An Insight into Optical Constants of Iron Phenanthroline Molecules

In this study, we investigate the optical properties of Iron 1,10-phenanthroline molecular nanolayer synthesized were prepared using the complexation reactions method. Fe2+(Phen) molecular thin films were then prepared as samples and subsequently characterized using XRD and UV-Vis spectroscopy. The main objective of this work is to explore the optical constants relevant to the light-induced spin crossover phenomenon in this molecule. UV-Vis study of nanometer thickness layer (100 nm) at wavelength(200-1100 nm), the distribution of refractive index is discussed in the framework of the single oscillator Wemple-DiDomenico model and various distribution parameters such as single oscillator energy (Eo), dispersion energy (Ed), refractive index (n(0)), and optical absorption based on absorption edges dielectric constant (e¥) using Miller's rule. The moment of the dielectric constant optical spectrum (M-1, M-3) and energy gap by Wemple-DiDomenico approximation (EWWDg) have been computed, as has non-linear optical susceptibility (x(3)), direct energy gap by Tauc relation (ETg), and Urbach energy of the localized states (Eu).