Preparation and Characterization of Two Azo Dyes For Dibenzothiophen by The Diazotization Reaction and Studying Their action as Acid-Base Indicators. | ||
| Journal of University of Anbar for Pure Science | ||
| Article 32, Volume 7, Issue 2, August 2013, Pages 1-6 PDF (553.74 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.37652/juaps.2013.84988 | ||
| Authors | ||
| Manaf A. Juma* ; Athra G. Sager | ||
| University of Anbar - College Of Science | ||
| Abstract | ||
| This research describes the preparation of two dyes , by nitration of dibenzothiophen to form p-nitro dibenzothiophen and reduction to form p-amino dibenzothiophen , and creating by the diazonium salt that is reacted with (1&2-naphthol ) to form azo dyes . Their FT.IR spectra and melting points were measured . One of these preparation dyes with orange color had been studied as an acid- base indicator by its effects in Titrimetric analysis by using methods of acid – base titration . Which was changed its color from colorless to orange in basic media , and from orange to colorless in acidic media . Dye (p- dibenzothiophen azo-8-naphthol) was an active acid-base indicator .The color difference between two spaces was clear, and the pH range of color change was (6-10). | ||
| Keywords | ||
| Dibenzothiophen; azo dyes; Indicator; Titrations | ||
| References | ||
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