Poly(4-diphenylaminostyrene) with a well-defined polymer chain structure: Controllable optical and electrical properties
✍ Scribed by Itaru Natori; Shizue Natori; Hiroyuki Sekikawa; Tomoyuki Takahashi; Kenji Ogino; Kousuke Tsuchiya; Hisaya Sato
- Book ID
- 104088195
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 705 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0032-3861
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✦ Synopsis
The effect of polymer chain structure on the optical and electrical properties are reported for poly(4diphenylaminostyrene) (PDAS), which was prepared by the living anionic polymerization of 4-diphenylaminostyrene (DAS) with the benzyllithium (BzLi)/N,N,N 0 ,N 0 -tetramethylethylenediamine (TMEDA) system. The optical properties of PDAS are strongly affected by the stereoregularity of the PDAS polymer chain; intramolecular excimer-forming fluorescence was observed from PDAS with a syndiotactic-rich configuration. The highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels of PDAS were approximately À5.4 and À2.0 eV, respectively, regardless of the polymer chain structure. The hole and electron drift mobilities for PDAS were in the order of 10 À4 to 10 À5 (cm 2 /V s) and 10 À5 (cm 2 /V s), respectively, with negative slopes. The distance of each triphenylamino (TPA) group in the polymer chain was a major factor influencing the drift mobility of PDAS. The current-voltage (I-V) characteristics of PDAS were controllable according to the polymer chain structure of PDAS.