Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
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Synthesis and Characterization of a New PPV Derivative Containing a Sterically Hindered 2,5-Dimethylphenyl Group

  • Kim, Yun-Hi (Department of Polymer Science & Engineering and Engineering Research Institute, Gyeongsang National University) ;
  • Lee, Hyun-Ouk (Department of Polymer Science & Engineering and Engineering Research Institute, Gyeongsang National University) ;
  • Lee, Ki-Suk (Department of Polymer Science & Engineering and Engineering Research Institute, Gyeongsang National University) ;
  • Kwon, Soon-Ki (Department of Polymer Science & Engineering and Engineering Research Institute, Gyeongsang National University)
  • Published : 2003.12.01
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Abstract

A new poly[2-(2',5'-dimethylphenyl)-1,4-phenylenevinylene] (PDMPPV) that features a bulky 2',5'-dimethylphenyl substituent, which can induce steric hindrance between the PPV backbone and the methyl groups, was designed and synthesized. The polymer structure having no TBB defects was confirmed by $^1$H-NMR and $\^$13/CNMR spectroscopy. The polymer showed good thermal stability with high T$\_$g/. The polymer film showed a maximum absorption at 415 nm with an absorption onset at 480 nm. The maximum emission peak showed at ca. 515 nm, with a shoulder at 530 nm. The turn-on voltages of ITO/PEDOT/PDMPPV/Al and ITO/PDMPPV/Al devices were 8 and 10 V, respectively. The electroluminescence spectrum from the device showed a maximum peak at 510 nm with a shoulder at ca. 535 nm.

Keywords

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