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Selective oxidation of DDT by dioxygen on the dioxo-Mo(VI) complex anchored on a TiO2 under UV-irradiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
49379 46740 2015 3 PDF Available
Title
Selective oxidation of DDT by dioxygen on the dioxo-Mo(VI) complex anchored on a TiO2 under UV-irradiation
Abstract

•MoVIO2Cl2L/TiO2 complex is a catalyst for photooxidation of DDT by O2.•The main product is dicofol (21%) and the conversion is 35% for 32 h reaction.•The oxo-atom transfer of MoVI to the bibenzylic-carbon of DDT is primary reaction.•Catalytic cycle includes re-oxidation of MoIV to MoVI by O2 in the “dark” reaction.

Oxidation of DDT (1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane) by the dioxo-Mo(VI) complex (dioxo-molybdenum(VI)-dichloro[4,4′-dicarboxylato-2,2′-bipyridine]), anchored on a TiO2, in the presence of dioxygen under UV-irradiation (λ = 253.7 nm) in acetonitrile suspension has been examined. The reaction has catalytic character. Conversion of DDT (35% for 32 h reaction) to dicofol (2,2,2-trichloro-1,1-bis(4-chlorophenyl)ethanol, 21%) and a great number of other chlorinated and non-chlorinated products of the oxidative/reductive decomposition proceeds by the primary reaction of oxo-atom transfer from dioxo-Mo(VI) complex to bibenzylic–carbon atom of DDT. The catalytic cycle is performed via the re-oxidation of the reduced Mo(IV) into Mo(VI) by dioxygen in the “dark” reaction.

Graphical abstractReaction of O = MoVI(O)(Cl2)|[L]/TiO2 with DDT, L is 4,4′-dicarboxylato-2,2′-bipyridine.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Catalytic oxidation; Dioxo-Mo(VI)-complex anchored on a TiO2; DDT; Dicofol
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Selective oxidation of DDT by dioxygen on the dioxo-Mo(VI) complex anchored on a TiO2 under UV-irradiation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 69, 5 September 2015, Pages 193–195
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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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Online Support
Any Questions? feel free to contact us