ► Nitronaphthoquinone radicals were observed. ► The major suggested product is 6-hydroxylaminoN’Q.

Keywords
Photoreduction; Nitro-1,4-naphthoquinone; Triplet; Radical
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 224, Issue 1, 15 November 2011, Pages 135–140
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
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Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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