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Conjugated and Nonconjugated Poly p-Phenylene Vinylene Block Copolymers

2 Conjugated and Nonconjugated Poly(p-Phenylene Vinylene) Block Copolymers [Pg.92]

Conjugated segment with trans double bonds [Pg.93]

FIGURE 2.6 The schematic structure of rigid and flexible block PPV containing saturated (unconverted) units and m-vinylene links. (From Son, S., Dodabalapur, A., Lovinger, A. J., and Galvin, M.E., Science, 269, 376, 1995. With permission.) [Pg.93]

Electron acceptor dicyanovinyl and oxadiazole substituents have been recently introduced into phenylene units of the PPV block copolymers (179,180) [211]. Blue and blue-greenish PL emission was observed for 179 and 180, respectively, but the PLQY was relatively low even in solution (13 and 24%) and no EL device has yet been reported. [Pg.95]

Lahti and coworkers [212] reported a series of meta-linked oligo(phenylene vinylene) block copolymers 181a-c. A mem-linked phenylene unit imposed an additional hypsochromic shift on the emission of these segmented polymers. The PL maxima were found at 399-416 nm, but a significant (ca. 70 nm) red shift was observed for EL spectra (ITO/polymer/Ca/Al) (Chart 2.39). [Pg.95]




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Conjugated block copolymers

Conjugated poly

Conjugated poly block

Conjugation poly

Copolymers conjugated

P- conjugates

P-Phenylene vinylene

P-phenylene

PS block

PS-poly

Poly -p-phenylene vinylene

Poly block

Poly block copolymers

Poly blocking

Poly conjugates

Poly(p-phenylene vinylene) Block Copolymers

Poly(phenylenes)

Poly-phenylene vinylene

Poly[p- phenylene

Poly[p- phenylenes

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