Add time:08/09/2019         Source:sciencedirect.com

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.

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