Synthesis Of The Azo Sensitized Dye Appliced In Solar Cell

Under microwave irradiation, the compound 2-(4-aminophenyl) benzoxazole was synthesized by condensation of o-aminophenol and p-aminophenol acid catalyzed by polyphosphoric acid. The influences of reaction time, microwave power output and catalyst were studied. The optimum reaction condition was as follows: PPA as catalyst, microwave power 260W and microwave irradiation time 4 min. The yield was 61%.The 2-(4-aminophenyl) benzoxazole compound was first diazotized with sodium nitrite in hydrochloric acid to generate aniline diazonium salt and then reacted with compounds such as 3-hydroxy-2-naphthoic acid, p-hydroxybenzoic acid and p-amino- benzoic acid. The influences of molar ratio of raw materials, reaction time and reaction temperature were studied and the optimum reaction condition was getted separately. The crude products were purified and the final compounds were characterized with MS, IR spectroscope and UV-visible absorption spectra. The electrochemical performances of these azo compounds were tested.Another kind of azo dye was synthesized firstly by the diazotizing of p-amino- phenol acid and secondly by the coupling of diazonium salt with 3-hydroxy-2-naph- thoic acid, p-hydroxy benzoic acid, imidazole and phenol separately. The influences of reaction time and reaction temperature to the reaction and yield were studied. The final compounds were characterized with 1HNMR, MS, IR spectroscope and UV-visible absorption spectra.At last the complexation of azo dyes with CuCl2,Cu(Ac)2 and RuCl3 was attempted. The final complexes were proved not the result we expected by the characterization of IR and UV-visible absorption spectra.