Deep in blue with green chemistry: influence of solvent and chain length on the behaviour of <i>N</i>- and <i>N</i>,<i>N</i>′- alkyl indigo derivatives

Abstract

Using green chemistry procedures the synthesis of N - and N , N ′-alkyl indigo derivatives was undertaken and the effect of the alkyl chain length on the spectral (including color) and photophysical properties of the compounds explored.