Synthesis and hole-transporting properties of vinyl-type polynorbornenes with ethyl ester linked triarylamine side groups
| Autor: | Seunghyup Yoo, Myung Hwan Park, Jung Oh Huh, Youngkyu Do, Min Hyung Lee, Changhun Yun |
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| Rok vydání: | 2010 |
| Předmět: |
chemistry.chemical_classification
Conductive polymer Materials science Mechanical Engineering Metals and Alloys Polymer Condensed Matter Physics Photochemistry Electronic Optical and Magnetic Materials chemistry.chemical_compound Polyfluorene Monomer chemistry Polymerization Mechanics of Materials Polymer chemistry Materials Chemistry Addition polymer Glass transition Norbornene |
| Zdroj: | Synthetic Metals. 160:2000-2007 |
| ISSN: | 0379-6779 |
| DOI: | 10.1016/j.synthmet.2010.07.025 |
| Popis: | Palladium(II)-catalyzed polymerization of norbornene monomers bearing triarylamine side groups was investigated to prepare the vinyl-type polynorbornenes having hole-transporting properties. Norbornene monomers ( M1 – M3 ) with the ethyl ester linked aryldiphenylamines where the aryl group is phenyl, m -tolyl, and 1-naphthyl, respectively, were employed. The combined use of the Pd(II) catalyst supported by N-heterocyclic carbene ligand and AgSbF 6 leads to the production of soluble polynorbornenes ( P1 – P3 ). While the cyclic voltammetry measurements show the relatively low oxidational stability of polymers, the polymers exhibit the high glass transition temperature of 305–333 °C. The atomic force microscopy images of the thin film of P1 reveal the very smooth film surface with a roughness of 0.29 nm, indicating the good film-forming capability of polymer. When incorporated as a hole-transporting layer in Alq 3 -based electroluminescent devices, the spin-coated polymer films display hole-transporting property suitable for the proper green emission of Alq 3 . Among the devices studied, the one based on 1-naphthylamine-containing P3 exhibits the highest performance in terms of luminance and external quantum efficiency. |
| Databáze: | OpenAIRE |
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