Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/93142
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dc.contributor.authorPinheiro, Daniela-
dc.contributor.authorPineiro, Marta-
dc.contributor.authorGalvão, Adelino M.-
dc.contributor.authorMelo, J. Sérgio Seixas de-
dc.date.accessioned2021-02-16T16:33:32Z-
dc.date.available2021-02-16T16:33:32Z-
dc.date.issued2021-
dc.identifier.issn2041-6520pt
dc.identifier.issn2041-6539pt
dc.identifier.urihttp://hdl.handle.net/10316/93142-
dc.description.abstractUsing green chemistry procedures the synthesis of N-alkyl (NCnInd) and N,N′-dialkyl (N,N′CnInd) indigo derivatives, with n = 1–3, 6, 8, 12 and 18, was undertaken, leading to compounds with blueish to greenish colors in solution. The effect of the alkyl chain length on the spectral (including color) and photophysical properties of the compounds was explored. This was done with solvents of different viscosities and polarities (dielectric constants). From time-resolved fluorescence and femtosecond-transient absorption (fs-TA) for the NCnInd derivatives with n = 1 and 2, the decays are, in methylcyclohexane (MCH) and n-dodecane, single-exponential, while in 2-methyltetrahydrofuran (2MeTHF) they are bi-exponential. The excited state proton transfer (ESPT) is ultrafast (<1 ps) for NC1,2Ind in MCH and n-dodecane, supported by time-dependent density functional theory (TDDFT) calculations, thus showing that both the chain length and solvent influence the ESPT process. For N,N′CnInd, from time-resolved experiments, and with the exception of the shortest member of the series, N,N′C1Ind, two conformers are found to be present in the excited state.pt
dc.language.isoengpt
dc.relation02/SAICT/2017pt
dc.relationPTDC/QUI-QFI/31625/2017pt
dc.relationinfo:eu-repo/grantAgreement/POCI-01-0145-FEDER-016387/SunStorage - Harvesting and storage of solar energypt
dc.relationUIDB/00313/2020pt
dc.relationUIDP/00313/2020pt
dc.relationUID/QUI/00100/2019pt
dc.relationSFRH/BD/74351/2010SFRH/BD/74351/2010pt
dc.rightsopenAccesspt
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/pt
dc.titleDeep in blue with green chemistry: influence of solvent and chain length on the behaviour of N- and N,N′- alkyl indigo derivativespt
dc.typearticle-
degois.publication.firstPage303pt
degois.publication.lastPage313pt
degois.publication.issue1pt
degois.publication.titleChemical Sciencept
dc.relation.publisherversionhttps://pubs.rsc.org/en/Content/ArticleLanding/SC/2021/D0SC04958pt
dc.peerreviewedyespt
dc.identifier.doi10.1039/D0SC04958Apt
degois.publication.volume12pt
dc.date.embargo2021-01-01*
uc.date.periodoEmbargo0pt
item.grantfulltextopen-
item.languageiso639-1en-
item.fulltextCom Texto completo-
crisitem.author.deptFaculty of Sciences and Technology-
crisitem.author.deptFaculty of Sciences and Technology-
crisitem.author.deptFaculty of Sciences and Technology-
crisitem.author.parentdeptUniversity of Coimbra-
crisitem.author.parentdeptUniversity of Coimbra-
crisitem.author.parentdeptUniversity of Coimbra-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.orcid0000-0001-5897-6020-
crisitem.author.orcid0000-0002-7460-3758-
crisitem.author.orcid0000-0001-9708-5079-
Appears in Collections:I&D CQC - Artigos em Revistas Internacionais
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