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Linear relationship between emission quantum yield and Stokes shift in 3-styryl aza-coumarin based dyes in the presence of cyclodextrins

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dc.contributor.authorAlcázar, Jackson
dc.contributor.authorGarcía-Río, Luis
dc.contributor.authorRobles, Agustín I.
dc.contributor.authorDinamarca-Villarroel, Luis
dc.contributor.authorFierro, Angélica
dc.contributor.authorSantos, José G.
dc.contributor.authorAliaga, Margarita E.
dc.date.accessioned2023-04-26T19:47:33Z
dc.date.available2023-04-26T19:47:33Z
dc.date.issued2023
dc.description.abstractThe effect of the cyclodextrins inclusion on the Stokes shifts and emission quantum yield of three 3-styryl aza-coumarin dyes (SACs) was experimentally and theoretically studied. Preliminary results show a relationship between the emission quantum yield and the calculated binding constants. Supramolecular inclusion was supported by changes in the fluorescence spectra, high-resolution mass spectrometry and molecular dynamics studies. 2,6-di-O-methyl-b-cyclodextrin (DM-b-CD) presented higher binding constants than b-cyclodextrin (b-CD), along with up to a 6-fold increase in emission quantum yield for the SACs. Additionally, a linear negative correlation was obtained between the Stokes shift and the emission quantum yield. This linear and empirical relationship was explained by the action of a unique intramolecular rotation and charge transfer phenomenon in the dyes, which was modulated by cyclodextrins, and supported by calculations based on density functional theory.
dc.description.versionVersión publicada
dc.format.extent9 p.
dc.identifier.citationJackson J. Alcázar, Luis García-Río, Agustín I. Robles, Luis Dinamarca-Villarroel, Angélica Fierro, José G. Santos, Margarita E. Aliaga, Linear relationship between emission quantum yield and Stokes shift in 3-styryl aza-coumarin based dyes in the presence of cyclodextrins, Journal of Molecular Liquids, Volume 381, 2023, 121790, ISSN 0167-7322, https://doi.org/10.1016/j.molliq.2023.121790.
dc.identifier.urihttps://repositorio.udd.cl/handle/11447/7408
dc.language.isoen
dc.subjectAza-Coumarin dyes
dc.subjectIntramolecular rotation
dc.subjectIntramolecular charge transfer
dc.subjectCyclodextrin inclusion
dc.subjectEmission quantum yield
dc.subjectStokes shift
dc.subjectSupramolecular chemistry
dc.titleLinear relationship between emission quantum yield and Stokes shift in 3-styryl aza-coumarin based dyes in the presence of cyclodextrins
dc.typeArticle
dcterms.accessRightsAcceso abierto
dcterms.sourceJournal of Molecular Liquids
dspace.entity.typePublication

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