Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/7365
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dc.contributor.authorMartins, Luísa Margarida D. R. S.-
dc.contributor.authorHazra, Susanta-
dc.contributor.authorda Silva, M. Fátima C. Guedes-
dc.contributor.authorPombeiro, Armando J. L.-
dc.date.accessioned2017-09-05T13:39:14Z-
dc.date.available2017-09-05T13:39:14Z-
dc.date.issued2016-
dc.identifier.citationMARTINS, L.M.D.R.S. [et al] - A sulfonated Schiff base dimethyltin(IV) coordination polymer: synthesis, characterization and application as a catalyst for ultrasound- or microwave-assisted Baeyer–Villiger oxidation under solvent-free conditions. RSC Advances. ISSN: 2046-2069. Vol. 6, Nº.81, (2016), pp. 78225-78233pt_PT
dc.identifier.issn2046-2069-
dc.identifier.urihttp://hdl.handle.net/10400.21/7365-
dc.description.abstractThe synthesis and crystal structure of the new dimethyltin(IV) compound [SnMe2(HL)(CH3OH)]n$(0.5nCH3OH) (1) derived from the Schiff base 2-[(2,3-dihydroxyphenyl) methylideneamino]benzenesulfonic acid (H3L) are described. Despite having six potentially donating centres (one imine nitrogen, two phenoxo and three sulfonate oxygen atoms), the monoprotonated dianionic ligand (HL2) behaves as an O,O,O-tridentate chelator. Single crystal X-ray diffraction revealed that 1 is a 1D coordination polymer with every tin(IV) ion bound to two methyl groups, a methanol molecule, two Ophenoxo and one m-Osulfonate atom from HL2. The coordination polymer 1 was applied as a heterogeneous catalyst for the Baeyer–Villiger oxidation of ketones to esters orlactones, using aqueous hydrogen peroxide as oxidant, under ultrasound (US) or microwave (MW) irradiation and solvent- and additive-free conditions. Overall conversions up to 76/82, 98/93, 93/89, 91/94, 83/90, 68/62 and 81/87% under US/MW irradiations were obtained with 3,3-dimethyl-2-butanone, cyclopentanone, 2-methylcyclopentanone, cyclohexanone, 3-methylcyclohexanone, benzophenone and acetophenone, respectively. The catalyst can be recycled up to five cycles without losing appreciable activity.pt_PT
dc.description.sponsorshipUID/QUI/00100/2013-
dc.description.sponsorshipPTDC/QEQERQ/1648/2014-
dc.language.isoengpt_PT
dc.publisherRoyal Society of Chemistrypt_PT
dc.rightsclosedAccesspt_PT
dc.titleA sulfonated Schiff base dimethyltin(IV) coordination polymer: synthesis, characterization and application as a catalyst for ultrasound- or microwave-assisted Baeyer–Villiger oxidation under solvent-free conditionspt_PT
dc.typearticlept_PT
dc.peerreviewedyespt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
degois.publication.firstPage78225pt_PT
degois.publication.lastPage78233pt_PT
degois.publication.issue81pt_PT
degois.publication.titleRSC Advancespt_PT
degois.publication.volume6pt_PT
dc.identifier.doi10.1039/c6ra14689apt_PT
Aparece nas colecções:ISEL - Eng. Quim. Biol. - Artigos

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