Sensitized Photoreduction of Nitrate in Homogeneous and Micellar Solutions

Arthur J. Frank; Michael Grätzel

doi:10.1021/ic00140a047

Sensitized Photoreduction of Nitrate in Homogeneous and Micellar Solutions

Arthur J. Frank, Michael Grätzel

Chemistry and Nanoscience

National Renewable Energy Laboratory

Research output: Contribution to journal › Article › peer-review

26 Scopus Citations

Abstract

Two organic sensitizers (S), N-methylphenothiazine and N,N,N′,N′-tetramethylbenzidine, were found to reduce nitrate ions after excitation to the triplet state. The photoreduction is irreversible and follows the sequence [formula omitted] For every triplet state produced, two donor molecules are oxidized and one nitrate ion is reduced to nitrite. The reactions were examined in homogeneous (water-ethanol) and micellar solutions. Rate constants for the individual processes were determined by a laser flash photolysis technique, and a detailed account of the energetics of this light energy conversion and storage system is given.

Original language	American English
Pages (from-to)	3834-3837
Number of pages	4
Journal	Inorganic Chemistry
Volume	21
Issue number	10
DOIs	https://doi.org/10.1021/ic00140a047 https://doi.org/10.1021/ic00140a047
State	Published - 1982

NREL Publication Number

ACNR/JA-233-4585

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abstract = "Two organic sensitizers (S), N-methylphenothiazine and N,N,N′,N′-tetramethylbenzidine, were found to reduce nitrate ions after excitation to the triplet state. The photoreduction is irreversible and follows the sequence [formula omitted] For every triplet state produced, two donor molecules are oxidized and one nitrate ion is reduced to nitrite. The reactions were examined in homogeneous (water-ethanol) and micellar solutions. Rate constants for the individual processes were determined by a laser flash photolysis technique, and a detailed account of the energetics of this light energy conversion and storage system is given.",

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AU - Grätzel, Michael

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AB - Two organic sensitizers (S), N-methylphenothiazine and N,N,N′,N′-tetramethylbenzidine, were found to reduce nitrate ions after excitation to the triplet state. The photoreduction is irreversible and follows the sequence [formula omitted] For every triplet state produced, two donor molecules are oxidized and one nitrate ion is reduced to nitrite. The reactions were examined in homogeneous (water-ethanol) and micellar solutions. Rate constants for the individual processes were determined by a laser flash photolysis technique, and a detailed account of the energetics of this light energy conversion and storage system is given.

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U2 - 10.1021/ic00140a047

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M3 - Article

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JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 10

ER -

Sensitized Photoreduction of Nitrate in Homogeneous and Micellar Solutions

Abstract

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