Poly(2,3-diphenylphenylene vinylene) derivatives having liquid crystalline side groups

A. K. Li, Sheng-Hsiung Yang, W. Y. Jean, Chain-Shu Hsu*, B. R. Hsieh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


Poly(2,3-diphenylphenylene vinylene) (DP-PPV) derivatives with pendant mesogene groups were synthesized. A biphenyoxyl or cyclohexylphenoxy moiety serves as the rigid mesogen core, a methylene chain as the spacer, and a alkyl or alkoxy group as the flexible terminal group. The optical properties of the polymers were investigated by UV-vis and photoluminescent spectroscopies. The polymer films emitted green-blue photoluminescence and electroluminescence. The phase transition behaviors of the polymers were characterized by a polarized optical microscope and a differential scanning calorimeter. The monomers did not show mesophases, while the polymers exhibited a nematic phase around 170-190 °C. The aligned films exhibited dichroism in absorption and emission spectra, implying that the polymers have potential for linearly polarized LED application.

Original languageEnglish
Pages (from-to)2741-2744
Number of pages4
JournalChemistry of Materials
Issue number9
StatePublished - 21 Oct 2000

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