Blue and green emission bands in the enantiopure (S)-(-)-1-[(1-phenyl)-N-(biphen-2-yl)methylidene]ethylamine: Morphological, structural and optical properties
| Autor: | O. Portillo-Moreno, J. Ramírez-Márquez, G.E. Moreno-Morales, M.A. Mora-Ramírez, Efraín Rubio-Rosas, G. Hernández-Téllez, René Gutiérrez-Pérez, R. Palomino-Merino |
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| Rok vydání: | 2019 |
| Předmět: |
Biphenyl
Photoluminescence Materials science Band gap 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 010309 optics symbols.namesake chemistry.chemical_compound Crystallography chemistry Molecular vibration 0103 physical sciences symbols Orthorhombic crystal system Direct and indirect band gaps Electrical and Electronic Engineering Ethylamine 0210 nano-technology Raman spectroscopy |
| Zdroj: | Optik. 185:331-338 |
| ISSN: | 0030-4026 |
| Popis: | The morphological, structural and optical properties of the new enantiopure (S)-(-)-1-[(1-phenyl)-N-(biphen-2-yl)methylidene]ethylamine in the solid state are reported. The molecular packing displayed a compact and dense three-dimensional arrangement associated with the biphenyl group as well as a significant distortion induced by the effect of the stereogenic carbon atom, contributing to the molecular torsion in a nonplanar angular-shaped small molecule. The morphology of this organic material showed dense crystalline surfaces. By X-ray diffraction (XRD) studies, an orthorhombic crystal system and a P212121 spacial group was established. The optical part was analysed by recording the coefficient of absorption which presented the behavior of an oxide and by the Tauc law a direct band gap can be seen, allowing to quantify the band gap at Eg ˜3.45 eV. The photoluminescence analysis performed at room temperature exhibited two emission bands located in the Vis-region which were identified as blue and green emission bands situated at ˜415 nm (˜2.98 eV) and ˜556 nm (˜2.23 eV), respectively. Finally, by Raman spectroscopy analysis, some vibrational modes were identified. |
| Databáze: | OpenAIRE |
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