Synthesis and characterization of some novel linear azo-azomethine compounds based on 1-bromo, 4-4-4-nitrophenylazo phenoxy butane

Journal: Vol.5, No.1, 2012 - Article 4   Pages :   Until 

Article Code:

A. Mohammadi: Faculty of Sciences, University of Guilan - Department of Chemistry
Mohammad reza YazdanbakhshDepartment of Chemistry, Faculty of Sciences, University of Guilan, Rasht, Iran
Nosratollah Mahmoodi: University of Guilan - Department of Chemistry

Article's abstract:

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.

Azo dye; Schiff-base; Azo-azomethine; Substituent effect; Absorption spectra.

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