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dc.contributor.author
Wolcan, Ezequiel  
dc.date.available
2021-09-22T13:35:44Z  
dc.date.issued
2020-03  
dc.identifier.citation
Wolcan, Ezequiel; Morphology-dependent photophysical properties of Poly-4-vinylpyridine polymers containing –Re(CO)3 (N^N)+ pendants; Centro de Estudios sobre Ciencia, Desarrollo y Educación Superior; Science Reviews - from the end of the world; 1; 2; 3-2020; 66-91  
dc.identifier.issn
2683-9288  
dc.identifier.uri
http://hdl.handle.net/11336/141125  
dc.description.abstract
We review the morphological and the photophysical properties of several inorganic polymers that can be prepared from poly-4- vinylpyridine (P4VP). These polymers contain –Re(CO)3 (N^ N)+ pendants attached to their backbone with α-diimine ligands (N^ N) such as 2,2´-bipyridine (bpy), 1,10-phenanthroline (phen), 3,4,7,8-tetramethyl-1,10-phenanthroline (tmphen) and 5-nitro-1,10- phenanthroline (NO2 -phen). These Re(I) polymers, show marked differences in their photophysical properties when compared to single [pyRe(CO)3 (N^ N)]+ molecules in diluted solutions. For example, Re→phen charge transfer excited states (MLCT) in the Re(I) polymers undergo a more efficient annihilation and/or secondary photolysis than in [pyRe(CO)3 phen]+ complexes. Depending on solvent and/or cast film conditions, several aggregates of polymer strands with different morphologies were observed by transmission electron microscopy (TEM) and dynamic light scattering (DLS) techniques. Morphological changes derived from media-imposed changes (solvent, temperature) or from polymer backbone chemical modifications (protonation or peralkylation in P4VP uncoordinated pyridines) are responsible for the marked differences observed between the photophysical properties of these Re(I) polymers and those of the single pyRe(CO)3 (N^ N)+ molecules. Therefore, these Re(I) polymers can provide a good reaction scenario for other photochemical reactions. Thus, resonance energy transfer between –Re(CO)3 (tmphen)+ and –Re(CO)3 (NO2 -phen)+ pendants was observed in Re(I)-P4VP polymers containing both chromophores attached to their backbone. In addition, in the quenching of the MLCT luminescence of –Re(CO)3 (N^ N)+ pendants by amines, we observed a retardation of the molecular motion due to the restricted media that favored the observation of the Marcus inverted effect in bimolecular reactions due to the fact that low values of the solvent reorganization energies are achieved within aggregates.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Centro de Estudios sobre Ciencia, Desarrollo y Educación Superior  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Poly-4-vinylpyridine polymers  
dc.subject
Marcus inverted effect  
dc.subject
Re(CO)3(N^N)+ pendants  
dc.subject.classification
Físico-Química, Ciencia de los Polímeros, Electroquímica  
dc.subject.classification
Ciencias Químicas  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.title
Morphology-dependent photophysical properties of Poly-4-vinylpyridine polymers containing –Re(CO)3 (N^N)+ pendants  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2021-09-06T17:23:00Z  
dc.journal.volume
1  
dc.journal.number
2  
dc.journal.pagination
66-91  
dc.journal.pais
Argentina  
dc.journal.ciudad
Buenos Aires  
dc.description.fil
Fil: Wolcan, Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina  
dc.journal.title
Science Reviews - from the end of the world  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.52712/sciencereviews.v1i2.9  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://scirevfew.net/index.php/sciencereviews/article/view/9