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Tantalum vs Niobium MCF nanocatalysts in the green synthesis of chromene derivatives

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dc.contributor.authorSmuszkiewicz, Agata
dc.contributor.authorLópez Sanz, Jesús
dc.contributor.authorSobczakb, Izabela
dc.contributor.authorZiolek, María
dc.contributor.authorMartín Aranda, Rosa María
dc.contributor.authorPérez Mayoral, María Elena
dc.date.accessioned2024-05-20T11:57:55Z
dc.date.available2024-05-20T11:57:55Z
dc.date.issued2019-03-15
dc.description.abstractTaMCF silicas modified with alkaline metals can be considered a novel family of highly efficient bifunctional catalysts involved in the synthesis of chromene derivatives, from salicylaldehyde 2 and acetonitrile compounds, under mild conditions, showing enhanced catalytic performance than their NbMCF analogues. The observed reactivity was mainly attributed to the higher basicity of the Me/TaMCF but also the texture of the samples. The Me/TaMCF silicas showed higher Brønsted basicity than the Nb ones as indicated by the stronger interaction between alkali metals and Ta in the UV–vis and the test reaction experiments. On the other hand, the basicity of Me/TaMCF together the reactivity degree and steric hindrance of the starting acetonitriles are key factors influencing the reaction selectivity. In conclusion, the basicity of the samples plays an important role initiating the reaction by activation of nucleophile but also a compromise between alkaline cation size and basicity is required.en
dc.description.versionversión publicada
dc.identifier.doihttp://doi.org/10.1016/j.cattod.2018.06.038
dc.identifier.issn1873-4308
dc.identifier.urihttps://hdl.handle.net/20.500.14468/12764
dc.journal.titleCatalysis Today
dc.journal.volume325
dc.language.isoen
dc.publisherElsevier
dc.relation.centerFacultad de Ciencias
dc.relation.departmentQuímica Inorgánica y Química Técnica
dc.rightsinfo:eu-repo/semantics/embargoedAccess
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.subject.keywordsNb and Ta mesoporous silicas
dc.subject.keywordsHeterogeneous catalysis
dc.subject.keywordsMulticomponent reactions
dc.subject.keywordsChromene derivatives
dc.titleTantalum vs Niobium MCF nanocatalysts in the green synthesis of chromene derivativeses
dc.typejournal articleen
dc.typeartículoes
dspace.entity.typePublication
relation.isAuthorOfPublicationbafbca28-7ba9-4a29-b350-ebdcbc2381bb
relation.isAuthorOfPublicationa0e31477-6806-4f00-afdc-90c4136f232e
relation.isAuthorOfPublication.latestForDiscoverybafbca28-7ba9-4a29-b350-ebdcbc2381bb
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