Spectroscopic ellipsometry and UV–vis studies at room temperature of the novel organic–inorganic hybrid of salt Bis (4-acetylanilinium) tetrachlorocadmiate

• [C8H10NO]2CdCl4 compound has been synthesized by evaporation of aqueous solutions.
• UV–Vis spectrum showed three bands at absorption 240, 320 and 411 nm.
• Tauc's model was used to determine the optical gap energy.
• The refractive index was fitted to the Wemple–DiDomenico relation.

The optical properties of Bis (4-acetylanilinium) tetrachlorocadmiate compound were studied using phase modulated spectroscopic ellipsometry (PMSE) and ultraviolet–visible (UV–Vis) spectroscopy in the range 200–800 nm. The optical absorbance were measured in order to deduce the absorption coefficient α and optical band gap Eg, thus the Tauc model was used to determine the optical gap energy of the synthesized (C8H10NO)2CdCl4 compound. The analysis of the data revealed the existence of optical allowed direct transition mechanisms with the band gap energy equal to 3.17 eV. On the other hand the single-effective-oscillator model was used to fit the calculated data to the experimental ellipsometric spectra. Thus the values of the dispersion energy and single-oscillator strength are determined. Also, the extinction coefficient, refractive index, dispersion parameter and both the real εrεr and imaginary parts εiεi of the dielectric permittivity of Bis (4-acetylanilinium) tetrachlorocadmiate compound were calculated and the results are discussed.

(a) Plot of the refractive index versus wavelength (λ)(λ)for [C8H10NO]2CdCl4,(b) Plot of the extinction coefficient (k  ) versus wavelength (λ)(λ) for [C8H10NO]2CdCl4Figure optionsDownload as PowerPoint slide