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Influence of CB[n] complexation on the quenching of 2,4,6-triphenylpyrylium excited states by Fe2+ ions

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Influence of CB[n] complexation on the quenching of 2,4,6-triphenylpyrylium excited states by Fe2+ ions

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dc.contributor.author Montes Navajas, Pedro Manuel es_ES
dc.contributor.author García Gómez, Hermenegildo es_ES
dc.date.accessioned 2020-04-17T12:50:56Z
dc.date.available 2020-04-17T12:50:56Z
dc.date.issued 2013 es_ES
dc.identifier.issn 0021-9797 es_ES
dc.identifier.uri http://hdl.handle.net/10251/140935
dc.description.abstract [EN] This manuscript focuses on the influence that the addition of Fe2+ as electron donor quencher exerts on the photophysics of 2,4,6-triphenylpyrylium (TP+) depending on the formation or not of supramolecular inclusion complexes with cucurbit[n]uril (n: 7 or 8). 1H-NMR spectroscopy does not provide evidence supporting the formation of a ternary TP+@CB[n] Fe2+ complex. Emission quenching studies indicate that the prevalent deactivation mechanism for the quenching of TP+ emission by Fe2+ is by increasing the ionic strength of the solution, with no evidence for the occurrence of dynamic quenching. Laser flash photolysis indicates that while the triplet excited state of TP+ is instantaneously quenched by Fe2+ in the absence of CB[n], formation of the TP+@CB[n] inclusion complex protects TP+ triplet excited state from quenching, an effect that is more pronounced in the case of CB[8] due to the deeper penetration and more complete encapsulation of the heterocyclic pyrylium core inside the larger CB[8] capsule. es_ES
dc.description.sponsorship Financial support by the Spanish Ministry of Economy and Competitiviness (CTQ2012-31325) and Generalidad Valenciana (Prometeo 20127014) is gratefully acknowledged. P. Montes-Navajas also thanks the Universidad Politecnica de Valencia for a post-doctoral contract for excellence (CEI-01-11, 20090796). es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Journal of Colloid and Interface Science es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Supramolecular chemistry es_ES
dc.subject Cucurbiturils es_ES
dc.subject Photoinduced electron transfer es_ES
dc.subject Quenching es_ES
dc.subject Triphenylpyrylium es_ES
dc.subject.classification QUIMICA ORGANICA es_ES
dc.subject.classification QUIMICA ANALITICA es_ES
dc.title Influence of CB[n] complexation on the quenching of 2,4,6-triphenylpyrylium excited states by Fe2+ ions es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.jcis.2013.08.016 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/GVA//PROMETEO%2F2012%2F014/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/UPV//CE-01-11/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/UPV//20090796/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/MINECO//CTQ2012-32315/ES/REDUCCION FOTOCATALITICA DEL DIOXIDO DE CARBONO/ es_ES
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Química - Departament de Química es_ES
dc.description.bibliographicCitation Montes Navajas, PM.; García Gómez, H. (2013). Influence of CB[n] complexation on the quenching of 2,4,6-triphenylpyrylium excited states by Fe2+ ions. Journal of Colloid and Interface Science. 410:111-115. https://doi.org/10.1016/j.jcis.2013.08.016 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1016/j.jcis.2013.08.016 es_ES
dc.description.upvformatpinicio 111 es_ES
dc.description.upvformatpfin 115 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 410 es_ES
dc.relation.pasarela S\262431 es_ES
dc.contributor.funder Generalitat Valenciana es_ES
dc.contributor.funder Universitat Politècnica de València es_ES
dc.contributor.funder Ministerio de Economía y Competitividad es_ES


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