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Journal of Spectroscopy
Volume 2013, Article ID 276413, 6 pages
Research Article

Synthesis and Evaluation of Changes Induced by Solvent and Substituent in Electronic Absorption Spectra of New Azo Disperse Dyes Containig Barbiturate Ring

1Department of Chemistry, Payame Noor University (PNU), Tehran 19395-4697, Iran
2Department of Chemistry, Azad University, Kerman, Iran
3Zarand High Education Center, Mining Engineering Department, Shahid Bahonar University, Kerman, Iran

Received 29 June 2012; Revised 14 September 2012; Accepted 17 September 2012

Academic Editor: Damien Boyer

Copyright © 2013 Hooshang Hamidian et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Six azo disperse dyes were prepared by diazotizing 4-amino hippuric acid and coupled with barbituric acid and 2-thiobarbituric acid. Then, the products were reacted with aromatic aldehyde, sodium acetate, and acetic anhydride, and oxazolone derivatives were formed. Characterization of the dyes was carried out by using UV-Vis, FT-IR, 1H NMR and 13C NMR, and mass spectroscopic techniques. The solvatochromic behavior of azo disperse dyes was evaluated in various solvents. The effects of substituents of aromatic aldehyde, barbiturate, and thiobarbiturate ring on the color of dyes were investigated.