Efficient and selective hydrogen peroxide-mediated oxidation of sulfides in batch and segmented and continuous flow using a peroxometalate-based polymer immobilised ionic liquid phase catalyst
Data(s) |
01/03/2015
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Resumo |
<p>The peroxometalate-based polymer immobilized ionic liquid phase catalyst [PO4{WO(O-2)(2)}(4)]@PIILP has been prepared by anion exchange of ring opening metathesis-derived pyrrolidinium-decorated norbornene/ cyclooctene copolymer and shown to be a remarkably efficient system for the selective oxidation of sulfides under mild conditions. A cartridge packed with a mixture of [PO4{WO(O-2)(2)}(4)]@PIILP and silica operated as a segmented or continuous flow process and gave good conversions and high selectivity for either sulfoxide (92% in methanol at 96% conversion for a residence time of 4 min) or sulfone (96% in acetonitrile at 96% conversion for a residence time of 15 min). The immobilized catalyst remained active for 8 h under continuous flow operation with a stable activity/selectivity profile that allowed 6.5 g of reactant to be processed (TON = 46 428) while a single catalyst cartridge could be used for the consecutive oxidation of multiple substrates giving activity-selectivity profiles that matched those obtained with fresh catalyst.</p> |
Formato |
application/pdf |
Identificador |
http://dx.doi.org/10.1039/c4gc01770f http://pure.qub.ac.uk/ws/files/16235334/effecient_and_selective.pdf |
Idioma(s) |
eng |
Direitos |
info:eu-repo/semantics/openAccess |
Fonte |
Doherty , S , Knight , J G , Carroll , M A , Ellison , J R , Hobson , S J , Stevens , S , Hardacre , C & Goodrich , P 2015 , ' Efficient and selective hydrogen peroxide-mediated oxidation of sulfides in batch and segmented and continuous flow using a peroxometalate-based polymer immobilised ionic liquid phase catalyst ' Green Chemistry , vol 17 , no. 3 , pp. 1559-1571 . DOI: 10.1039/c4gc01770f |
Palavras-Chave | #LAYERED DOUBLE HYDROXIDES #MILD OXIDATION #ROOM-TEMPERATURE #DEEP DESULFURIZATION #SULFUR HETEROCYCLES #SULFOXIDES #H2O2 #SULFONES #FUELS #VANADIUM |
Tipo |
article |