Synthesis of a Series of Disperse Disazo Dyes and Investigation of Absorption Properties / Bir Seri Dispers Disazo Boyarmaddelerin Sentezi ve Absorpsiyon Özelliklerinin İncelenmesi

In our study, we aimed to synthesize diazo dyes containing heterocyclic compounds and obtain more batocromic colors. Ethyl 2-cyano-2-(2-phenylhydrazono)acetate (1a-1c) was obtained.with coupling reaction of the diazonium salts of o-, m- and p-NO2 aniline with ethyl cyanoacetate. 5-amino-4-(phenyldiazenyl)-1H-pyrazol-3-ol (2a-2c) mono azo dyes which are containing pyrazole ring were obtained with the ring closure of the obtained results with hydrazine hydrate. Synthesis of new disazo dyes (3a-3c)(4a-4c) were carried out with diazotized again to the obtained mono azo dye and coupling with 4-methyl-1-phenyl-2-pyrazoline and 3-methyl-1H-5-pyrazolone which we were synthesized. Structures of synthesized disazo dyes were characterized by spectroscopic methods. The effects of solvent on the visible absorption spectra of the dyes were also investigated. Calismamizda heterosiklik bilesenler iceren disazo boyarmaddelerin sentezlenmesi ve daha batokromik renklerin elde edilmesi amaclanmistir. o -, m - ve p -NO 2 anilinlerin diazonyum tuzlarinin etilsiyanoasetat ile kenetlenmesi ile etil-2-siyano-2-(2-fenilhidrazono)asetat (1a-1c) elde edilmistir. Elde edilen bu urunlerin hidrazin hidrat ile halka kapanmasi sonucu pirazol halkasi iceren 5-amino-4-(fenildiazenil)-1H-pirazol-3-ol (2a-2c) mono azo boyalari elde edilmistir. Elde edilen mono azo boyalarin tekrar diazolanip sentezledigimiz 4-metil-1-fenil-2-pirazolon ve 3-metil-1H-5-pirazolon bilesikleri ile kenetlenmesi sonucu yeni disazo boyarmaddelerinin (3a-3c)(4a-4c) sentezi gerceklestirilmistir. Sentezlenen disazo sinifi boyarmaddelerin yapilari spektroskopik yontemlerle aydinlatilmistir. Ayrica bilesiklerin absorpsiyon spektrumlari uzerine cozucu etkisi incelenmistir.