Journal
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Volume 423, Issue -, Pages 489-494Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molcata.2015.10.025
Keywords
Polycarbonates; Cyclic carbonates; Metalloporphyrins; Manganese(III); Carbon dioxide
Categories
Funding
- Ministerio de Economia y Competitividad [CTQ2013-43438-R]
- Departament d'Economia i Coneixement (Generalitat de Catalunya) [2014SGR 670]
- FCT-Portugal (Portuguese Foundation for Science and Technology)
- FEDER-European Regional Development Fund through the COMPETE Programme (Operational Programme for Competitiveness) [UID/QUI/00313/2013]
- [SFRH/BD/84146/2012]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/84146/2012] Funding Source: FCT
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Introduction of halogen electron withdrawing atoms (chloro and fluoro) in the ortho position of the aryl groups of meso-tetraphenylporphyrin manganese(III) complexes increased their activity as catalysts in the reaction of carbon dioxide with epoxides, when compared with the meso-tetraphenylporphyrin manganese(III) counterpart, even in the absence of co-catalysts. In the polymerization reaction of carbon dioxide and cyclohexene oxide, almost ten-fold increase of the TOF was observed when 5,10,15,20-tetra(2,6-dichlorophenyl)porphyrinatomanganese(III) acetate or 5,10,15,20-tetra(2,6-difluorophenyl)porphyrinatomanganese(III) acetate complexes were used as catalysts. Under similar conditions, when terminal epoxides were used as substrates, the selective cycloaddition of CO2 with styrene oxide, epichlorohydrin, propylene oxide, and 1,2-epoxytetradecane yielded exclusively the corresponding cyclic carbonates (conversion 6-98%). (C) 2016 Published by Elsevier B.V.
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