Insights into the physical basis of metal(II) hydrazone complexes with isoxazole and barbituric acid moieties for recordable blu-ray media

Tetrafluoropropanol soluble, metal(II) hydrazone complexes derived from alkyl substituted isoxazole and barbituric acid were synthesized and evaluated as suitable optical recording materials for the recordable blu-ray disc system. The behaviour and relationships of the absorption, reflectivity and optical constants (complex refractive indices N = n + ik) for different metal(II) complexes in spin-coated films were discussed. In addition, the important thermal decomposition data of these metal(II) complexes from simultaneous TG–DSC analyses were presented as well. As an example of the utility of dye-based blu-ray recording media, we used the nickel(II) hydrazone complex thin film as recording layer for static optical recording performance test. Results showed that high reflectivity contrast over 45% and durable information marks (after repeatedly reading 20,000 times) could be achieved under optimum laser writing power and pulse width conditions, indicative of producing a very promising optical recording medium for blu-ray disc-recordable system.