Artículos de revistas
Study Of Solvent-conjugated Polymer Interactions By Polarized Spectroscopy: Meh-ppv And Poly(9,9′-dioctylfluorene-2,7-diyl)
Registro en:
Journal Of Luminescence. , v. 130, n. 3, p. 415 - 423, 2010.
222313
10.1016/j.jlumin.2009.10.006
2-s2.0-72149110327
Autor
Cossiello R.F.
Susman M.D.
Aramendia P.F.
Atvars T.D.Z.
Institución
Resumen
Absorption, emission, and anisotropy measurements were performed on poly-[2-methoxy-5(2′-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) and poly-(9,9′-dioctylfluorene-2,7-diyl) (PF) solutions of various solvents, and in thin films deposited from them. The good correlation of MEH-PPV absorption and emission energy with Hildebrandt's dispersive parameter indicate that dispersive forces regulate the effective extent of the luminophore. The excitation and the emission spectra of α and β chains can be distinguished in PF solutions using the steady-state anisotropy. PF films show greater memory effect from the solutions from which they were spun than MEH-PPV. Anisotropy of MEH-PPV is very low, both in solutions and in films reflecting efficient energy migration. 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