Linear and circular dichroism in porphyrin J-aggregates probed by polarization modulated scanning near-field optical microscopy

Anno: 2014

Autori: Tantussi F., Fuso F., Allegrini M., Micali N., Occhiuto I.G., Scolaro L.M., Patane S.

Affiliazione autori: Univ Pisa, Dipartimento Fis Enrico Fermi, Sez Pisa, Ist Nazl Ott INO CNR, I-56127 Pisa, Italy; Univ Pisa, CNISM, Ist Nazl Ott INO CNR, Sez Pisa, I-56127 Pisa, Italy; Ist Proc Chim Fis IPCF CNR, I-98158 Messina, Italy; Univ Messina, CIRCMSB, Dipartimento Sci Chim, I-98166 Messina, Italy; Univ Messina, Dipartimento Fis & Sci Terra, I-98166 Messina, Italy.

Abstract: Polarization modulated scanning near-field optical microscopy (PM-SNOM) is effective in detecting circular and linear dichroism with sub-wavelength resolution. PM-SNOM investigation of the chiroptical properties of single ribbon-like nanosized J-aggregates formed by acid induced aggregation of tris-(4-sulfonatophenyl)phenylporphyrin is reported. Linear dichroism maps give evidence of well-organized chromophores packed in linear arrays within the structure of the nanoribbons. Circular dichroism maps indicate that the molecules forming the nanoribbon have an inherently chiral structure at the local scale.

Giornale/Rivista: NANOSCALE

Volume: 6 (18)      Da Pagina: 10874  A: 10878

Maggiori informazioni: This work was supported by PRIN 2010 (2010C4R8M8).
Parole chiavi: Resonance Light-scattering; Chiral-symmetry-breaking; Supramolecular Chirality; Thin-films; Memory; Template; Vortices; Emission; Fibers; Forces
DOI: 10.1039/c4nr00918e

Citazioni: 20
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18
Riferimenti tratti da Isi Web of Knowledge: (solo abbonati)
Link per visualizzare la scheda su IsiWeb: Clicca qui
Link per visualizzare la citazioni su IsiWeb: Clicca qui