403480-99-9Relevant academic research and scientific papers
Synthesis and characterization of X-azo dyes (X = Ni, Cu, Zn) for digital versatile disc-recordable (DVD-R)
Park, Hye Yound,Lee, Nam Hyung,Je, Jong Tae,Min, Kyung Sun,Huh, Young Jae,Kim, Eung-Ryul,Lee, Haiwon
, p. 305 - 308 (2001)
We have synthesized 5-(diethylamino)-2-[(E)-2-(methoxy-1, 3-benzo thiazole)-1-diazenyl] phenol (DMBTA) azo and DMBTA complexed with Ni, Cu, and Zn for DVD-R fabrication. The structures of the products were characterized by 1H-NMR and FT-IR. The properties of the compounds required for DVD-R fabrication were elucidated by UV-VIS and TGA. From the UV-VIS data, Zn-DMBTA exhibited the best response with 635 nm generally used in a DVD player. Based on the analysis of TGA data, it showed high thermal stability. Accordingly, Zn-DMBTA is the best compound as a recording material for DVD-R fabrication.
Synthesis of metal-azo dyes and their optical and thermal properties as recording materials for DVD-R
Park, Hyeyoung,Kim, Eung-Ryul,Kim, Dong Jin,Lee, Haiwon
, p. 2067 - 2070 (2002)
Four kinds of azo dyes and their metal-azo dyes were synthesized in order to obtain a high reflective index and better thermal stability as a recording material for DVD-R. Several kinds of novel azo dyes based on benzoic acid, 6-methoxybenzothiazole, benzothiazole-6-carboxylic acid, and benzimidazole have been synthesized. These azo dyes reacted with metal ions, such as Ni2+, Cu2+, Zn2+, and Co2+, as ligands. All structures of the compounds were confirmed by 1H-NMR and FT-IR analyses. The optical and thermal properties of azo dyes and their metal-azo dyes were characterized by UV-vis and TGA analyses. In the UV-vis spectra, the absorption maxima of metal-azo dyes show at longer wavelength than those of azo dyes. These spectral shifts are affected by substituent groups, electron-donating or -withdrawing groups, of azo dyes and metal ions. The metal-azo dyes were thermally stable up to 300°C, which were confirmed by TGA analyses. Particularly, in the case of an azo dye complexed with Zn based on 6-methoxybenzothiazole, good absorption at 635 nm was observed, and its thermal stability was maintained up to 300°C, with high refractive index of about 2.08.
