Synthesis and Characterization of New Azo Compounds Linked to 1, 8-Naphthalimide and Studying Their Ability as Acid-Base Indicators

  • Suaad M.H. Al-Majidi Department of Chemistry, College of Science, Baghdad University, Baghdad, Iraq
  • Mohammed G.A Al-Khuzaie Department of Chemistry, College of Science, Baghdad University, Baghdad, Iraq
Keywords: 1, 8-naphthalic anhydride, Azo compound, Acid-base indicators

Abstract

New Azo compounds containing an 1,8-naphthalimide moiety were synthesized from 1, 8-naphthalic anhydride by a reaction with p-phenylenediamine or benzidine to produce 1,8-naphthalimide derivatives (1 or 2), which were converted to diazonium salt derivatives by using sodium nitrite and acetic acid at 0-5 áµ’C. The diazonium salt was subjected to a coupling reaction with different substituted phenol in alkaline media at 0-5 áµ’c to produce azo compound derivatives (3-14).

The New Azo compound derivatives (3-14) were identified by 1H-NMR, 13C-NMR, and FTIR and by measuring characteristic physical properties and specific reactions. Also, the ability of the prepared azo compounds to work as acid-base indicator was investigated, since azo dyes have different and sharp colors in acidic or basic solutions.

Published
2019-11-27
How to Cite
Al-Majidi, S. M., & Al-Khuzaie, M. G. (2019). Synthesis and Characterization of New Azo Compounds Linked to 1, 8-Naphthalimide and Studying Their Ability as Acid-Base Indicators. Iraqi Journal of Science, 60(11), 2341-2352. https://doi.org/10.24996/ijs.2019.60.11.4
Section
Chemistry