Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Synthesis and Characterization of New Orange-Red Light-Emitting PPV Derivatives With Bulky Cyclohexyl Groups

  • Published : 2002.09.20
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Abstract

A series of 2,5-dialkoxy substituted poly(1,4-phenylenevinylene) derivatives containing a rigid and bulky cyclohexyl group in the side chain, poly[2-(7-cyclohexylheptyloxy)-5-butoxy-1,4-phenylenevinylene] (PBCyHpPV), Poly[2-(6-cyclohexylmethoxyhexyloxy)-5-butoxy-1,4-phenylenevinylene] (PBCyHxPV), Poly[2,5-di-(6-cyclohexylmethoxy-hexyloxy)-1,4-phenylenevinylene] (PDCyHxPV) were synthesized via the Gilch polymerization. The synthesized polymers were soluble in common organic solvents and showed good thermal stability up to $370^{\circ}C$. The maximum absorption of PBCyHpPV, PBCyHxPV and PDCyHxPV as thin films was at 513 ㎚, 515 ㎚, 511 ㎚, respectively. Photoluminescence maximum emission of above polymers appeared at 590 ㎚, 597 ㎚, 590 ㎚, respectively. The electroluminescence (EL) maxima of the polymers appeared around 585-590 ㎚, and also showed another shoulder around 630 ㎚ strongly. PDCyHxPV showed the highest EL efficiency and EL power than those of other polymers due to the dilution effect of the two rigid and bulky cyclohexyl groups.

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References

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