The Chlorophyll-sensitized Photoöxidation of Phenylhydrazine by Methyl Red.

Livingston, Robert; Sickle, Dorothy; Uchiyama, Aiji

doi:10.1021/j150453a018

Cited by 15 publications

(2 citation statements)

References 6 publications

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“…This instrument was the property of the Bureau of Ordnance of the United States Navy and was kindly put at our disposal by Dr. Bryce L. Crawford 5. We are indebted to Dr. R. Arnold of the Division of Organic Chemistry, who suggested this procedure and placed the distilling column at our disposal.…”

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Reversible Photobleaching of Chlorophyll

McBrady¹,

Livingston²

1948

J. Phys. Chem.

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The reversible photobleaching of chlorophyll was discovered by Forre t and Rabinowitch in 1937 (7). Its existence was confirmed and it was further studied by Livingston in 1941 (4). Since the experiments, both photometric and chemical, are difficult, both the earlier and the present researches are more or less exploratory in character. The present results, while confirming some of the earlier findings, necessitate some modification of the mechanism suggested previously (1,4). EXPERIMENTAL METHODS AND MATERIALThe photometer 1 This work was made possible by the support of the Office of Naval Research (Contract N6ori-212, Task Order 1). It was also supported in part by a grant-in-aid from the Grad-

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confidence: 99%

Reversible Photobleaching of Chlorophyll

McBrady¹,

Livingston²

1948

J. Phys. Chem.

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“…The irreversible bleaching rate reaches half its limiting value at (02) 0.8 X 10-6 moles/liter. Insertion of these two data in the formula above leads to the value kt/k7 ss 0.4, and thus the numerical expression becomes: = (o.S X +"(0,)) X °•17 X 10-8 moles/liter/second (11) when the chlorophyll concentration is 2 X 10_ moles/liter. The numerical expression for reversible bleaching, calculated by a similar method, turns out to be:…”

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confidence: 99%

The Further Studies on the Reversible Photobleaching of Chlorophyll a.

Knight¹,

Livingston²

1950

J. Phys. Chem.

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The use of semiconductor electrodes in the study of photochemical reactions

Tributsch

Gerischer

1969

Ber Bunsenges Phys Chem

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Semiconductor electrodes can act either as donors or acceptors for electron exchange with excited molecules in the electrolyte. Unlike at metal surfaces, reaction with both the ground level and the excited level will not occur simultaneously provided that the semiconductor has a sufficiently large band gap. It is therefore possible to observe the injection of electrons or of holes into the semiconductor. The photocurrents produced in this way can be used to investigate the photochemical behaviour of the excited molecule. A series of examples is given in which the injected photocurrents are increased or decreased by simultaneously occurring reactions between the excited molecules and other species in the electrolyte. The interpretation of the observed effects is compatible with the notions concerning analogous homogeneous photochemical reactions.

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The Chlorophyll-sensitized Photoöxidation of Phenylhydrazine by Methyl Red.

Cited by 15 publications

References 6 publications

Reversible Photobleaching of Chlorophyll

Reversible Photobleaching of Chlorophyll

The Further Studies on the Reversible Photobleaching of Chlorophyll a.

The use of semiconductor electrodes in the study of photochemical reactions

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