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Catalytic activity of a dinuclear manganese complex (MnMeTACN) on the oxidation of ethyl linoleate

Paper ID Volume ID Publish Year Pages File Format Full-Text
43826 45990 2007 6 PDF Available
Title
Catalytic activity of a dinuclear manganese complex (MnMeTACN) on the oxidation of ethyl linoleate
Abstract

Catalytic activity of a dinuclear manganese-based complex [Mn2IV(μ-O)3L2](PF6)2 (MnMeTACN) (L = 1,4,7-trimethyl-1,4,7-triazacyclononane), and its combination with a polyamine, 1,1,4,7,10,10-hexamethyltriethylenetetramine (HMTETA), was investigated on the oxidation of ethyl linoleate (EL). When MnMeTACN was molecularly mixed with EL in a co-solvent (methanol), MnMeTACN alone was found to be a very active catalyst for the oxidation of unpurifed EL (containing a small amount of hydroperoxides), similar to the catalytic activity of a Co-based catalyst. For purified EL (free of hydroperoxides), the addition of tert-butyl hydroperoxide was necessary to rapidly initiate the EL oxidation. A tentative catalytic cycle for MnMeTACN was proposed on the basis of electrospray ionization mass spectrometry (ESI-MS) investigation. The existence of HMTETA significantly accelerated the decomposition of the formed hydroperoxides into alkoxy free radicals, which in turn led to a high level of volatile aldehyde byproducts due to β-scission reactions.

Graphical abstractThe catalytic activity of a dinuclear manganese-based complex, [MnIV2(μ-O)3L2](PF6)2 (MnMeTACN) on the oxidation of ethyl linoleate (EL) was found to be similar to that of a Co-based catalyst. The presence of hydroperoxide was necessary to rapidly initiate the EL oxidation. A tentative catalytic cycle for MnMeTACN was proposed on the basis of ESI-MS investigation. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Alkyd coating; Mn-catalyst; Oxidation; Hydroperoxide; Catalytic activity
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Catalytic activity of a dinuclear manganese complex (MnMeTACN) on the oxidation of ethyl linoleate
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 316, Issue 2, 10 January 2007, Pages 191–196
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
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