Simple and Economic Spectrophotometric Method for Simultaneous Photosensitized Dechlorination and Decarboxylation of Isomeric Mono‐ and Dichlorobenzoic Acids

Pande, U. C.; Dwivedi, Ankur

doi:10.1155/2010/281987

Cited by 1 publication

(1 citation statement)

References 21 publications

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“…Obviously, there should be an optimal concentration of substrate (5×10 -5 M) for 2TBA degradation. The first-order kinetic constants k remaining constant in the concentration range shows that the reaction is independent of the initial concentration of the substrate 13 .…”

Section: Effect Of the Initial Concentration Of Substratementioning

confidence: 91%

Photoinduced Electron Transfer Reaction of 2-Thiobarbituric Acid and Methylene Blue: Mechanism and Kinetics

2013

Chem Sci Trans

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Abstract:Barbiturates are known to have hypnotic properties and are used as active moiety on central nervous system. Depends up on the experiments conditions and functional group present on the drugs, make the drugs labile to photodecomposition. The photosensitized reaction of 2-thiobarbituric acid (2TBA) with methylene blue (MB) in alkaline medium using visible light has been studied. 2TBA exists in protonated and deprotonated form in equilibrium in alkaline medium. Photosensitized electron transfer from the deprotonated 2TBA to excited state MB takes place and the energy is transferred to 2TBA molecule which undergoes chemical reaction. The interconversion of protonated form to deprotonated form during the reaction is observed. The rate of the reaction has been calculated and the effect of pH, concentration of the sensitizer, the light intensity on the rate of the reaction has been studied. The quantum efficiency of the photo chemical reaction is calculated using potassium ferrioxalate actinometer and the effect of the concentration of the substrate on the quantum efficiency is calculated. The reaction mechanism and the excited states involved have been suggested.

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Section: Effect Of the Initial Concentration Of Substratementioning

confidence: 91%

Photoinduced Electron Transfer Reaction of 2-Thiobarbituric Acid and Methylene Blue: Mechanism and Kinetics

2013

Chem Sci Trans

View full text Add to dashboard Cite

show abstract

Simple and Economic Spectrophotometric Method for Simultaneous Photosensitized Dechlorination and Decarboxylation of Isomeric Mono‐ and Dichlorobenzoic Acids

Cited by 1 publication

References 21 publications

Photoinduced Electron Transfer Reaction of 2-Thiobarbituric Acid and Methylene Blue: Mechanism and Kinetics

Photoinduced Electron Transfer Reaction of 2-Thiobarbituric Acid and Methylene Blue: Mechanism and Kinetics

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