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Type: Artigo de periódico
Title: Probing Interchain Interactions In Emissive Blends Of Poly[2-methoxy-5- (2′-ethylhexyloxy)-p-phenylenevinylene] With Polystyrene And Poly(styrene-co-2-ethylhexyl Acrylate) By Fluorescence Spectroscopy
Author: De Andrade M.L.
Atvars T.D.Z.
Abstract: We present dynamic and static photoluminescence studies on polymer blends of conjugated poly[2-methoxy-5-(2′-ethylhexyloxy)-p-phenylenevinylene] (MEH-PPV) with polystyrene-co-1-pyrenyl methyl methacrylate and its copolymer poly(styrene-co-2-ethylhexyl acrylate-co-1-pyrenylmethyl methacrylate) (with 9 mol% and 19 mol% of 2-ethylhexyl acrylate units and 0.06 mol% of 1-pyrenyl). Pyrenyl-labeled polystyrene and its copolymers were synthesized by emulsion polymerization and characterized by 13C and 1H-NMR, FTIR, GPC, DSC, and UV-Vis. Spin-coating films of the blends were prepared from chloroform solutions with 0.1, 0.5, 1.0, and 5.0 wt% of MEH-PPV. The miscibility of these systems was studied by non-radiative energy transfer processes between the 1-pyrenyl moieties (the energy donor) and MEH-PPV (the energy acceptor). The relative emission intensities and the fluorescence lifetimes of the donor showed that the miscibility of MEH-PPV and the copolymers is greater than that of MEH-PPV and polystyrene and this was confirmed by epifluorescence optical microscopy and scanning electron microscopy. ©2006 Sociedade Brasileira de Química.
Rights: aberto
Identifier DOI: 
Date Issue: 2006
Appears in Collections:Unicamp - Artigos e Outros Documentos

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