Synthesis and characterization of highly hindered and thermally stable poly(1,4‐spirobifluorenylenevinylene) derivative |
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Authors: | Yun‐Hi Kim Jong‐Won Park Dong‐Cheol Shin Hong You Soon‐Ki Kwon |
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Institution: | 1. Department of Chemistry, Gyeongsang National University, Chinju 660‐701, Korea;2. School of Nano‐Advanced Materials and Engineering Research Institute, Gyeongsang National University, Chinju 660–701 Korea;3. SK Corp, Taejon 305‐712, Korea;4. School of Nano‐Advanced Materials and Engineering Research Institute, Gyeongsang National University, Chinju 660–701 KoreaSchool of Nano‐Advanced Materials and Engineering Research Institute, Gyeongsang National University, Chinju 660–701 Korea |
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Abstract: | A new poly(1,4‐spirobifluorenylenevinylene) having advantage PPV and spirobifluorene as new emissive family was synthesized. Compared with PPV derivatives that usually have a tolane bisbenzyl defect, the polymer has the defect free structure because of the steric hindrance of the asymmetric bulky spirobifluorenyl group. Compared with spirobifluorene derivatives that usually have a low solubility, the polymer has the good solubility in common organic solvents. The polymer was amorphous and showed high PL quantum efficiency and high thermal stability with high Tg. The PL emission peaks were shown at 480–490 nm in solution and film, respectively, which may represent the bluest emission peak reported for fully conjugated PPV derivatives. The study of thermal annealing of PL spectrum showed excimer formation inhibited. The thermal and optoelectronic properties of the polymer imply that it is a promising material for the PLED application. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 900–907, 2007. |
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Keywords: | fluorescence high PL quantum efficiency inhibited excimer emission light‐emitting diodes (LED) luminescence spirobifluorenylenevinylene |
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