Lim, Soon Kit Julian and Rahamathullah, Rafizah and Sarih, Norazilawati Muhamad and Khairul, Wan Mohd (2018) Tailoring tail-free nematogen of ethynylated-schiff base and its evaluation as solution-processable OLED emitting material. Journal of Luminescence, 201. pp. 397-401. ISSN 0022-2313, DOI https://doi.org/10.1016/j.jlumin.2018.05.025.
Full text not available from this repository.Abstract
A new rigid core dye comprised ESB-NO2 of chromophore moieties of acetylide (C≡C), Schiff base (C˭N) and nitro (NO2) was successfully synthesized to demonstrate tail-free nematogen as emitting material for organic light-emitting diode (OLED). The relationship between liquid crystal molecular structure, phase transition temperature and electroluminescence behaviour were evaluated. The mesomorphic properties of ESB-NO2 were identified via polarized optic microscopy (POM) which displayed nematic phase of Schlieren textures and their corresponding transition enthalpies were respectively recorded at 25.15 kJ mol−1. The photoluminescence behaviours of ESB-NO2 have been verified at λem,max = 538 nm where this emission are for its π→π * transition, intramolecular charge transfer (ICT) absorptions and fluoresce characters. Having ESB-NO2 as liquid crystalline material, OLED was constructed featuring single-layer indium tin oxide (ITO) coated substrate/ESB-NO2/Au via solution-casting method. The result revealed the single layer ESB-NO2 film displayed satisfactory electroluminescence with intense yellow emission under different direct current (DC) voltages supply. These findings indicate the practicability of designing tail-free nematogenic compounds as promising solution-processed OLED materials.
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Higher Education (MOHE) for research grant ( FRGS59366 ) |
| Uncontrolled Keywords: | Acetylide; Schiff base; Chromophore; Liquid crystals; OLEDs |
| Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry |
| Divisions: | Faculty of Science > Department of Chemistry |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 31 May 2019 02:35 |
| Last Modified: | 31 May 2019 02:35 |
| URI: | http://eprints.um.edu.my/id/eprint/21434 |
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