Institute for Color Science and Technology (ICST) Progress in Color, Colorants and Coatings 2008-2134 5 1 2012 03 20 Synthesis and characterization of some novel linear azo-azomethine compounds based on 1-bromo, 4-4-4-nitrophenylazo phenoxy butane 23 33 75793 10.30509/pccc.2012.75793 EN A. Mohammadi Department of Chemistry,Faculty of Sciences, University of Guilan M.R. Yazdanbakhsh Department of Chemistry, Faculty of Sciences, University of Guilan, Rasht, Iran, N. Mahmoodi Department of Chemistry, University of Guilan Journal Article 2011 11 30 The reaction of some carbocyclic and heterocyclic Schiff bases with the synthesized 1-bromo, 4-[4-(4-nitrophenylazo) phenoxy] butane and formation of novel linear azo-azomethine compounds in good to excellent yields were investigated. The compounds were fully characterized by UV-Vis, FT-IR, 1H NMR spectroscopic techniques and elemental analysis. Effects of various solvents on their visible absorption spectra at a concentration of 10-5-10-6 M were estimated. The color of the dyes is discussed with respect to the substituent therein. Introduction of an electron-withdrawing group into the para-position of azomethines produces bathochromic shift of the absorption peak in all solvents. The key features of these reactions are, in turn, their operational simplicity, mild reaction conditions and easily-accessed starting materials. https://pccc.icrc.ac.ir/article_75793_6bb61a2cc1da4e46915515e573990a0c.pdf