Photodechlorination of mono and polychlorobenzenes by reductive photosensitization

Julliard, Michel; Chanon, Michel; Galadi, A.

doi:10.1016/1010-6030(94)03811-2

Cited by 15 publications

(2 citation statements)

References 46 publications

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“…A wide range of photochemical techniques have been reported for the treatment of wastewater [50]. A number of photochemical decompositions of chlorinated hazardous compounds have been reported such as mono and polychlorobenzenes [51]. The photocatalytic degradation of CHCl 3 , CHBr 3 , CCl 4 and CCl 3 CO 2 has been investigated by Choi and Hoffmann [52] in aqueous TiO 2 suspension.…”

Section: Halo Compoundsmentioning

confidence: 99%

Photocatalytic Degradation of Organic Pollutants: A Review

Ameta¹,

Benjamin²,

Ameta

et al. 2012

MSF

113

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Water pollution is increasing at an ever increasing pace and the whole world is in the cancerous grip of this pollution. Various industries are discharging their untreated effluents into the nearby water resources; thus, adding to the existing water pollution to a great extent. Hence, there is a pressing demand to develop an alternate technology for wastewater treatment and in this context; photocatalysis has emerged as an Advanced Oxidation Process with green chemical approach for such a treatment. This chapter deals with photocatalytic degradation of different kinds of organic pollutants; mainly surfactants, pesticides, dyes, phenols, chloro compounds, nitrogen containing compounds etc. Mechanisms of their degradation have also been discussed with hydroxyl and allied radicals as the main active oxidizing species.

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Section: Halo Compoundsmentioning

confidence: 99%

Photocatalytic Degradation of Organic Pollutants: A Review

Ameta¹,

Benjamin²,

Ameta

et al. 2012

MSF

113

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“…The majority of these compounds are chlorinated and brominated. They are confirmed to have significant toxicological effects in liver, kidney and even the central nervous system of human 6,7 . Hydrated electron addition to halogenated aromatic carbons is known to liberate halogen ion by dissociative electron capture process due to the high electron affinity of the halogen 8,9 .…”

Section: Introductionmentioning

confidence: 92%

Debromination of Bromobenzene Induced by Hydrated Electrons in Aqueous Solution

Huang¹,

Pan²,

Jin³

et al. 2014

Asian J. Chem.

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The nanosecond laser flash photolysis (LFP) experiments were adopted to investigate the kinetics and mechanisms of the reaction between bromobenzene and hydrated electrons (eaq) in aqueous solution. The results showed that the rate constants of first-order and second-order reaction were 6.3 × 10 5 s -1 and 1.7 × 10 10 L mol -1 s -1 , respectively. The final products were biphenyl, bromobiphenyl and Br -, which determined by gas chromatography-mass spectrometry (GC-MS) and ion chromatography (IC). The optimal structure of bromobenzene anion radicals, the bond lengths and bond angles were calculated and analyzed by time-dependent density functional theory (TD-DFT)-UB3LYP method and the primary absorption peaks of the anion radicals lied in the ranges of 250-600 nm. The main reaction pathway was speculated that bromobenzene molecules generated unstable anion radicals when attacked by hydrated electrons and then the molecules debrominated to generate benzene radicals and Br -.

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Photo Induced Radical Reactions

Pérez‐Prieto

Miranda

2012

Encyclopedia of Radicals in Chemistry, Biology and Materials

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This article discusses a number of reactions of potential synthetic interest occurring through photochemically generated organic radicals. Emphasis is placed on the nature of the resulting photoproducts, whose formation is discussed on a mechanistic basis. If available, experimental evidence (obtained by laser flash photolysis or related time‐resolved techniques) is provided. The material is organized according to the reaction types, for instance, homolytic cleavage, mesolytic cleavage, radical addition, and oxidative or reductive electron transfer. In addition to the classical carboncarbon or carbonhydrogen bond breaking processes, such as the Norrish type I reaction, the hydrogen abstraction, and the photo‐Fries or the photo‐Claisen rearrangements, a number of carbonheteroatom and heteroatomheteroatom cleavage processes are also covered. At the end of the article, a short section is included that deals with the experimental techniques for the characterization of photochemically generated radicals.

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Photodechlorination of mono and polychlorobenzenes by reductive photosensitization

Cited by 15 publications

References 46 publications

Photocatalytic Degradation of Organic Pollutants: A Review

Photocatalytic Degradation of Organic Pollutants: A Review

Debromination of Bromobenzene Induced by Hydrated Electrons in Aqueous Solution

Photo Induced Radical Reactions

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