A series of new luminescent non-planar 1,8-naphthyridine derivatives giving coloured and close-to-white electroluminescence spectra
| Autor: | Giedrius Juška, Kęstutis Arlauskas, Ernesta Bužavaitė, Indrė Urbanavičiūtė, Bronė Lenkevičiūtė, Albinas Žilinskas, Justina Dirsytė, Sigita Višniakova |
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| Rok vydání: | 2017 |
| Předmět: |
Photoluminescence
Bicyclic molecule Chemistry Biophysics 02 engineering and technology General Chemistry Electroluminescence 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Photochemistry 01 natural sciences Biochemistry Atomic and Molecular Physics and Optics Spectral line 0104 chemical sciences chemistry.chemical_compound Crystallography OLED 0210 nano-technology Luminescence HOMO/LUMO Octane |
| Zdroj: | Journal of Luminescence. 181:299-309 |
| ISSN: | 0022-2313 |
| Popis: | We report a synthesis of 37 new 1,8-naphthyridine based compounds having a non-planar bicyclic moiety (bicyclo[3.3.1]nonane, bicyclo[3.3.0]octane and camphor). We measured energetic characteristics (EHOMO=[−5.9; −5.4] eV, ELUMO=[−3.4; −2.4] eV and Eg_opt=[2.3; 3] eV), tested photoluminescence (PL) properties in chloroform solution (PL peaks at 390–490 nm range; QY reaching 53%) and produced multilayer OLED structures with our new materials as an emissive layer (EML). With changing the EML material, we observed electroluminescence (EL) covering a wide colour spectrum: red-orange, yellow, lettuce-green, green, blue-green (compared to violet from a control device). A broad white EL spectrum was registered for OLEDs with duplex non-planar “V” conformation molecules as an EML. The analysis of the results let us obtain precious information about the influence of molecular structure peculiarities on PL and EL spectra, as well as on values of the HOMO, the LUMO and Eg_opt, that are universal for all molecular systems. |
| Databáze: | OpenAIRE |
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