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Sonochemically-Promoted Preparation of Silica-Anchored Cyclodextrin Derivatives for Effcient Copper Catalysis
dc.contributor.author | Martina, Katia | |
dc.contributor.author | Calsolaro, Federica | |
dc.contributor.author | Zuliani, Alessio | |
dc.contributor.author | Berlier, Gloria | |
dc.contributor.author | Chávez-Rivas, Fernando | |
dc.contributor.author | Moran, Maria Jesus | |
dc.contributor.author | Luque, Rafael | |
dc.contributor.author | Cravotto, Giancarlo | |
dc.date.accessioned | 2019-07-08T07:46:49Z | |
dc.date.available | 2019-07-08T07:46:49Z | |
dc.date.issued | 2019 | |
dc.identifier.uri | http://hdl.handle.net/10396/18819 | |
dc.description.abstract | Silica-supported metallic species have emerged as valuable green-chemistry catalysts because their high efficiency enables a wide range of applications, even at industrial scales. As a consequence, the preparation of these systems needs to be finely controlled in order to achieve the desired activity. The present work presents a detailed investigation of an ultrasound-promoted synthetic protocol for the grafting of β-cyclodextrin (β-CD) onto silica. Truly, ultrasound irradiation has emerged as a fast technique for promoting efficient derivatization of a silica surface with organic moieties at low temperature. Three different β-CD silica-grafted derivatives have been obtained, and the ability of β-CD to direct and bind Cu when CD is bonded to silica has been studied. A detailed characterization has been performed using TGA, phenolphthalein titration, FT-IR, diffuse reflectance (DR), DR UV-Vis, as well as the inductively-coupled plasma (ICP) of the β-CD silica-grafted systems and the relative Cu-supported catalysts. Spectroscopic characterization monitored the different steps of the reaction, highlighting qualitative differences in the properties of amino-derivatized precursors and final products. In order to ensure that the Cu-β-CD silica catalyst is efficient and robust, its applicability in Cu(II)-catalyzed alkyne azide reactions in the absence of a reducing agent has been explored. The presence of β-CD and an amino spacer has been shown to be crucial for the reactivity of Cu(II), when supported. | es_ES |
dc.format.mimetype | application/pdf | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | MDPI | es_ES |
dc.rights | https://creativecommons.org/licenses/by/4.0/ | es_ES |
dc.source | Molecules 24(13), 2490 (2019) | es_ES |
dc.subject | Sonochemistry | es_ES |
dc.subject | Copper-catalysis | es_ES |
dc.subject | β-cyclodextrin | es_ES |
dc.subject | Silica | es_ES |
dc.subject | Green chemistry | es_ES |
dc.subject | Organic-inorganic hybrid materials | es_ES |
dc.subject | Infrared spectroscopy | es_ES |
dc.subject | Diffuse reflectance | es_ES |
dc.subject | UV-visible | es_ES |
dc.title | Sonochemically-Promoted Preparation of Silica-Anchored Cyclodextrin Derivatives for Effcient Copper Catalysis | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.relation.publisherversion | http://dx.doi.org/10.3390/molecules24132490 | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/EC/H2020/721290 (COSMIC) | es_ES |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es_ES |