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Lifetime and fluorescence quantum yield of two fluorescein-amino acid-based compounds in different organic solvents and gold colloidal suspensions

2018-09-01Artigo científico Acesso aberto
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dc.contributor.authorPilla, Viviane
dc.contributor.authorGonçalves, Augusto C.
dc.contributor.authorDos Santos, Alcindo A.
dc.contributor.authorLodeiro, Carlos
dc.contributor.institutionLAQV@REQUIMTE
dc.contributor.institutionDQ - Departamento de Química
dc.contributor.pblMDPI - Multidisciplinary Digital Publishing Institute
dc.date.accessioned2019-01-30T23:38:44Z
dc.date.available2019-01-30T23:38:44Z
dc.date.issued2018-09-01
dc.descriptionV.P. and A.C.G. thank Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)/Brazil for postdoctoral and Ph.D. Grants, respectively. C.L. thanks the CNPq program Science without borders 2014-2016 for the "Special Visitant Researcher" Grant (Brazil), CNPq and Fundacao de Amparo a Pesquisa do Estado de Minas Gerais (FAPEMIG). Financial support from the Scientific PROTEOMASS Association (Portugal), LAQV/REQUIMTE is acknowledged. All authors are also grateful for the financial and structural support provided by the University of Sao Paulo through the NAP-CatSinQ (Research Core in Catalysis and Chemical Synthesis), Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) and Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES). We thank Javier Fernandez-Lodeiro for synthesizing the gold nanoparticles used in this study.
dc.description.abstractFluorescein and its derivatives are yellowish-green emitting dyes with outstanding potential in advanced molecular probes for different applications. In this work, two fluorescent compounds containing fluorescein and an amino acid residue (compounds 1 and 2) were photophysically explored. Compounds 1 and 2 were previously synthesized via ester linkage between fluorescein ethyl ester and Boc-ser (TMS)-OH or Boc-cys(4-methyl benzyl)-OH. Studies on the time-resolved fluorescence lifetime and relative fluorescence quantum yield (ϕ) were performed for 1 and 2 diluted in acetonitrile, ethanol, dimethyl sulfoxide, and tetrahydrofuran solvents. The discussion considered the dielectric constants of the studied solvents (range between 7.5 and 47.2) and the photophysical parameters. The results of the lifetime and ϕ were compared with those obtained for compounds 1, 2 and fluorescein without an amino acid residue in alkaline aqueous solutions. Moreover, as a preliminary result compound 2 (S-cysteine) was tested in the presence of gold nanoparticles as an aggregation colorimetric probe.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent2709416
dc.identifier.doi10.3390/chemosensors6030026
dc.identifier.issn2227-9040
dc.identifier.otherPURE: 5967930
dc.identifier.otherPURE UUID: 6ecfaaf2-3dcf-4c66-b31f-350c37c6d549
dc.identifier.otherScopus: 85052618723
dc.identifier.otherWOS: 000448395400002
dc.identifier.otherORCID: /0000-0001-5582-5446/work/53556809
dc.identifier.urihttp://www.scopus.com/inward/record.url?scp=85052618723&partnerID=8YFLogxK
dc.identifier.urlhttps://www.scopus.com/pages/publications/85052618723
dc.language.isoeng
dc.peerreviewedyes
dc.subjectFluorescein
dc.subjectFluorescence quantum yield
dc.subjectGold nanoparticles
dc.subjectLifetime
dc.subjectPhysical and Theoretical Chemistry
dc.subjectAnalytical Chemistry
dc.titleLifetime and fluorescence quantum yield of two fluorescein-amino acid-based compounds in different organic solvents and gold colloidal suspensionsen
dc.typejournal article
degois.publication.issue3
degois.publication.titleChemosensors
degois.publication.volume6
dspace.entity.typePublication
rcaap.rightsopenAccess

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