Publication
Sisal-derived acid-char molybdenum catalyst for reductive deoxygenation of sulfoxides
| dc.contributor.author | Duarte, Tiago A. G. | |
| dc.contributor.author | Mestre, Ana S. | |
| dc.contributor.author | Ferreira, Maria J. G. | |
| dc.contributor.author | Rego, Ana M. Botelho do | |
| dc.contributor.author | Ferraria, Ana M. | |
| dc.contributor.author | Kirillova, Marina V. | |
| dc.contributor.author | Carvalho, Ana P. | |
| dc.contributor.author | Calhorda, Maria José | |
| dc.contributor.author | Fernandes, Tiago | |
| dc.date.accessioned | 2025-01-28T19:44:24Z | |
| dc.date.available | 2025-01-28T19:44:24Z | |
| dc.date.issued | 2023-09-30 | |
| dc.description.abstract | The deoxygenation of sulfoxides is a rather important reaction from both synthetic and biological points of view, due to the potential of sulfides as intermediates in a variety of processes. Homogenous Mo-based catalysts successfully perform the reduction of diphenyl sulfoxide to diphenyl sulfide with high yields but present the well-known limitations regarding recovery and recycling. Thus, in the present work, two new supported catalysts were prepared through the immobilization of molybdenum precursor species (dichlorodioxodi(aquo)molybdenum(VI) and sodium molybdate), onto a sisal-derived acid-char (S13.5), obtained from rope industry wastes by acid-mediated carbonization. The heterogeneous Mo-based materials were characterized by IR spectroscopy, elemental analysis, ICP, solid state NMR, XPS, and SEM, and were evaluated as catalysts for the reduction of sulfoxides to sulfides in the presence of phenylsilane as reducing agent under different reaction conditions. The influence of various experimental parameters, including reducing agent type and amount, solvent type, and acid promoter were investigated. Catalytic studies revealed that both catalysts deoxygenate sulfoxides at 120 °C in toluene solution with high yields (up to 97%). The MoO2Cl2 derived catalyst shown to be highly efficient in the reduction of diaryl, alkylaryl, dibenzyl, and dialkyl sulfoxides to the corresponding sulfoxides using phenylsilane as reductant and no need of acid promoter. | eng |
| dc.description.sponsorship | This work was supported by Fundaçao ˜ para a Ciˆencia e a Tecnologia (FCT) through projects PEst-OE/FIS/UI0261/2014, PEst-OE/MULTI/ UI0612/2013, UIDB/04046/2020 and UIDP/04046/2020 (BioISI), UIDB/00100/2020 and UIDP/00100/2020 (CQE), Lisboa-01–2020, LA/P/0056/2020 (IMS), UIDB/04565/2020, UIDP/04565/2020 (iBB), LA/P/0140/2020 (i4HB) and 0145FEDER-022125-IST/RNEM. TAF thanks CQB and FCT for a fellowship (PEst-OE/MULTI/00612/2013) and CEECIND/02725/2018 contract. ASM thanks FCT for the CEECIND/01371/2017 contract (Embrace Project). AMF thanks FCT and IST, Portugal, for contract no. IST-ID/131/2018. The authors thank Isabel Dias Nogueira for acquisition and refinement of SEM images. We thank Eng. Mário Dias (LAIST) for ICP-OES experimental assistance. | |
| dc.description.version | info:eu-repo/semantics/publishedVersion | pt_PT |
| dc.identifier.doi | 10.1016/j.cattod.2023.114388 | pt_PT |
| dc.identifier.uri | http://hdl.handle.net/10400.2/19431 | |
| dc.language.iso | eng | pt_PT |
| dc.peerreviewed | yes | pt_PT |
| dc.publisher | Elsevier | pt_PT |
| dc.title | Sisal-derived acid-char molybdenum catalyst for reductive deoxygenation of sulfoxides | eng |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 114388 | pt_PT |
| oaire.citation.startPage | 114388 | pt_PT |
| oaire.citation.title | Catalysis Today | pt_PT |
| oaire.citation.volume | 426 | pt_PT |
| person.familyName | Fernandes | |
| person.givenName | Tiago | |
| person.identifier.ciencia-id | 8810-5C8A-08D0 | |
| person.identifier.orcid | 0000-0002-3374-612X | |
| person.identifier.rid | B-6777-2013 | |
| person.identifier.scopus-author-id | 24449123500 | |
| rcaap.rights | openAccess | pt_PT |
| rcaap.type | article | pt_PT |
| relation.isAuthorOfPublication | fc21c4fc-108e-4b02-8413-5b06a96d97cc | |
| relation.isAuthorOfPublication.latestForDiscovery | fc21c4fc-108e-4b02-8413-5b06a96d97cc |