dc.creatorSaavedra Moncada, Alejandra
dc.creatorGarcia Einschlag, Fernando Sebastian
dc.creatorPrieto, Eduardo Daniel
dc.creatorRuiz, Gustavo Teodosio
dc.creatorLappin, Alexander G.
dc.creatorFerraudi, Guillermo J.
dc.creatorWolcan, Ezequiel
dc.date.accessioned2018-06-14T21:38:41Z
dc.date.available2018-06-14T21:38:41Z
dc.date.created2018-06-14T21:38:41Z
dc.date.issued2016-05
dc.identifierSaavedra Moncada, Alejandra; Garcia Einschlag, Fernando Sebastian; Prieto, Eduardo Daniel; Ruiz, Gustavo Teodosio; Lappin, Alexander G.; et al.; Photophysical properties of Re(I)(CO)3(phen) pendants grafted to a poly-4-vinylpyridine backbone: A correlation between photophysical properties and morphological changes of the backbone; Elsevier Science Sa; Journal of Photochemistry and Photobiology A: Chemistry; 321; 5-2016; 284-296
dc.identifier1010-6030
dc.identifierhttp://hdl.handle.net/11336/48733
dc.identifierCONICET Digital
dc.identifierCONICET
dc.description.abstractPhotochemical and photophysical properties of a polymer, Re-P4VP, consisting of single bondRe(I)(CO)3(phen) pendants grafted to a poly-4-vinylpyridine backbone, P4VP, were interpreted on the bases of morphological transformations. These transformations are responsible of a significant increase of the MLCTRe(I)→phen excited state luminescence lifetime when the polymer concentration is increased. Also a nearly 8-fold increase in the luminescence quantum yield resulted from the protonation of Re-P4VP with consequent changes of the excited state decay kinetics. Results of TEM and AFM morphological studies on P4VP and Re-P4VP in the presence of HClO4 acid, i.e., to form Re-P4VPHnn+, revealed that they have concentration dependent morphologies. From low to large concentrations of the Re-P4VP polymer, the morphology of Re-P4VP varies from a nonhomogeneous distribution of spherical nanoaggregates coexisting with micrometer size fibers to an homogeneous distribution of spherical nanoaggregates with diameters around 25 nm. The Re-P4VP morphology is also altered when the polymer pyridines are protonated. Protonation of diluted solutions of Re-P4VP polymers decrease the sizes of the nanoaggregates and small objects with diameters smaller than 10 nm appear.
dc.languageeng
dc.publisherElsevier Science Sa
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jphotochem.2016.01.001
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1010603015301799
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subject-Re(Co)3(Phen) Pendants
dc.subjectPhotophysics
dc.subjectPoly(4-Vinylpyridine)
dc.titlePhotophysical properties of Re(I)(CO)3(phen) pendants grafted to a poly-4-vinylpyridine backbone: A correlation between photophysical properties and morphological changes of the backbone
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


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