Synthesis and light-emitting properties of disubstituted polyacetylenes carrying chromophoric naphthylethynylphenyl pendants

The Journal of Physical Chemistry. B
Jacky W Y LamBen Zhong Tang

Abstract

Poly(1-phenyl-1-alkyne)s bearing chromophoric pendants and containing alkyl spacers (-{(C 6H 5)CC[(CH 2) m OCOC 6H 4CCNp]} n - [P 1( m) ( m = 3, 4, 9); Np = 1-naphthyl]) were synthesized, and the effects of structural variations on the optical properties, especially electroluminescence, of the polymers were investigated. The monomers were prepared in high yields by esterification and coupling reactions of n-phenyl-( n - 1)-alkyn-1-ols. Selective polymerizations of the 1-phenyl-1-alkyne unit of the monomers were effected by WCl 6-Ph 4Sn catalyst, affording polymers with high molecular weights ( M w up to 63 000) in high yields (up to 83%). Structures and properties of the polymers were characterized and evaluated by IR, NMR, TGA, UV, PL, and EL analyses. All the polymers are thermally very stable, losing almost no weight when heated up to 400 degrees C. Photoexcitation of the polymer solutions induces strong blue light emission at 460 nm, with quantum yields up to 98%. No aggregation quenching was observed when the polymers were fabricated into solid films. Multilayer EL devices with the configuration of ITO/P 1( m):PVK/BCP/Alq 3/LiF/Al were fabricated, which emitted blue light with luminance up to 498 cd/m (2). The device perfo...Continue Reading

References

Aug 16, 1996·Science·J R SheatsA Stocking
Jul 18, 2001·Journal of the American Chemical Society·S SetayeshG Leising
Sep 21, 2005·Accounts of Chemical Research·Jacky W Y Lam, Ben Zhong Tang
Jul 18, 2008·The Journal of Physical Chemistry. B·Anjun QinBen Zhong Tang
Mar 2, 1998·Angewandte Chemie·Arno KraftAndrew B Holmes
Jul 16, 2001·Angewandte Chemie·Alan G MacDiarmid

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Citations

Aug 15, 2009·Chemical Reviews·Jianzhao LiuBen Zhong Tang

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