Synthesis and optical properties of an azo metal chelate compound for optical recording medium

An azo nickel chelate compound has been synthesized. Smooth thin films have been prepared by spin-coating. The absorption, transmission and reflection spectra of the films were measured. The optical constant (complex refractive index N=n+ik) of the film on singlecrystal silicon has been determined using scanning ellipsometer, and the complex dielectric function (epsilon) as well as absorption coefficient (alpha) were then calculated. The optical recording medium was prepared by spin-coating on a PC substrate with aluminium as reflective layer. Dynamic optical recording test of the disc showed that the carrier-to-noise (CNR) of 45dB was obtained.