Photoluminescence and electroluminescence of methoxy and carboethoxy derivatives of 1,3-diphenyl-1H-pyrazolo[3,4-b]quinoline
| Autor: | Ewa Gondek, Andrzej Danel, Sylwia Całus, Andriy V. Kityk |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Luminescence
Photoluminescence Chemistry Spectrum Analysis Quinoline Solvatochromism Doping Molecular Conformation Electroluminescence Photochemistry Atomic and Molecular Physics and Optics Analytical Chemistry chemistry.chemical_compound Electron transfer Electricity Excited state Quinolines Solvents OLED Pyrazoles Instrumentation Spectroscopy |
| Zdroj: | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 69:22-26 |
| ISSN: | 1386-1425 |
| DOI: | 10.1016/j.saa.2007.03.003 |
| Popis: | A series of methoxy (MO) and carboethoxy (CE) derivatives of 1,3-diphenyl-1H-pyrazolo[3,4-b]quinoline ([DPPQ]) are characterized by spectroscopic methods. All dyes show the photoluminescent spectra which are highly solvatochromic. In the case of 6MO[DPPQ] and 6CE[DPPQ] the emission bands are broad and shifted to the red with increasing of solvent polarity whereas the dyes 6MO1pMO[DPPQ] and 6MO13pMO[DPPQ] exhibit a reverse solvatochromism. The large difference between the excited- and state-dipole moments indicates a strong electron transfer effects in all dyes. The EL spectra are obtained for the fabricated OLEDs with a general structure of EL device ITO/PVK:6X[DPPQ]/Ca/Al. The blue emission originating from PVK host matrix appears to be quenched in EL spectra of doped PVK matrix giving rise to emission in blue, blue-green or green spectral regions. The obtained results demonstrate that a series of newly synthesized methoxy and carboethoxy [DPPQ]-derivatives may be considered as promising materials for electroluminescent applications. |
| Databáze: | OpenAIRE |
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