Study of the Optical Properties of Isonitrosoacetophenone (C<sub>8</sub>H<sub>7</sub>NO<sub>2</sub>) Using UV-Vis Spectroscopy

Abstract

In this work, the optical properties (absorption, absorption coefficient, refractive index, band-gap energy, extension coefficient, and reflection) of the five samples of isonitrosoacetophenone (C 8 H 7 NO 2) was studied using Uv-Vis spectroscopy. The C 8 H 7 NO 2 was dissolved in different amounts of (0.5, 1, 1.5, and 2) ml of distilled water. The effect of concentration on the optical properties of C 8 H 7 NO 2 was investigated experimentally and it was shown that the different values of the calculated optical properties are clearly affected by the concentrations of the C 8 H 7 NO 2 compound. In addition, when the isonitrosoacetophenone is mixed with 2.0 ml of water the absorbance rate of the pure isonitrosoacetophenone was shown to be decreased from 2.7×10-4 (a. u.) at 278 nm to 1×10-4 (a. u.) at the same wavelength. Furthermore, the transmission of C 8 H 7 NO 2 was shifted towards the shorter wavelength as the concentration of water is increased, which is starts from ~346 nm for pure isonitrosoacetophenone and decreased to ~ 300 nm when mixed with 2.0 ml of water. The important finding of this work was that the compound C 8 H 7 NO 2 is opaque (non-transmittance) material from the wavelength of 220 to 300 nm which corresponds to the UV portion of the electromagnetic spectrum and this suggests more study in this area.