dc.creator | Martín García, Iris | |
dc.creator | Díaz Reyes, Gloria | |
dc.creator | Sloan, George | |
dc.creator | Moglie, Yanina Fernanda | |
dc.creator | Alonso, Francisco | |
dc.date.accessioned | 2022-08-29T12:55:05Z | |
dc.date.accessioned | 2022-10-15T12:49:09Z | |
dc.date.available | 2022-08-29T12:55:05Z | |
dc.date.available | 2022-10-15T12:49:09Z | |
dc.date.created | 2022-08-29T12:55:05Z | |
dc.date.issued | 2021-05 | |
dc.identifier | Martín García, Iris; Díaz Reyes, Gloria; Sloan, George; Moglie, Yanina Fernanda; Alonso, Francisco; Sulfur-stabilised copper nanoparticles for the aerobic oxidation of amines to imines under ambient conditions; Royal Society of Chemistry; Journal of Materials Chemistry A; 9; 18; 5-2021; 11312-11322 | |
dc.identifier | 2050-7488 | |
dc.identifier | http://hdl.handle.net/11336/166792 | |
dc.identifier | 2050-7496 | |
dc.identifier | CONICET Digital | |
dc.identifier | CONICET | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4387935 | |
dc.description.abstract | The stabilisation of metal nanoparticles and control of their oxidation state are crucial factors in nanocatalysis. Elemental sulfur has been found to be a cheap and effective stabilising agent for copper nanoparticles in the form of copper(i) oxide. The Cu2ONPs/S8 system has been characterised by ICP-OES, EDX, XRD, XPS, FE-SEM, SEM, TEM and Cryo-EM. Astonishingly, in organic medium, the copper nanoparticles are organised as concentric rings within nanodroplets of sulfur of ca. 20-70 nm. In synthetic organic chemistry, imines can be directly obtained by the less studied and practiced oxidation of primary amines; however, the reaction conditions utilised are usually harsh and far from meeting the principles of Green Chemistry. Cu2ONPs/S8 has been successfully applied to the solvent-free aerobic oxidation of primary amines to imines under ambient conditions, using air as a terminal oxidant. The catalyst is effective in the homo- and heterocoupling of benzylic amines at very low copper loading (0.3 mol%), being catalytically superior to a range of commercial copper catalysts. A reaction mechanism has been proposed based on experimental evidence, which clarifies the major uncertainty regarding the key intermediate. The results of this study suggest a number of new avenues for research in nanocatalysis. | |
dc.language | eng | |
dc.publisher | Royal Society of Chemistry | |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1039/d0ta12621g | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://pubs.rsc.org/en/content/articlelanding/2021/TA/D0TA12621G | |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/restrictedAccess | |
dc.subject | COOPER NANOPARTICLES | |
dc.subject | SULFUR | |
dc.subject | AEROBIC OXIDATION | |
dc.subject | IMINES | |
dc.title | Sulfur-stabilised copper nanoparticles for the aerobic oxidation of amines to imines under ambient conditions | |
dc.type | info:eu-repo/semantics/article | |
dc.type | info:ar-repo/semantics/artículo | |
dc.type | info:eu-repo/semantics/publishedVersion | |