分别对三种以4-甲基噻唑、苯并噻唑和6-甲基苯并噻唑作为重氮组份,以3-二乙氨基苯酚作为偶合组份的偶氮染料的镍螯合物的光谱、热学性质和薄膜的光学常数(复折射率N=n+ik)及光存储性能进行了研究。结果表明,以4-甲基噻唑作为重氮组份的偶氮镍螯合物在激光工作波长650 nm处具有较高的折射率指数(n=2.46)和较小的消光系数(k=0.18),在330℃左右分解,而且分解曲线陡峭。光盘静态测试仪的测试结果表明该染料薄膜在较低的写入功率和较窄的脉冲下,可以获得大的反射率对比度。该染料有望作为高密度可录光盘(DVD-R)的记录介质。

The ultraviolet-visible (UV-Vis) absorption spectra, optical constants (complex refractive index N=n+ik) of the thin films and thermal characterizations of three kinds of novel nickel-azo dyes based on 4-methylthiazole, benzothiazole and 6-methylbenzothiazole were investigated. Particularly, a dye based on 4-methylthiazole, with higher refractive index n=2.46 and lower extinction coefficient k=0.18 at the wavelength 650 nm and a sharp threshold of thermal decomposition at 330℃ was obtained. The results of the static optical recording test indicated that higher reflectivity contrast can be obtained at a low laser power and narrow pulse width for a single layer of the dye film based on 4-methylthiazole. These results demonstrate that the nickel-azo dye is a promising candidate as a recording medium of digital versatile disc-recordable (DVD-R).