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Covalent and noncovalent hybrids of di-amino porphyrin functionalized graphene oxide and their interaction with gold nanoparticles

2022Journal article Open access
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dc.contributor.authorAndrade, Suzana M.
dc.contributor.authorVaz Serra, Vanda
dc.contributor.authorBueno-Alejo, Carlos J.
dc.contributor.authorGarcia, Ana
dc.contributor.authorCarvalho, M. Fernanda N.N.
dc.contributor.authorIlharco, Laura M.
dc.contributor.authorNeves, Maria Graça P.M.S.
dc.contributor.authorCosta, Sílvia M.B.
dc.date.accessioned2022-12-07T16:49:15Z
dc.date.available2022-12-07T16:49:15Z
dc.date.issued2022
dc.description.abstractPorphyrin functionalization of graphene oxide (GO) influenced the plasmonic effect of gold nanoparticles (AuNP). The former was achieved by modification of GO with 5,10-bis(4-aminophenyl)-15,20-diphenylpor-phyrin, P(NH2)2,adj, by noncovalent interactions as well as by covalent association, following standard chemis-try. The success of the chemical functionalization of GO with P(NH2)2,adj, was confirmed by FTIR. Steady-state and time-resolved fluorescence showed a strong fluorescence quenching of porphyrin in the presence of GO, indicative of a photoinduced electron transfer process from porphyrin units to GO, which acts as an electron acceptor. The surface plasmon coupling effect promoted by the AuNP@GO hybrids, proved to be effective only in the case of the noncovalent hybrid, detected through the decrease of the porphyrin fluorescence lifetime and increase in the emission intensity in solution, in good agreement with FLIM results on deposited samples.pt_PT
dc.description.sponsorshipPest-OE/QUI/UI0100/2013/2014; projects REEQ/115/QUI/2005
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.jlumin.2022.119097pt_PT
dc.identifier.issn0022-2313
dc.identifier.urihttp://hdl.handle.net/10400.1/18603
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationAnchoring of metal nanoparticles on graphene hybrid assemblies with photoactive molecules
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectPhoto functiona lmaterialspt_PT
dc.subjectGraphenept_PT
dc.subjectMetal-enhanced fluorescencept_PT
dc.subjectPhoto induced electron transferpt_PT
dc.subjectConfocal fluorescence lifetime microscopypt_PT
dc.titleCovalent and noncovalent hybrids of di-amino porphyrin functionalized graphene oxide and their interaction with gold nanoparticlespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleAnchoring of metal nanoparticles on graphene hybrid assemblies with photoactive molecules
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FQUI-QUI%2F117498%2F2010/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FQUI-COL%2F29379%2F2017/PT
oaire.citation.startPage119097pt_PT
oaire.citation.titleJournal of Luminescencept_PT
oaire.citation.volume250pt_PT
oaire.fundingStream3599-PPCDT
oaire.fundingStream3599-PPCDT
person.familyNameGarcia
person.givenNameAna
person.identifier.ciencia-idB214-EA2D-350A
person.identifier.orcid0000-0001-6289-4554
person.identifier.scopus-author-id7404608764
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicatione49828e5-432e-46e3-a7fc-2fdbf51a237b
relation.isAuthorOfPublication.latestForDiscoverye49828e5-432e-46e3-a7fc-2fdbf51a237b
relation.isProjectOfPublication4e363dec-cc51-41f4-92ee-03961d97beeb
relation.isProjectOfPublicationfe991c1c-2552-4307-82c0-abf8ab50b899
relation.isProjectOfPublication.latestForDiscoveryfe991c1c-2552-4307-82c0-abf8ab50b899

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