Polymerization effects and localized electronic states in condensed-phase eumelanin (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Polymerization effects and localized electronic states in condensed-phase eumelanin (Articolo in rivista) (literal)

Anno

• 2009-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1103/PhysRevB.80.174203 (literal)

Alternative label

• L. Sangaletti; P. Borghetti; P. Ghosh; S. Pagliara; P. Vilmercati; C. Castellarin-Cudia; L. Floreano; A. Cossaro; A. Verdini; R. Gebauer; A. Goldoni (2009)
  Polymerization effects and localized electronic states in condensed-phase eumelanin
  in Physical review. B, Condensed matter and materials physics
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• L. Sangaletti; P. Borghetti; P. Ghosh; S. Pagliara; P. Vilmercati; C. Castellarin-Cudia; L. Floreano; A. Cossaro; A. Verdini; R. Gebauer; A. Goldoni (literal)

Pagina inizio

• 174203 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 80 (literal)

Rivista

• Physical review. B, Condensed matter and materials physics (Rivista)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• L. Sangaletti; P. Borghetti; S. Pagliara: Univ Cattolica, Dipartimento Matemat & Fis, I-25121 Brescia, Italy L. Floreano; A. Cossaro; A. Verdini: CNR TASC, Trieste, Italy P. Ghosh; R. Gebauer: Abdus Salam Int Ctr Theoret Phys ICTP, Trieste, Italy P. Vilmercati; C. Castellarin-Cudia; A. Goldoni: Sincrotrone Trieste ScPA, Trieste, Italy R. Gebauer also INFM DEMOCRITOS Natl Simulat Ctr, Trieste, Italy (literal)

Titolo

• Polymerization effects and localized electronic states in condensed-phase eumelanin (literal)

Abstract

• The electronic structure of eumelanin thin films has been investigated by means of x-ray absorption and photoemission spectroscopies. The main features of the experimental data are interpreted on the basis of density-functional calculations for the isolated monomers participating to the eumelanin macromolecule. In order to single out the polymerization effects, we followed a bottom-up scaling approach to establish the minimum supramolecular level of organization that can provide a consistent spectroscopical picture of an altogether complex and highly disordered system. A tetramer macrocycle, made by three hydroquinones and one indolequinone, is found to reproduce the observed polymerization effects at the N K edge, while preserving the experimental spectral weight among the different monomers. This tetramer is different from that predicted for the synthesis from isolated monomers, providing an experimental evidence of the role of the reaction path on the stabilization of macrocycles in condensed-phase eumelanin. (literal)

Prodotto di

• MD.P06.016.001 Proprieta' elettroniche e strutturali di sistemi a bassa dimensionalita' (MD.P06.016.003) (Modulo)

Autore CNR

• RALPH GEBAUER (Persona)
• ALBANO COSSARO (Persona)
• LUCA FLOREANO (Persona)
• ALBERTO VERDINI (Unità di personale interno)

Incoming links:

Autore CNR di

• ALBANO COSSARO (Persona)
• LUCA FLOREANO (Persona)
• ALBERTO VERDINI (Unità di personale interno)
• RALPH GEBAUER (Persona)

Prodotto

• MD.P06.016.001 Proprieta' elettroniche e strutturali di sistemi a bassa dimensionalita' (MD.P06.016.003) (Modulo)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Physical review. B, Condensed matter and materials physics (Rivista)