dc.creator | Saavedra Moncada, Alejandra | |
dc.creator | Garcia Einschlag, Fernando Sebastian | |
dc.creator | Prieto, Eduardo Daniel | |
dc.creator | Ruiz, Gustavo Teodosio | |
dc.creator | Lappin, Alexander G. | |
dc.creator | Ferraudi, Guillermo J. | |
dc.creator | Wolcan, Ezequiel | |
dc.date.accessioned | 2018-06-14T21:38:41Z | |
dc.date.available | 2018-06-14T21:38:41Z | |
dc.date.created | 2018-06-14T21:38:41Z | |
dc.date.issued | 2016-05 | |
dc.identifier | Saavedra 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.identifier | 1010-6030 | |
dc.identifier | http://hdl.handle.net/11336/48733 | |
dc.identifier | CONICET Digital | |
dc.identifier | CONICET | |
dc.description.abstract | Photochemical 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.language | eng | |
dc.publisher | Elsevier Science Sa | |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jphotochem.2016.01.001 | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1010603015301799 | |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/restrictedAccess | |
dc.subject | -Re(Co)3(Phen) Pendants | |
dc.subject | Photophysics | |
dc.subject | Poly(4-Vinylpyridine) | |
dc.title | 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 | |
dc.type | info:eu-repo/semantics/article | |
dc.type | info:ar-repo/semantics/artículo | |
dc.type | info:eu-repo/semantics/publishedVersion | |