Microwave synthesis, photophysical properties of novel fluorescent iminocoumarins and their application in textile printing

Abstract

Purpose

This paper aims to synthesise coumarine flourescent dyes from a cheap material in a very short time with a very high yield, and by using a clean green chemistry.

Design/methodology/approach

Efficient microwave synthesis for some novel iminocoumarins starts from the reaction of p-phenyl-enediamine and ethyl cyanoacetate followed by cyclocondensation with salicylaldehyde derivatives.

Findings

The synthesized iminocoumarine compounds were characterized by spectroscopic methods. Absorption and fluorescence spectra of the compounds were also recorded. All compounds were fluorescent in 1,4-dioxane solution, they all emitted blue light (440-460 nm). The printing properties were studied, and their applications on printing polyester and polyamide fabrics were studied by silk screen printing.

Originality/value

The authors designed efficient microwavel synthesis for some novel iminocoumarine derivatives; The novel procedure features short-reaction time, moderate yields and simple workup; All compounds were fluorescent in 1,4-dioxane solution, and they all emitted blue light; The authors studied their application in printing polyester and polyamide fabrics.

Citation

Elgemeie, G.H., Ahmed, K.A., ahmed, E.A., helal, M.H. and Masoud, D.M. (2015), "Microwave synthesis, photophysical properties of novel fluorescent iminocoumarins and their application in textile printing", Pigment & Resin Technology, Vol. 44 No. 2, pp. 87-93. https://doi.org/10.1108/PRT-04-2014-0029