An Insight into Optical Constants of Iron Phenanthroline Molecules

Abstract

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 (), 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 (E_o), dispersion energy (E_d), 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 () have been computed, as has non-linear optical susceptibility (), direct energy gap by Tauc relation (), and Urbach energy of the localized states (E_u).